QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#256222#7751. Palindrome Pathucup-team135AC ✓715ms195180kbC++205.6kb2023-11-18 18:05:142023-11-18 18:05:14

Judging History

你现在查看的是最新测评结果

  • [2023-11-18 18:05:14]
  • 评测
  • 测评结果:AC
  • 用时:715ms
  • 内存:195180kb
  • [2023-11-18 18:05:14]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
const __int128 one = 1;
using ld = long double;
using i128 = __int128;
const ld eps = 1e-9;

int32_t main() {
#ifdef LOCAL
    freopen("../B.in", "r", stdin);
#endif
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    while (true) {
        next:;
        int n, m;
        if (!(cin >> n >> m)) return 0;
        vector<vector<bool>> ok(n + 2, vector<bool>(m + 2));
        for (int i = 1; i <= n; ++i) for (int j = 1; j <= m; ++j) {
            char c;
            cin >> c;
            ok[i][j] = (c == '1');
        }
        int si, sj, di, dj;
        cin >> si >> sj >> di >> dj;
        vector<pair<int, int>> ord;
        vector<vector<int>> used(n+2, vector<int>(m+2));
        auto dfs = [&](auto dfs, int i, int j) {
            if (!ok[i][j] || used[i][j]) return;
            used[i][j] = 1;
            ord.emplace_back(i, j);
            for (int di = -1; di <= 1; ++di) {
                for (int dj = -1; dj <= 1; ++dj) {
                    if (abs(di) + abs(dj) != 1) continue;
                    dfs(dfs, i + di, j + dj);
                    ord.emplace_back(i, j);
                }
            }
        };
        dfs(dfs, si, sj);
        for (int i = 0; i < n + 2; ++i) for (int j = 0; j < m + 2; ++j) {
            if (ok[i][j] && !used[i][j]) {
                cout << "-1" << '\n';
                return 0;
            }
        }
        string path;
        int i1 = si, j1 = sj;
        int i2 = di, j2 = dj;
        auto symbol = [&](int di, int dj) {
            if (di == 0 && dj == 1) return 'R';
            if (di == 0 && dj == -1) return 'L';
            if (di == 1 && dj == 0) return 'D';
            if (di == -1 && dj == 0) return 'U';
            return '.';
        };
        auto go = [&](int di, int dj) {
            if (di == 0 && dj == 0) return;
            assert(abs(di) + abs(dj) == 1);
            assert(ok[i1 + di][j1 + dj]);
            if (ok[i2 - di][j2 - dj]) {
                path += symbol(di, dj);
                i1 += di, j1 += dj;
                i2 -= di, j2 -= dj;
                return;
                assert(ok[i1][j1]);
                assert(ok[i2][j2]);
            }
            assert(ok[i1][j1]);
            assert(ok[i2][j2]);
            int k1 = 0, k2 = 0;
            while (ok[i2 + di][j2 + dj]) {
                i2 += di;
                j2 += dj;
                k2++;
                if (ok[i1 - di][j1 - dj]) i1 -= di, j1 -= dj, k1++;
                path += symbol(-di, -dj);
            }
            assert(ok[i1][j1]);
            assert(ok[i2][j2]);
            for (int i = 0; i < k1; ++i) {
                path += symbol(di, dj);
                i1 += di, j1 += dj;
            }
            assert(ok[i1][j1]);
            assert(ok[i2][j2]);
            path += symbol(di, dj);
            i1 += di, j1 += dj;
            assert(ok[i1][j1]);
            assert(ok[i2][j2]);
        };
        for (auto [i, j] : ord) {
            go(i - i1, j - j1);
        }
        int idx = 0;
        map<array<int, 4>, int> states;
        vector<array<int, 4>> list;
        for (int i = 0; i < n+2; ++i) {
            for (int j = 0; j < m+2; ++j) {
                if (!ok[i][j]) continue;
                for (int t = 0; t < n+2; ++t) {
                    for (int s = 0; s < m+2; ++s) {
                        if (ok[t][s]) { states[{i, j, t, s}] = idx++; list.push_back({i, j, t, s});}
                    }
                }
            }
        }
        int N = states.size();
        vector<vector<pair<int, char>>> g(N);
        for (auto [k, v] : states) {
            for (int di = -1; di <= 1; ++di) {
                for (int dj = -1; dj <= 1; ++dj) {
                    auto [i1, j1, i2, j2] = k;
                    if (abs(di) + abs(dj) != 1) continue;
                    if (ok[i1 + di][j1 + dj]) i1 += di, j1 += dj;
                    if (!ok[i2 + di][j2 + dj]) {
                        g[v].emplace_back(states[{i1, j1, i2, j2}], symbol(di, dj));
                    }
                    if (ok[i2 - di][j2 - dj]) {

                        i2 -= di, j2 -= dj;
                        g[v].emplace_back(states[{i1, j1, i2, j2}], symbol(di, dj));
                    }
                }
            }
        }
        queue<int> bfs;
        int start = states[{i1, j1, i2, j2}];
        bfs.push(start);
        vector<int> dist(N, N);
        dist[start] = 0;
        vector<pair<char, int>> prev(N);
        int x = -1;
        while (bfs.size()) {
            int cur = bfs.front();
            auto [i1, j1, i2, j2] = list[cur];
            if (i1 == i2 && j1 == j2) {
                x = cur;
                break;
            }
            bfs.pop();
            for (auto [nxt, c] : g[cur]) {
                if (dist[nxt] > dist[cur] + 1) {
                    dist[nxt] = dist[cur] + 1;
                    prev[nxt] = {c, cur};
                    bfs.push(nxt);
                }
            }
        }
        if (x == -1) {
            cout << "-1";
            return 0;
        }
        for (int i = 0; i < N; ++i) assert(i == start || dist[i] == N || dist[prev[i].second] + 1 == dist[i]);
        string half;
        while (dist[x] != 0) {
            auto [c, y] = prev[x];
            x = y;
            half += c;
        }
        reverse(all(half));
        path += half;
        string p = path;
        reverse(all(p));
        path += p;
        cout << path << '\n';
    }
    return 0;
}

这程序好像有点Bug,我给组数据试试?

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3620kb

input:

2 2
11
11
1 1 2 2

output:

RDLRULRDDRLURLDR

result:

ok Valid Solution (Length = 16).

Test #2:

score: 0
Accepted
time: 0ms
memory: 3620kb

input:

2 2
10
01
1 1 2 2

output:

-1

result:

ok No Solution.

Test #3:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

1 1
1
1 1 1 1

output:



result:

ok Valid Solution (Length = 0).

Test #4:

score: 0
Accepted
time: 1ms
memory: 3716kb

input:

5 4
1111
1111
1111
1111
1111
4 2 4 2

output:

UDDDDUUUULDUUUUDDDDRRUUDDDDUUUULLLRRRDUUUUDDDDUUDDDDUUUURRRLDUUUUDDDDLLUUDDDDUUUURDUUUUDDDDDDUUUUDRUUUUDDDDUULLDDDDUUUUDLRRRUUUUDDDDUUDDDDUUUUDRRRLLLUUUUDDDDUURRDDDDUUUUDLUUUUDDDDU

result:

ok Valid Solution (Length = 180).

Test #5:

score: 0
Accepted
time: 1ms
memory: 3740kb

input:

5 5
11111
10101
11111
10101
11111
1 4 5 5

output:

RRRRLLLLDDRRUDLLLLRRRRUUDDDDLRRRRLLUDLLUDRRLLLLRRRRUULRRRRLLLLUURRLLLLRRRRDDDDRRRRLLLLRRUULLLLRRRRLUURRRRLLLLRRDULLDULLRRRRLDDDDUURRRRLLLLDURRDDLLLLRRRR

result:

ok Valid Solution (Length = 152).

Test #6:

score: 0
Accepted
time: 1ms
memory: 3640kb

input:

5 3
111
100
111
001
111
4 3 3 2

output:

ULRRLLDDUURRLLDUUDDLLRRDDLRRLLLLRRULUULURRLLLLRRLDDRRLLDDUUDLLRRUUDDLLRRLU

result:

ok Valid Solution (Length = 74).

Test #7:

score: 0
Accepted
time: 0ms
memory: 3656kb

input:

5 4
1001
1101
1111
0011
0010
2 2 1 1

output:

LUDUUDDLLLRRRDUUUDUDDDRLDULRULLRRRLLLDDURULLURUDDLLLRRRLLURLUDLRDDDUDUUUDRRRLLLDDUUDUL

result:

ok Valid Solution (Length = 86).

Test #8:

score: 0
Accepted
time: 1ms
memory: 3660kb

input:

5 3
101
111
100
111
100
4 1 2 2

output:

UUUDRLLRRDUUDRRLLDDRLLRRRRLLDURLUULRUDLLRRRRLLRDDLLRRDUUDRRLLRDUUU

result:

ok Valid Solution (Length = 66).

Test #9:

score: 0
Accepted
time: 0ms
memory: 3696kb

input:

5 5
01110
10110
11110
11011
11100
2 4 5 1

output:

DDDUUULLRUUUDDLRLLUDDLLLRDRLLLRRLURRRLULRRLRRDRLURLUDDDUURUUUDLDLDDLDLDUUURUUDDDULRULRDRRLRRLULRRRULRRLLLRDRLLLDDULLRLDDUUURLLUUUDDD

result:

ok Valid Solution (Length = 132).

Test #10:

score: 0
Accepted
time: 1ms
memory: 3592kb

input:

5 3
011
111
110
111
011
3 1 2 1

output:

ULRURDULDDDLRLRRUDRRLLLRDURLUURLLDUUDLLRUULRUDRLLLRRDURRLRLDDDLUDRURLU

result:

ok Valid Solution (Length = 70).

Test #11:

score: 0
Accepted
time: 1ms
memory: 3648kb

input:

4 5
11111
11111
11111
11111
3 2 1 3

output:

UULDDUUUDDDRRDDDUUURLLLLRRRRDRRRRLDLLLLRRRRUUUDDDRRRRLLLLLRRRRDDDURRRRLULLLLRRRRURRRRLLDDUUUDDDLLDDDUUURDDULLRRRRLLUDDRUUUDDDLLDDDUUUDDLLRRRRURRRRLLLLULRRRRUDDDRRRRLLLLLRRRRDDDUUURRRRLLLLDLRRRRDRRRRLLLLRUUUDDDRRDDDUUUDDLUU

result:

ok Valid Solution (Length = 222).

Test #12:

score: 0
Accepted
time: 0ms
memory: 3956kb

input:

5 5
11111
10101
11111
10101
11111
2 5 1 1

output:

ULLLLDUUUUDDLLLLRRUDRRDDLLUDLRRRRLLLLDDDDUUUUUDDDDLLLLRRRRUULLLRRRRLLLLDDDDUUUURRRRDULLLLUDRRRRUUUUDDDDLLLLRRRRLLLUURRRRLLLLDDDDUUUUUDDDDLLLLRRRRLDULLDDRRDURRLLLLDDUUUUDLLLLU

result:

ok Valid Solution (Length = 174).

Test #13:

score: 0
Accepted
time: 0ms
memory: 3668kb

input:

4 5
11111
10000
11111
00001
1 3 4 5

output:

LLDUDDRRRRDULLLLDUURRRRLLLLDDRRRRDDLLLLRRRRUUDLLLLUDRRRRDDUDLL

result:

ok Valid Solution (Length = 62).

Test #14:

score: 0
Accepted
time: 0ms
memory: 3632kb

input:

3 5
10100
00010
00111
1 3 1 1

output:

-1

result:

ok No Solution.

Test #15:

score: 0
Accepted
time: 1ms
memory: 3888kb

input:

4 5
10001
11111
11100
11111
4 5 3 1

output:

LLUDDUULLDUUUDDRUDDRRRRLLLLLLLLRDULURRRRUDLLUUDDRRULLLLURRDDUULLDURRRRULUDRLLLLLLLLRRRRDDURDDUUUDLLUUDDULL

result:

ok Valid Solution (Length = 106).

Test #16:

score: 0
Accepted
time: 1ms
memory: 3652kb

input:

3 5
11111
10100
11111
1 2 3 5

output:

RRRRLLLLDDLLLLRRUURRLLDDRRLLLRRRRLLLLUULLLLRRDDRRDDRRLLLLUULLLLRRRRLLLRRDDLLRRUURRLLLLDDLLLLRRRR

result:

ok Valid Solution (Length = 96).

Test #17:

score: 0
Accepted
time: 0ms
memory: 3612kb

input:

4 5
01110
10101
11011
10111
1 3 2 3

output:

-1

result:

ok No Solution.

Test #18:

score: 0
Accepted
time: 1ms
memory: 3768kb

input:

5 5
11111
11111
11111
11111
11111
1 3 5 2

output:

LLDRRRULLLLRRRRDDRRRRLLLLDRRRLLLLRRRRDRRRRLLLLRRRLLLLRRRRURRRRLLLLURRRLLLLRRRRUURRRRLDLLLURRRLLDDDDLLRRRULLLDLRRRRUURRRRLLLLRRRULLLLRRRRURRRRLLLLRRRLLLLRRRRDRRRRLLLLRRRDLLLLRRRRDDRRRRLLLLURRRDLL

result:

ok Valid Solution (Length = 194).

Test #19:

score: 0
Accepted
time: 0ms
memory: 3880kb

input:

5 5
11111
10101
11111
10101
11111
5 1 2 3

output:

UUUDDDDUUUURRLLLLRRRRDDLRRRRLLUDLRUUUUDDDDLRRRUDLLUDDDDUULLLLRRRRUULRRRRLLLLUUUUDDDDDUURRUUDDDDDUUUULLLLRRRRLUURRRRLLLLUUDDDDULLDURRRLDDDDUUUURLDULLRRRRLDDRRRRLLLLRRUUUUDDDDUUU

result:

ok Valid Solution (Length = 176).

Test #20:

score: 0
Accepted
time: 1ms
memory: 3700kb

input:

5 5
11111
10000
11111
00001
11111
4 5 5 3

output:

ULLRRRRLLLLUURLLLLRRRRLLRRRRLLLLDDRLLLLRRRRDDLLRRRRLLLLRLLLLRRRRUDLLDURRRRLLLLRLLLLRRRRLLDDRRRRLLLLRDDLLLLRRRRLLRRRRLLLLRUULLLLRRRRLLU

result:

ok Valid Solution (Length = 134).

Test #21:

score: 0
Accepted
time: 0ms
memory: 3556kb

input:

5 5
01010
10101
10101
11001
10011
4 1 5 4

output:

-1

result:

ok No Solution.

Test #22:

score: 0
Accepted
time: 0ms
memory: 3656kb

input:

5 5
10101
11111
10101
11111
11111
3 1 2 4

output:

UUDRRUDRLLLLRRRRUDDUUUUDDDRRRRLLDUUUDDLLDRRRLLLLRRRRRRRRLLLLURRRLLLLRRRRDDDDUUURRRRLLLLDULRRRRLUDLLLLRRRRUUUDDDDRRRRLLLLRRRULLLLRRRRRRRRLLLLRRRDLLDDUUUDLLRRRRDDDUUUUDDURRRRLLLLRDURRDUU

result:

ok Valid Solution (Length = 184).

Test #23:

score: 0
Accepted
time: 1ms
memory: 3712kb

input:

5 5
00001
11111
01110
01111
01111
1 5 5 2

output:

DLLLRRRLLLLLLLRUDRRDLLUDDRRRDDDUUUUDLLLDURRULLDUURRRULDLDDLDLURRRUUDLLURRUDLLLDUUUUDDDRRRDDULLDRRDURLLLLLLLRRRLLLD

result:

ok Valid Solution (Length = 114).

Test #24:

score: 0
Accepted
time: 0ms
memory: 3636kb

input:

5 5
01011
10111
11011
10101
01110
4 1 2 3

output:

-1

result:

ok No Solution.

Test #25:

score: 0
Accepted
time: 0ms
memory: 4728kb

input:

10 8
11111111
11111111
11111111
11111111
11111111
11111111
11111111
11111111
11111111
11111111
7 7 3 6

output:

UUUUUULLRRRRRRRLLLLLLLDRRRLLLLLLLRRRRRDLRRRRRRRLLLLLLLDRRRLLLLLLLRRRRRDLRRRRRRRLLLLLLLDRRRLLLLLLLRRRRRDLRRRRRRRLLLLLLLDRRRLLLLLLLRRRRRRRUUUUUUUDDDDDDDDLLLRRRRRRRLLLLLLLUUUUUUUUUDDDDDDDDDRRRLLLLLLLRRRRRRRLLLRRRRRRRLLLLLLLDDDDDDDDDURRRLLLLLLLRRRRRRRULLLRRRRRRRLLLLLLLURRRLLLLLLLRRRRRULRRRRRRRLLLLLLLURR...

result:

ok Valid Solution (Length = 780).

Test #26:

score: 0
Accepted
time: 2ms
memory: 4124kb

input:

10 6
111111
101010
111111
101010
111111
101010
111111
101010
111111
101010
1 6 2 3

output:

LLLLLDUUUUUUUUUDDRRDDDDDDDDDUUUUUUUUUUUUUUUUUDDRRDDDDDDDDDUUUUUUUUUUUUUUUUUDDRLDDLLUDLLUDDDRRUDRRUDRLDDLLUDLLUDDURRDURRRLDUUULLLLUURRRRRLUULLLLDDDDDDDDDUUUUUUUUURRRRRLDULLUDLRRRRRUUUUUUUUUDDDDDDDDDLLLLUULRRRRRUULLLLUUUDLRRRUDRRUDDULLDULLDDLRDURRDURRDDDULLDULLDDLRDDUUUUUUUUUUUUUUUUUDDDDDDDDDRRDDUUUUU...

result:

ok Valid Solution (Length = 340).

Test #27:

score: 0
Accepted
time: 2ms
memory: 4232kb

input:

10 10
1111111111
1000000000
1111111111
0000000001
1111111111
1000000000
1111111111
0000000001
1111111111
1000000000
5 5 5 2

output:

LLLLDDRRRRRLLLLLLLLLRRRRRRRRRDDLLLRRRRRRRRRLLLLLLLLLDURRRRRLLLLLLLLLRRRRRRRRRUULLLRRRRRRRRRLLLLLLLLLUURRRRRLLLLLLLLLRRRRRRRRRUULLLRRRRRRRRRLLLLLLLLLUURRRRRLLLLLLLLLRRRRRRRRRLLLRRRRRRRRRLLLLLLLLLDDRRRRRLLLLLLLLLRRRRRRRRRDDLLLRRRRRRRRRLLLLLRLLLLLLRLLLLLRRRRRRRRRLLLDDRRRRRRRRRLLLLLLLLLRRRRRDDLLLLLLLLLR...

result:

ok Valid Solution (Length = 484).

Test #28:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

10 10
1010110101
0000011010
1001001001
0011111000
1000111100
1011101001
1100110011
0110001011
0011111000
0101011101
7 5 4 3

output:

-1

result:

ok No Solution.

Test #29:

score: 0
Accepted
time: 2ms
memory: 4136kb

input:

10 6
100100
111111
100001
111111
101111
111111
101010
111111
111100
111111
6 5 7 3

output:

UULRRRLLLLLUDDDDDDUUUUUUUUDRRLLLLLRRRUDRRUUDDDUUDDDDDUUUDDUUULLRRRRRLLLLLUUUUUUDDDDDRRURUUDDDDULDDDLLUDDRRRURUDLLLLLRRRRRRRRRRLLDDLLLRRRRLLLLLRRRRRRRRRRLLULLLURRUULLUURRLLLRRRRDDLDULDDLUDLDDRRRRLLLRRUULLUURRULLLULLRRRRRRRRRRLLLLLRRRRLLLDDLLRRRRRRRRRRLLLLLDURURRRDDULLDDDLUDDDDUURURRDDDDDUUUUUULLLLLRR...

result:

ok Valid Solution (Length = 366).

Test #30:

score: 0
Accepted
time: 3ms
memory: 4568kb

input:

10 8
11111110
11110111
01111111
11111101
11011101
11111111
11111011
11011101
11001111
11111110
7 1 2 1

output:

DUUUDUULLLLLLRUUDDUUURRRRRRLLLLLLUDDULLLLLLRRRRRRUUUUUUUUUDLDLLDDDDDDDUUUUUULDDRRRUUUDDDDLLDLLDDUUUUUDDDDRLLRRRRURRRUUUUDLRDDDDRRRLLLLRDUUUUUUUDDDDDDDLLULLRUDDDLRRRLLLLLUDDUURRLDDUULLRUUDDDDRLLLRRRRRRLLUDUURDRRDDDDDDDUUULLLDLRRLLLURRURRDDDUULLLUURUUUUUUUDDRRURDDDDDDDDDUULLLLLUUDDDRRRRRRLLLLLUDDUDDLU...

result:

ok Valid Solution (Length = 608).

Test #31:

score: 0
Accepted
time: 0ms
memory: 3588kb

input:

10 10
1111011101
1110111110
1111011111
1011101111
0101010111
1110111111
0111010111
1011111011
0111010101
1011111110
2 6 7 4

output:

-1

result:

ok No Solution.

Test #32:

score: 0
Accepted
time: 0ms
memory: 4816kb

input:

8 10
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
8 10 6 10

output:

UUDDDDDDDUUUUUUURRRRRRRRRLLLLLLLLLDRRRRRRRRDLLLLLLLLDRRRRRRRRDLLLLLLLLUUUUUUUDDDDDRRRRRRRRDLLLLLLLLDRRRRRRRRLLLLLLLLURRRRRRRRULLLLLLLLDDDDDDDUUURRRRRRRRULLLLLLLLURRRRRRRRULLLLLLLLURRRRRRRRLLLLLLLLLRRRRRRRRRDDDDUUUUUUUDDDDDDDUUDDDDDDDUUUUUUUDDDDRRRRRRRRRLLLLLLLLLRRRRRRRRULLLLLLLLURRRRRRRRULLLLLLLLURR...

result:

ok Valid Solution (Length = 450).

Test #33:

score: 0
Accepted
time: 4ms
memory: 4800kb

input:

10 10
1111111111
1010101010
1111111111
1010101010
1111111111
1010101010
1111111111
1010101010
1111111111
1010101010
3 5 9 1

output:

UDDDDDDDDDUUUUUUUUULLLLUUUUUUUUUDDRRUDRLDDLLUDDDRRUDRRUUUDLRLLLLLLLLLRRRRRRUUUDDDDDDDDDUUUUUUUUULRRRRLUUUUUUUUUDDLRRLDDLRRLDDLLUDLRDDLRRRRRRRRRLLLLLUDLLUDLLUDDURRDURRDULLLLLLLLLRRRRRRRRUDRLDULLDUUURRRLUUUUUDDDDDDDDDUUUUUUUUULLUUUUUUUUUDDLRDDLRRRRRRRRRLLLLLDDLLLLUURRUULLUDDDDDDDDDUUUUUUUUURRRRUUUUUUU...

result:

ok Valid Solution (Length = 618).

Test #34:

score: 0
Accepted
time: 2ms
memory: 4256kb

input:

10 10
1111111111
1000000000
1111111111
0000000001
1111111111
1000000000
1111111111
0000000001
1111111111
1000000000
5 4 7 2

output:

LLLDDRRRRLLLLLLLLLRRRRRRRRRDDLLLLRRRRRRRRRLLLLLLLLLDURRRRLLLLLLLLLRRRRRRRRRUULLLLRRRRRRRRRLLLLLLLLLUURRRRLLLLLLLLLRRRRRRRRRUULLLLRRRRRRRRRLLLLLLLLLUURRRRLLLLLLLLLRRRRRRRRRLLLLRRRRRRRRRLLLLLLLLLDDRRRRLLLLLLLLLRRRRRRRRRDDLLLLRRRRRRRRRLLLLLLRDDLLLLDDRLLLLLLRRRRRRRRRLLLLDDRRRRRRRRRLLLLLLLLLRRRRDDLLLLLLL...

result:

ok Valid Solution (Length = 486).

Test #35:

score: 0
Accepted
time: 0ms
memory: 3644kb

input:

9 10
1111001000
1110010111
0001001000
0101000101
1101000001
0111100110
0010010000
0001001000
1011001101
2 8 5 2

output:

-1

result:

ok No Solution.

Test #36:

score: 0
Accepted
time: 1ms
memory: 3952kb

input:

5 10
1001011101
1111111111
1000011001
1111111111
1101110010
4 3 4 7

output:

LLUDUUUDRRRUDRRULLRRDLDLDLLDRRLLURRRRRRUUUDLRDDLDULLLURURULRRLLDLLLLLUDDDUDDRLDURRRRRRRRUDLRDDUDDDULLLLLDLLRRLURURULLLUDLDDRLDUUURRRRRRULLRRDLLDLDLDRRLLURRDURRRDUUUDULL

result:

ok Valid Solution (Length = 168).

Test #37:

score: 0
Accepted
time: 0ms
memory: 3560kb

input:

7 10
1111111001
1111101110
1111011111
1101011101
1111011111
1111001011
1111111011
7 10 7 2

output:

-1

result:

ok No Solution.

Test #38:

score: 0
Accepted
time: 2ms
memory: 4688kb

input:

9 10
0101011101
1111111111
0101111111
1111111111
1111110101
1011111111
1101111101
1111111011
1101011111
3 7 7 10

output:

UURRRRLLDLRRRRRRLLLLLLUDLLUDLRDDLDLLLLRRURULLLLRRDLDLDRRRRRRRLLLLLLLLLLLLLLRRRUDRRUUUDDDDDDDDUUUUUUDLLRRRRUDUUUDDLDRDDLRUUUDDDDDLDLLUURRRRRRRRRLLLLUUDDDLLULUDDDRLUURDRRLLLLLLLRRRRRDULRRRRRRRLLLDUDDUURRLLLLLLLLLRRRRLDDRRRLURUDDDUUUUULURDDDUUUULRRLLUUUUUUUUDDDLRDDLLLLURURULRRRRLLLLLDLDLRRRRLLLLLURUURR...

result:

ok Valid Solution (Length = 648).

Test #39:

score: 0
Accepted
time: 6ms
memory: 5672kb

input:

10 10
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
9 5 3 2

output:

UUUUUUUDDDDDDDDDUUUUUUUUULLLLUUUUUUUUUDRRRDLLLDRRRDLLLDRRRDLLLDRRRDLLLDRRRRRUUUUUUUUDDDDDDDDDUUUUUUUUULLLLLLLLLRRRRRRRRRUUUUUUUUUDLLLDRRRDLLLDRRRDLLLDRRRDLLLDRRRDLLLRRRULLLURRRULLLURRRULLLURRRULLLURRRDDDDDDDDDUUUUUUUUULLLRRRRRRRRRLLLLUUUUUUUUUDDDDDDDDDLLLLLURRRULLLURRRULLLURRRULLLURRRULLLDDDDDDDDDUU...

result:

ok Valid Solution (Length = 670).

Test #40:

score: 0
Accepted
time: 4ms
memory: 4788kb

input:

10 10
1111111111
1010101010
1111111111
1010101010
1111111111
1010101010
1111111111
1010101010
1111111111
1010101010
2 1 1 3

output:

URRRRRRRRRLDUUUUUUUUUDDLLDDDDDDDDDUUUUUUUUUUUUUUUUUDDLLDDDDDDDDDUUUUUUUUUUUUUUUUUDDLLDDDDDDDDDUUUUUUUUUUUUUUUUUDDLLDDRRUDRRUDRRUDRRUDRLDDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRLDULLDULLDULLDULLDUUURRRRRRRRRLUULLLLLLLLUURRRRRRRRRLDDDDDDDDDUUUUUUUUULLLLLLLLDURRUDLLLLLLLLUUUUUUUUUDDDDDDDDDLRRRRRRRRRUULLLLL...

result:

ok Valid Solution (Length = 508).

Test #41:

score: 0
Accepted
time: 2ms
memory: 4256kb

input:

10 10
1111111111
1000000000
1111111111
0000000001
1111111111
1000000000
1111111111
0000000001
1111111111
1000000000
7 4 3 5

output:

LLLUURRRRRRRLLLLLLLLLRRRRRRRRRUULRRRRRRRRRLLLLLLLLLUURRRRRRRLLLLLLLLLRRRRRRRRRLRRRRRRRRRLLLLLLLLLDDRRRRRRRLLLLLLLLLRRRRRRRRRDDLRRRRRRRRRLLLLLLLLLDDRRRRRRRLLLLLLLLLRRRRRRRRRDDLRRRRRRRRRLLLLLLLLLDURRRRRRRLLLLLLLLLRRRRRRRRRUULRRRRRRRRRLLLLLLLLLLLUURRRRRRRRRRUULLLLLLLLLLLRRRRRRRRRLUURRRRRRRRRLLLLLLLLLRR...

result:

ok Valid Solution (Length = 500).

Test #42:

score: 0
Accepted
time: 0ms
memory: 3556kb

input:

10 10
1110000101
1100110001
1011011001
0000000111
0010010111
0100111011
1110010011
1100111111
0110001110
0100000101
9 9 6 10

output:

-1

result:

ok No Solution.

Test #43:

score: 0
Accepted
time: 4ms
memory: 4952kb

input:

10 10
1110111011
1111111111
1110110000
1111111111
1010011100
1111111111
1111001110
1111111111
1001010011
1111111111
6 9 2 9

output:

LDUUURRRRRRRRRLLLLUUDDDUUUULUUUUUUUDLLULLDLLRDLDRRUDRRDDDDDUUUUUUDDDLLDDLLUDDRRRURLLRRRURDDRRDLRLLLRLLLRLLLRLLDDLLRRRUDLLRRRRUDRLLRRRRURUDDULDLRRLLLLLRRLLLLLRRLLLUULRRLRRRLRRRLRRRULLUULDRRLLLLDLLLURRUULLURURRLLLURRDRRDDDDDDDUUURRUUUUUUUUUDLLLLLLLLLRRRRRRRRDDDDURDULUUUUDLRRRRRRRRRLLLDDDDDDDDDULUUUDDD...

result:

ok Valid Solution (Length = 672).

Test #44:

score: 0
Accepted
time: 5ms
memory: 4768kb

input:

10 10
1111110011
1011111110
0111011111
1101101101
1111111110
1110111101
1011011111
1111111101
1011111101
1111111011
7 3 5 5

output:

UDDUUURLLUDDDDUUURUULRRLLLUUUDDDDULLRRRLLRRRRDLLDUDDRDLRRRUUURLLLLLRRRRRRURLDUUDDLDUUUUUUUUDDDRLDLRRRRRLLLRDRRLLLLLLLRRRRUDDDDLRUUULRRRRRRRLLDLLLLUDLLLUUUDDDDDDUUUUUUUUUUUUDDRLDDDDLLLLLLLLRRURRRLLLRRRRRLDLRRRRRRRRLLLRLLLLLLLLRRRRRRURRRLLLLLDLRRRRRRRRLLLLLLUURRRRRRRULLULLLLLRRRUDDDDDDDDUUUUUURLLLLRRR...

result:

ok Valid Solution (Length = 726).

Test #45:

score: 0
Accepted
time: 0ms
memory: 3640kb

input:

10 10
1101011101
1110111011
0101110101
1111101011
1111111111
1010111010
0111111101
1111101011
0111111101
1011101111
3 8 2 2

output:

-1

result:

ok No Solution.

Test #46:

score: 0
Accepted
time: 38ms
memory: 16712kb

input:

20 12
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
111111111111
16 8 13 12

output:

UUUUUUUDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUURRRRRRRRRRRLLLLLLLLLLLDRRRRRRDLLLLLLDRRRRRRDLLLLLLDRRRRRRDLLLLLLDRRRRRRUUUUUUUUUUUUUUUUUUUDDDDDDDDLLLLLLDRRRRRRDLLLLLLDRRRRRRDLLLLLLDRRRRRRDLLLLLLDRRRRRRDLLLLLLDRRRRRRLLLLLLLLLLLRRRRRRRURUUUUUUUUDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUURRRDLLDRRDLLDRRDLLDRRD...

result:

ok Valid Solution (Length = 1686).

Test #47:

score: 0
Accepted
time: 50ms
memory: 19568kb

input:

20 17
11111111111111111
10101010101010101
11111111111111111
10101010101010101
11111111111111111
10101010101010101
11111111111111111
10101010101010101
11111111111111111
10101010101010101
11111111111111111
10101010101010101
11111111111111111
10101010101010101
11111111111111111
10101010101010101
111111...

output:

LUUUUUULLLLDDRRUDRLDDLLUDDDRRUDRLDDLLUDDDRRUDRRUUUDLRRRUUUUUUUULRRRRRRRRRRRDDLLUDLLUDLLUDLLUDLRDDLRRRUDRRUDRRUDRRUDDDLLUDLLUDLLUDLLUDLRDDLRRRUDRRUDRRUDRRUDDDLLUDLLUDLLUDLLUDLLUDLRDUUUUUUUUUUUUUUUUUUUDDDDDDDDDDDDLLDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUUUUUUUUUDDDDDDDDDDDDLLDDDDDDDDDDDDDDDDDDDUUUUUUUU...

result:

ok Valid Solution (Length = 2052).

Test #48:

score: 0
Accepted
time: 23ms
memory: 12460kb

input:

20 19
1111111111111111111
1000000000000000000
1111111111111111111
0000000000000000001
1111111111111111111
1000000000000000000
1111111111111111111
0000000000000000001
1111111111111111111
1000000000000000000
1111111111111111111
0000000000000000001
1111111111111111111
1000000000000000000
11111111111111...

output:

UULLLLLLLRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLUURRRRRRRRRRLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRUULLLLLLLRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLUURRRRRRRRRRLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRLLLLLLLRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRDDLLLLLLLRRRRRRRRRRRRRR...

result:

ok Valid Solution (Length = 1900).

Test #49:

score: 0
Accepted
time: 0ms
memory: 3800kb

input:

20 16
0101001111110001
0000111101001011
0000111100011001
1101110100110100
1011011110001101
1101000110111111
0111010111100101
1101101111011001
1101010100000101
1111001000110010
0001011000101000
0101111010110110
0001101111000111
1010100010000110
0100100011011100
0100100101011111
0001000001001110
10011...

output:

-1

result:

ok No Solution.

Test #50:

score: 0
Accepted
time: 64ms
memory: 22200kb

input:

20 18
100101011111011110
111111111111111111
101111101010000001
111111111111111111
110010011011001010
111111111111111111
110110111110000010
111111111111111111
100001000001111000
111111111111111111
100010100111111000
111111111111111111
111100011010110111
111111111111111111
111101010111011110
111111111...

output:

ULLUUUULLRRRRRRRRRRRRRRRRRLLLLLLLUUUUDDDDUUUUUUULLLDLLUDLLUDLLLUDDDRRURRLLLLLLLLLLLLLLLLLRRRRUUUUDDLRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLRDDLLLULDDRDLDDRRRRRUULURLDLRULRDRLLLLLLLLLLLLLLLLLRRRRRRDDUULRRUDDUUURDUUURLDUDDRLDUDDRDLRRRLLLUDDRRLLDULLLRRRULDUUULUUDDLDUUDDRRRRRRRRRRRRRRRRRLLLLLLLLLLLLDDLLLLLLLLLL...

result:

ok Valid Solution (Length = 2606).

Test #51:

score: 0
Accepted
time: 64ms
memory: 24408kb

input:

20 16
1110111111111111
1111111001111111
1111110111111011
1111110011111111
1111111111011111
1111110111101111
1111011111111111
1101111111111111
1011111111111001
0111111011111111
1110111111111111
1111111111111111
1111011011111111
0101110111111111
1110111101111110
1111111111111111
1111111111011111
11111...

output:

LRRRRRLLLLLLLLDLLULRRRRRLLUUUUUUUUUUDRDLDRLLLLLLLLLLLLLLLRRURRLLRRRDDDUUUURLUUUDDDRRRRRRRRRRRRRRRLLDLLLDRRRRULLLLLLLLLRRRRRRRRUULRRUDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUURLLLLLLLLLLLRRRRRRRRRRRUUUUDLLLLRRRRLLLLLDRRDLLLDDLLUUUUUUUDDLRRRRRRRRRRRRLLLLLLLLLLUDDRRRLLLLLURLLRLLDLLLRRRRLDUULRRLRRDDLDLDLDRR...

result:

ok Valid Solution (Length = 3040).

Test #52:

score: 0
Accepted
time: 0ms
memory: 3884kb

input:

20 18
110111110101110101
101010111110101010
110101111101111101
111011111011101111
010111110111111101
111011111011111011
011111110111010111
101110101010111010
010111110101110111
101010101011101110
011101110111011111
101010111011111010
010101111111110101
101011101110111011
110101011101010101
101010101...

output:

-1

result:

ok No Solution.

Test #53:

score: 0
Accepted
time: 48ms
memory: 21788kb

input:

14 20
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
...

output:

DDDDDDDDDDDDDUUUUUUUUUUUUULDDDDDDDDDDDDUUUUUUUUUUUUUDDDDDDDDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUURRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRDLLLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLDRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRDLLLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLDRRRRRRRRRRRLLLLLLLLLLLL...

result:

ok Valid Solution (Length = 2930).

Test #54:

score: 0
Accepted
time: 58ms
memory: 22860kb

input:

19 20
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
...

output:

RRRRRRRRRRRRRRRRRRRLDDLLUDLLUDLLUDLLUDLLUDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRRUDRRUDRRUDRRUDRRUDRLDDLLUDLLUDLLUDLLUDLLUDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRRUDRRUDRRUDRRUDRRUDRLDUUUUUUUUUUUUUUUUUUDDDDDDDDDDLLDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUUUUUUUUUDDDDDDDDDDLLDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUU...

result:

ok Valid Solution (Length = 2804).

Test #55:

score: 0
Accepted
time: 7ms
memory: 5872kb

input:

10 20
11111111111111111111
10000000000000000000
11111111111111111111
00000000000000000001
11111111111111111111
10000000000000000000
11111111111111111111
00000000000000000001
11111111111111111111
10000000000000000000
5 6 8 20

output:

LLLLLDUUDDRRRRRRRRRRRRRRRRRRRUDDLLLLLLLLLLLLLLLLLLLDURRRRRRRRRRRRRRRRRRRUDUULLLLLLLLLLLLLLLLLLLDDUURRRRRRRRRRRRRRRRRRRUDDUURRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRR...

result:

ok Valid Solution (Length = 700).

Test #56:

score: 0
Accepted
time: 0ms
memory: 3580kb

input:

18 20
11011110100011011100
01100010001011110000
11100110001011101110
10110111100011001111
10100011111011110011
00001010110000010010
01101101100110010001
10001000111110000100
11000011001000001001
10101011101010100110
01111011011010100001
00010110000101101011
10110101011011000011
00110010111011000100
...

output:

-1

result:

ok No Solution.

Test #57:

score: 0
Accepted
time: 76ms
memory: 27148kb

input:

20 20
10101101000110011011
11111111111111111111
10110101010011101111
11111111111111111111
11010000010101011110
11111111111111111111
10100110101011011011
11111111111111111111
10010101101010101001
11111111111111111111
11101001101101101010
11111111111111111111
11100110110111110111
11111111111111111111
...

output:

UUUDDDDDDUUUUUUUUUUUULLLLLUUDDUUUULUDLLUDDUUDDDRRDDDDDDDDUUUUUUUUUDDDLDLDRRDUUDDLLUDDDRRRUURRURDRDDLLUDLDDLLULLDRDLUUDDDRRDDDDDDDDUUUUUUUUUDDDDRRRUURRUDLDDRDLDLLULDLLULDDUUDDDRRDDDDDDDDUUUUUUUUUDDRRRRUDRRURUUUUURUUUUUULUUUULLUDLLULDURDDDLRRRUDRLLLUURRRRRRDDDDDDDDDDDDDDDDDDDURUUUUUUUUUUUUUUUUUUUDLLLL...

result:

ok Valid Solution (Length = 2742).

Test #58:

score: 0
Accepted
time: 81ms
memory: 28240kb

input:

18 20
11111111111110111111
01111111111011111111
01111111111110011111
11111111111101111111
11111011111110111111
11111111111110111110
11111111111111011111
11011111111111111110
11110111111111001111
10111111110110111111
11111011111111111111
11111111111011101111
11101111001111111111
11111111111111111111
...

output:

DDDDUUUULUUUDDDDUUUUUUUUUDDDDUUUUUUUUULLLLLLLRDRRRRRUDDLLLLLDLDRRURRRRUDDDLLULDLLLDRRRRRLLLLLRRRRRRDLLLDLLULDDDRRURRRURDDDLLDUULDLLLUUUUUUDDDDDDDRLRRDRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDRLLRRRURULLLLLLLLLLLLLLRRDLDLRRRDLLDLDLLLUULDDUURRRLLDDRRRRLLLLLRRRRRRURRRUUURDUUUDUULUUUUUDDDDDDDDDDDDDDDDDUUU...

result:

ok Valid Solution (Length = 2848).

Test #59:

score: 0
Accepted
time: 0ms
memory: 3592kb

input:

13 20
11011101111111110111
11111110111010111111
11111111111101011101
10111010101111111010
01011101111111010111
10101011101110101110
01111101010101011111
11111011111110101011
11110111111111011111
11111010101011101011
01111111110101011111
10111010101011111110
11111111110111011101
12 16 1 20

output:

-1

result:

ok No Solution.

Test #60:

score: 0
Accepted
time: 124ms
memory: 42188kb

input:

20 20
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
...

output:

UUUUUUUUUUULLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRDLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRDLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRDLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLD...

result:

ok Valid Solution (Length = 3974).

Test #61:

score: 0
Accepted
time: 60ms
memory: 24464kb

input:

20 20
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
11111111111111111111
10101010101010101010
...

output:

LUUUUUULLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDDRRUDRRUDRRUDRRUDRRUDRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRUDRLDDRRRRRRRRRRRRRRRRRRRLLLLLLLLLUDLLUDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRRUDRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRUDRLDDRRRRRRRRRRRRRRRRRRRLLLLLLLLLUDLLUDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRRUDRLLLLLLLLLL...

result:

ok Valid Solution (Length = 2330).

Test #62:

score: 0
Accepted
time: 27ms
memory: 13464kb

input:

20 20
11111111111111111111
10000000000000000000
11111111111111111111
00000000000000000001
11111111111111111111
10000000000000000000
11111111111111111111
00000000000000000001
11111111111111111111
10000000000000000000
11111111111111111111
00000000000000000001
11111111111111111111
10000000000000000000
...

output:

LLLLLLLLLLUURRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRLLLLLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRDDLLLLLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRDDLLLLLLLRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLL...

result:

ok Valid Solution (Length = 1970).

Test #63:

score: 0
Accepted
time: 0ms
memory: 3808kb

input:

20 20
11110100001010101100
10110001101110101000
01011110111010110000
10111001001011011100
00110111011000010101
01001111110001010010
00101001010111010111
10110100100010001000
10101010001110000010
01111111010110101011
00100101001111000101
00110001001001111000
10101110010001000010
00000100010000110000
...

output:

-1

result:

ok No Solution.

Test #64:

score: 0
Accepted
time: 67ms
memory: 24972kb

input:

20 20
11010001010100101010
11111111111111111111
11000010111011001011
11111111111111111111
10010100111100111110
11111111111111111111
11101100001110000111
11111111111111111111
11010100111101000011
11111111111111111111
11010011111100110100
11111111111111111111
10001011110000111010
11111111111111111111
...

output:

LUDLLDDUUUDLLLUDLLUDLLUDLLLLDDDDUUUUUDRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLDDDDUUULUUDDRDLUUDDDDRRLLLRRRUULRRRRUDRRURRDRLLDLDLLRRRLLLLUDLDRDLLLULLUUDDDRDLDRRLLLLLLLLLLLLLLLLLLLRRRUDRRUDRRRUULLRRRRUUURURURDRRRUDRRUDDUUUUDRDDUULUUDDDDLLLLDLLLDRDLUUDDDLLDRRRRUURRRRUULLRRRRUUUUDLDRDLDLLLLDRDLLLLDDULLLLL...

result:

ok Valid Solution (Length = 2120).

Test #65:

score: 0
Accepted
time: 98ms
memory: 33840kb

input:

20 20
11111111111101111111
11111111111111111101
11111110111110111111
11111011110111111111
11010010110111111011
11111111111111101111
11111111111111111111
11111111111111111001
11111111011110111111
11111111111111111101
11101011111111111111
11111110111111101111
11111111111111111101
10111111111111100111
...

output:

UUUUUUUULLLDLLLLLLLLLLLLLLLLLRRDLLDRRLDRRRRRRRRRRRRRRRRRLDLLLLLLLRRDLLDRRDLLDLRRLRRRUUUDDDDDDDUUUUUUUURRUUUUULLDLRRDRRRLLDULLLRRRRURLLURRRRRRRDRLLLRLLLRDLLLLRRRRURULLLLLLLLLLLLLLRRRRRRDDRRRLLULLRRRLLLDRRDLLLLLDRRRRRUUUDDDDRRDDDUUULRRDUUUUUUUUUUUUDDDDDDLLLLLULLLLLUULLRDDLDLRRRRRRLLLLLLLDRRLLLLLLLLLLL...

result:

ok Valid Solution (Length = 3396).

Test #66:

score: 0
Accepted
time: 0ms
memory: 3692kb

input:

20 20
11010111110101010101
10111010101111101010
11111101111101110111
10101011111010101110
11111111110101111101
10111111111010101111
11110101010111111101
10111110101011101111
01110111011101111101
10111011101010111010
11010111011111010111
11111011101011101111
01010111011111011111
11111010111110111011
...

output:

-1

result:

ok No Solution.

Test #67:

score: 0
Accepted
time: 500ms
memory: 137024kb

input:

30 25
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
1111111111111111111111111
11111111...

output:

UUUUDDDDDDDDDDDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUUUUUUUUUUULLLLLLLLLLLLLLLDRRRRRRRRRRRRRRUUUUUUUUUUUUUUUUUUUUUUUUUUUUUDDLLLLLLLLLLLLLLDRRRRRRRRRRRRRRDLLLLLLLLLLLLLLDRRRRRRRRRRRRRRDLLLLLLLLLLLLLLDRRRRRRRRRRRRRRRRUUUUUDDDDDDDDDDDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUUUUUUUUUUULLLLLLLLLLLLLLLLLLLLLLL...

result:

ok Valid Solution (Length = 7000).

Test #68:

score: 0
Accepted
time: 277ms
memory: 81288kb

input:

30 25
1111111111111111111111111
1010101010101010101010101
1111111111111111111111111
1010101010101010101010101
1111111111111111111111111
1010101010101010101010101
1111111111111111111111111
1010101010101010101010101
1111111111111111111111111
1010101010101010101010101
1111111111111111111111111
10101010...

output:

UUUUUUUUUUUUUUUUDDDDDDDDDDDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUUUUUUUUUUULLLLLLLLLLDDRRUDRRUDRRUDRRUDRLDDLLUDLLUDLLUDLLUDUUUUUUUUUUUUUUUUUUUUUUUUUUUUUDDDDDDRRUDRRUDRRUDRRUDRLDDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRLDDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRLDDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDRLDDLLUDLLUDL...

result:

ok Valid Solution (Length = 3208).

Test #69:

score: 0
Accepted
time: 118ms
memory: 40744kb

input:

30 25
1111111111111111111111111
1000000000000000000000000
1111111111111111111111111
0000000000000000000000001
1111111111111111111111111
1000000000000000000000000
1111111111111111111111111
0000000000000000000000001
1111111111111111111111111
1000000000000000000000000
1111111111111111111111111
00000000...

output:

UURRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRUULLLLRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRUULLLLRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRR...

result:

ok Valid Solution (Length = 3932).

Test #70:

score: 0
Accepted
time: 0ms
memory: 3596kb

input:

30 30
011110110001111010011111110010
011101110110100110001101010100
100100100111010000000011100101
111110001011110110101000100000
100110011100000111100111100010
110011101000111000101110011101
011000001101110100001010011100
001101101010010100111111110011
100010111001110111010110100001
000101010010110...

output:

-1

result:

ok No Solution.

Test #71:

score: 0
Accepted
time: 413ms
memory: 112832kb

input:

30 30
101011111010110011011100010111
111111111111111111111111111111
101000010010011000101010010010
111111111111111111111111111111
101010011110010001011010010101
111111111111111111111111111111
111100010110101001000001000001
111111111111111111111111111111
111101000101101001001000100001
111111111111111...

output:

ULUUUULLLUDDUUUUUDDUUUUUDDUUUUUDDUUUUUDDUUUUUDDUUUUUDRRUDRLLLLLLLLLRRRRURRRRDLLLRRDDRRLLLLLRRLLLLUDLRDUUUUDDDDDLDRRURDDUUUDDRRRDDDDDDDDDDDDDDDDDDDDDDDDDDDDDUUURULLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRUUDDDUUUUUUUDLRRRURDRRRURDRRURRDLDDLLUDLLLLULDRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLRLLLLLL...

result:

ok Valid Solution (Length = 4796).

Test #72:

score: 0
Accepted
time: 651ms
memory: 170992kb

input:

30 30
111111111111111101111111011011
111111100111011111111111101010
111111111111111111111111011111
111111111101111111110111111110
111111111111111011111111111111
111110111111111111111111011111
111111111111111111111111111011
111101111111011111111111111111
111111111111111111111111111111
101110111110111...

output:

UUUUUDDDDDDDDUUUUUUUUUUUUUUUDDDDDDDDUUUUUUUUULULLRRRRRRRLLLLLLLLLLRRRRRRRLLLLLLLLLLLLDLLLLRRRRRLLLLRRRRRDRRRRLLLLLLLLLRRRRLLLLLUUUUUUUUDDDRRRRRRRURRURRDLRRRURDRDLLLLDLLULUUUUUUUUUUUUUUUUUUUDDLLRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLDRRRRDLLLLDRRRUUUDDDDLLLDDRRURRURDDDDDDDDDDDDUURURRLLLLLLLLLLLLLLLLLLLLLLLLLR...

result:

ok Valid Solution (Length = 7884).

Test #73:

score: 0
Accepted
time: 1ms
memory: 3680kb

input:

30 30
110111011111110111011111110101
101110101010111010101011101010
011101111101011101011111010111
111110101110111111111011101110
010101110101011101010101111111
101111101011111111111110101011
111101110111010101011101010101
111011111010101010101010101111
011111011111110101011111111101
111010101111101...

output:

-1

result:

ok No Solution.

Test #74:

score: 0
Accepted
time: 341ms
memory: 97528kb

input:

21 30
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111...

output:

UUUUUUUDDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUULLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLDRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRDLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLUUUUUUUUUUUUUUUUUUUUDDDRRLLL...

result:

ok Valid Solution (Length = 6538).

Test #75:

score: 0
Accepted
time: 184ms
memory: 57384kb

input:

21 30
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101...

output:

LUUUUUUUUUUUUUULLDDRLDDRLDDRLDDRLDDRLDDRLDDRLDDRRUDRRUUUUUUUUUUUUUUUULRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLDDLLUDLLUDLLUDLLUDLLUDLLUDLLUDLLUDLLUDLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLUDLLUDLRDDLRRRUDLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRUDRRUDRRUDRRUDRRUDRRUD...

result:

ok Valid Solution (Length = 3818).

Test #76:

score: 0
Accepted
time: 86ms
memory: 30292kb

input:

21 30
111111111111111111111111111111
100000000000000000000000000000
111111111111111111111111111111
000000000000000000000000000001
111111111111111111111111111111
100000000000000000000000000000
111111111111111111111111111111
000000000000000000000000000001
111111111111111111111111111111
100000000000000...

output:

LLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLL...

result:

ok Valid Solution (Length = 3374).

Test #77:

score: 0
Accepted
time: 0ms
memory: 3604kb

input:

25 30
011010010110010101001110110111
000011111001111101110011010001
011011100010011000110100110000
001111001100100010111111101001
000101111100111001000000001111
001010110011101110101000010000
001010011001010000011001001001
011111010111110110101001110000
011001010011100010100101011000
100011000011110...

output:

-1

result:

ok No Solution.

Test #78:

score: 0
Accepted
time: 272ms
memory: 76532kb

input:

25 30
101100000100000111111100110011
111111111111111111111111111111
100111110101001111010001110011
111111111111111111111111111111
101101100110111111011110101110
111111111111111111111111111111
111001000110101100010101000110
111111111111111111111111111111
100000001011110010001101011010
111111111111111...

output:

UUUUURDDUUUUDDDDDDDUUULDRRLLLLULDRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLURRLLLRRLLLLLDLLLLLLUDLLLLLLULDLLDDDDDUUUUUUUUUUUDDDRRRURRLLLLLRRRRDLLLRDRDRRRLLLLLLULDRRRLLLLLUDDRRDLLDUUUUUUUDDDDDDDDRRRRRRRRUULLLUDLLRRRRRRUUUUUDLRRRUDRRRDDUUURLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRURRRRLDDLLUDLRRRRRRRRRRRRRRRRRRRRRRR...

result:

ok Valid Solution (Length = 5828).

Test #79:

score: 0
Accepted
time: 434ms
memory: 118916kb

input:

25 30
111111101111111111111111111111
111111111111111101111111110111
111111111111101111111111111111
111111111111111101101111111111
011101111111111111111111101111
111011100111111110111110111111
111111110111111111111111111111
111111111111110111111111111111
111111111111111101111111111111
111111111111111...

output:

UDUUUDUUULRRRRRRRLLLLLLDRDLDRDDLDRLRRRLRRURUUUUULLDLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRDRRRRLLLLLDRLDUULLLLRRRRURRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLURRLLLLLLLRRRRRRDRRURRRRRLLLLLLLRRRRRRRRRRRRRLLLLLLLRRRRRRRRRRRRRRRDLLDLLULLLLLLLLDLLULLLLLLDRRRRRRRRRRRLLLLLLDRRLLLLLLRRRRRRRRURRDLDLRRRRRRRRRRRRLLLLLLLL...

result:

ok Valid Solution (Length = 6860).

Test #80:

score: 0
Accepted
time: 0ms
memory: 3748kb

input:

25 30
110101110101011111010101010111
101111101011111011111110101010
110111011101110111111101011101
101011111011101011111111111011
110111111101011111110111111111
111111111110101011111111101010
110101010101010101011111011101
101010111010101111111111101111
111101110111011101011111010111
101010101010111...

output:

-1

result:

ok No Solution.

Test #81:

score: 0
Accepted
time: 715ms
memory: 194116kb

input:

30 30
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111...

output:

UUUUUUUUUUUULLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLDRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRDLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLDRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRDLLLLLLL...

result:

ok Valid Solution (Length = 8976).

Test #82:

score: 0
Accepted
time: 401ms
memory: 111796kb

input:

30 30
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101010101010101010
111111111111111111111111111111
101010101010101...

output:

UULLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLDDRRUDRRUDRRUDRRUDLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRUDRRUDRLDDLLUDLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLUDLLUDLLUDLLUDLLUDDDRRUDRRUDRRUDRRUDLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRUDRRUDRRUUUDLRRRUUUULRRRRRRRRRRRRRRLDD...

result:

ok Valid Solution (Length = 5810).

Test #83:

score: 0
Accepted
time: 147ms
memory: 54616kb

input:

30 30
111111111111111111111111111111
100000000000000000000000000000
111111111111111111111111111111
000000000000000000000000000001
111111111111111111111111111111
100000000000000000000000000000
111111111111111111111111111111
000000000000000000000000000001
111111111111111111111111111111
100000000000000...

output:

RRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRDDRRRRRR...

result:

ok Valid Solution (Length = 4528).

Test #84:

score: 0
Accepted
time: 0ms
memory: 3668kb

input:

30 30
010110110101101010000010000110
101110000111000001001111100101
010100011111100110100001111101
101101100010111011011010001010
100101010100001011101100101100
101001111001111101101100001110
000111101010011110100001110100
111111001101000001011110000111
010000100010000100000011101000
100001010111010...

output:

-1

result:

ok No Solution.

Test #85:

score: 0
Accepted
time: 422ms
memory: 110616kb

input:

30 30
100110101011111011001000111100
111111111111111111111111111111
101001000111011110000110011110
111111111111111111111111111111
111001111110100011111000000010
111111111111111111111111111111
100111001001100000100010001101
111111111111111111111111111111
110001101000111011111010110110
111111111111111...

output:

LRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLUULLUULLDDUUUULLUDDDDUULLUULLLUUUUUUUUUULDDDDDDDDDDDDULDLLLUDDDRRUDRRLLUUDDDLLDRRLLRRRRDLUUUUDDLLLUDDRUUDDLDDRRUURRUUDLDRLDLDLLUDDDRRURURLRRUDRLRRRLLDUUDDLLUDLRRDDLLLLULDDDRRRRDDDDUUUUUDDRRUURRUULRRUDUUUUDDDDRRDRUUUUDDDDLLLLLUUDDLLUDLLULDLLDDDDUUUUUUUUUDDDD...

result:

ok Valid Solution (Length = 4854).

Test #86:

score: 0
Accepted
time: 671ms
memory: 170016kb

input:

30 30
111101111111111111111011111111
100111111111111111111111011111
111111011111111111011111111110
101111111101111111111111111111
111111111111111111111111111111
111111101111011111111110111111
111011111111111111111111111111
111111111111111111111101111111
111111111111111111111111111111
011111100111111...

output:

LUUURUUUULUUUDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUULRRRRLLLLLLLLLRRRRLLLLLLLDLLURRRRLLLDDRLLLLLLLLLLLLLLLLLLLLLLRRRRRDLLLDLLUDDRRRURRRULLLLLLLLLLRRRRRUURRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRDRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLUDDRDLLRUDDRRURURRDLRDUUUUUUUUUUUUDDDDDDLLDDDDDDDDDDDDDDDDDD...

result:

ok Valid Solution (Length = 7734).

Test #87:

score: 0
Accepted
time: 0ms
memory: 3628kb

input:

30 30
011111010101111111011101111101
111011101011111110111111101011
111111010101011101111101110101
111110101011101110111111101110
010111011101110101110101111101
101111101011101110101010111111
110101010101010111011101010101
101110101111101110101110111111
110111011101010111010111110101
101011111110111...

output:

-1

result:

ok No Solution.

Test #88:

score: 0
Accepted
time: 702ms
memory: 195180kb

input:

30 30
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111111111111111111
111111111111111...

output:

LLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRDLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLUUUUUUUUUUUUUUUUUUUUUUUUUUUUUDDLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRDLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRRRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLL...

result:

ok Valid Solution (Length = 8932).

Extra Test:

score: 0
Extra Test Passed