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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#270406#7751. Palindrome Pathucup-team859AC ✓50ms20948kbC++145.0kb2023-11-30 20:23:282023-11-30 20:23:30

Judging History

你现在查看的是最新测评结果

  • [2023-11-30 20:23:30]
  • 评测
  • 测评结果:AC
  • 用时:50ms
  • 内存:20948kb
  • [2023-11-30 20:23:28]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
using namespace chrono;

using ll = long long;
using ull = unsigned long long;

string to_string(const string &s) {
  return '"' + s + '"';
}

string to_string(bool b) {
  return b ? "true" : "false";
}

template <typename A, typename B>
string to_string(const pair<A, B> &p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}

template <typename T>
string to_string(const T &v) {
  string s = "{";
  bool first = true;
  for (const auto &it : v) {
    if (!first)
      s += ", ";
    else
      first = false;
    s += to_string(it);
  }
  return s += "}";
}

void debug_out() {
  cerr << endl;
}

template <typename T, typename... Args>
void debug_out(const T &first, const Args&... rest) {
  cerr << to_string(first) << " ";
  debug_out(rest...);
}

#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

auto startTime = high_resolution_clock::now();
int get_time() {
  auto stopTime = chrono::high_resolution_clock::now();
  auto duration = duration_cast<milliseconds>(stopTime - startTime);
  return duration.count(); // in ms
}

struct usu {
  int x, y, x2, y2;
};

int n, m;
usu tt[31][31][31][31];
int marked[31][31];
int viz[31][31][31][31];
int a[31][31];

const int dx[] = {-1, 1, 0, 0};
const int dy[] = {0, 0, -1, 1};

const int dx2[] = {1, -1, 0, 0};
const int dy2[] = {0, 0, 1, -1};

const int rk[] = {1, 0, 3, 2};

const char ch[] = {'U', 'D', 'L', 'R'};

inline bool in_bounds(int i, int j) {
  return i >= 1 && i <= n && j >= 1 && j <= m && a[i][j];
}

vector<int> dfp;
int nr = 0;
int nrv = 0;
void dfs(int x, int y) {
  vector<int> ordk;
  ordk = {0, 1, 2, 3};
  ++nrv;
  marked[x][y] = nr;
  shuffle(ordk.begin(), ordk.end(), rng);
  for (auto k : ordk) {
    int i = dx[k] + x;
    int j = dy[k] + y;

    if (in_bounds(i, j) && marked[i][j] != nr) {
      dfp.push_back(k);
      dfs(i, j);
      dfp.push_back(rk[k]);
    }
  }
}

void print_path(int x, int y, int x2, int y2) {
  string ans;

  while (viz[x][y][x2][y2] != -1) {
    int k = viz[x][y][x2][y2] - 1;
    ans.push_back(ch[k]);

    auto tmp = tt[x][y][x2][y2];
    x = tmp.x;
    y = tmp.y;
    x2 = tmp.x2;
    y2 = tmp.y2;
  }

  reverse(ans.begin(), ans.end());

  string str;
  for (auto it : dfp)
    str.push_back(ch[it]);

  for (auto it = dfp.rbegin(); it != dfp.rend(); ++it)
    str.push_back(ch[*it]);

  string sol = ans + str;
  reverse(ans.begin(), ans.end());
  sol += ans;

  for (auto it : sol)
    cout << it;
  cout << '\n';
}

void solve() {
  cin >> n >> m;
  for (int i = 1; i <= n; ++i) {
    string s;
    cin >> s;
    for (int j = 1; j <= m; ++j) {
      a[i][j] = s[j - 1] - '0';
    }
  }

  int x, y, x2, y2;
  cin >> x >> y >> x2 >> y2;
  queue<usu> q;
  viz[x][y][x2][y2] = -1;
  q.push({x, y, x2, y2});

  int sx = -1, sy = -1;
  while (!q.empty()) {
    x = q.front().x;
    y = q.front().y;
    x2 = q.front().x2;
    y2 = q.front().y2;
    q.pop();

    for (int k = 0; k < 4; ++k) {
      int i = dx[k] + x;
      int j = dy[k] + y;

      int i2 = dx2[k] + x2;
      int j2 = dy2[k] + y2;

      if (!in_bounds(i, j)) {
        i -= dx[k];
        j -= dy[k];
      }

      if (in_bounds(i2, j2)) {
        if (!viz[i][j][i2][j2]) {
          tt[i][j][i2][j2] = {x, y, x2, y2};
          viz[i][j][i2][j2] = k + 1;
          q.push({i, j, i2, j2});
        }
      }

      i2 = dx[k] + x2;
      j2 = dy[k] + y2;

      if (!in_bounds(i2, j2)) {
        i2 = x2;
        j2 = y2;
        if (!viz[i][j][i2][j2]) {
          tt[i][j][i2][j2] = {x, y, x2, y2};
          viz[i][j][i2][j2] = k + 1;
          q.push({i, j, i2, j2});
        }
      }
    }
  }

  int tot = 0;
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= m; ++j)
      tot += a[i][j];

  for (int i = 1; i <= n; ++i) {
    for (int j = 1; j <= m; ++j) {
      if (a[i][j] == 0)
        continue;
      for (int t = 0; t <= 300; ++t) {
        ++nr;
        dfp.clear();
        dfs(i, j);
        if (nrv != tot)
          break;

        int i2 = i, j2 = j;

        for (auto it : dfp) {
          i2 += dx[it];
          j2 += dy[it];
          if (!in_bounds(i2, j2)) {
            i2 -= dx[it];
            j2 -= dy[it];
          }
        }
        
        for (auto it = dfp.rbegin(); it != dfp.rend(); ++it) {
          i2 += dx[*it];
          j2 += dy[*it];
          if (!in_bounds(i2, j2)) {
            i2 -= dx[*it];
            j2 -= dy[*it];
          }
        }

        if (viz[i][j][i2][j2]) {
          print_path(i, j, i2, j2);
          return;
        }
      }
    }
  }

  cout << "-1\n";
}

int main() {
  cin.tie(NULL);
  ios_base::sync_with_stdio(false);

  int t = 1;
//  cin >> t;
  while (t--)
    solve();

  return 0;
}

这程序好像有点Bug,我给组数据试试?

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 3536kb

input:

2 2
11
11
1 1 2 2

output:

DRUDLUULDURD

result:

ok Valid Solution (Length = 12).

Test #2:

score: 0
Accepted
time: 1ms
memory: 3580kb

input:

2 2
10
01
1 1 2 2

output:

-1

result:

ok No Solution.

Test #3:

score: 0
Accepted
time: 0ms
memory: 3508kb

input:

1 1
1
1 1 1 1

output:



result:

ok Valid Solution (Length = 0).

Test #4:

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

input:

5 4
1111
1111
1111
1111
1111
4 2 4 2

output:

DDDUUUULLDDDDRUUUURDDRDLDRLURUUUDDLUULDDDDLUUUUUUUULDDDDLUULDDUUURULRDLDRDDRUUUURDDDDLLUUUUDDD

result:

ok Valid Solution (Length = 94).

Test #5:

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

input:

5 5
11111
10101
11111
10101
11111
1 4 5 5

output:

DLLLUDDRRDDLLUDRRRRUULRUULLLRDURRDDDDLLUULLUUUULLUULLDDDDRRUDRLLLUURLUURRRRDULLDDRRDDULLLD

result:

ok Valid Solution (Length = 90).

Test #6:

score: 0
Accepted
time: 1ms
memory: 3620kb

input:

5 3
111
100
111
001
111
4 3 3 2

output:

URLLUUDDRRDDLLRRUULLUURRLLLLRRUULLUURRLLDDRRDDUULLRU

result:

ok Valid Solution (Length = 52).

Test #7:

score: 0
Accepted
time: 1ms
memory: 3612kb

input:

5 4
1001
1101
1111
0011
0010
2 2 1 1

output:

ULUDDRUDRDDURUUUDDDLULLUUUULLULDDDUUURUDDRDURDDULU

result:

ok Valid Solution (Length = 50).

Test #8:

score: 0
Accepted
time: 1ms
memory: 3676kb

input:

5 3
101
111
100
111
100
4 1 2 2

output:

URUULLDRRUDLLDDDURRLLUUUUUULLRRUDDDLLDURRDLLUURU

result:

ok Valid Solution (Length = 48).

Test #9:

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

input:

5 5
01110
10110
11110
11011
11100
2 4 5 1

output:

DLDUULRRDDDRLULLLUDDDRRLUDLUURRUDRUULLLLUURDURRUULDULRRDDDULLLULRDDDRRLUUDLD

result:

ok Valid Solution (Length = 76).

Test #10:

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

input:

5 3
011
111
110
111
011
3 1 2 1

output:

ULRULLDRUDLDDDRUDLULUUDDRUUUUUURDDUULULDURDDDLDURDLLURLU

result:

ok Valid Solution (Length = 56).

Test #11:

score: 0
Accepted
time: 1ms
memory: 3708kb

input:

4 5
11111
11111
11111
11111
3 2 1 3

output:

UUULLDDDRURRRDLLRRUULLLURRRLLLDRRRDLLLDLUUUUUULDLLLDRRRDLLLRRRULLLUURRLLDRRRURDDDLLUUU

result:

ok Valid Solution (Length = 86).

Test #12:

score: 0
Accepted
time: 1ms
memory: 3688kb

input:

5 5
11111
10101
11111
10101
11111
2 5 1 1

output:

UUUULLLLDDRRDDLLUDRRRRUUUULLLRDURRDDLRDDLLUULLUUUULLUULLDDRLDDRRUDRLLLUUUURRRRDULLDDRRDDLLLLUUUU

result:

ok Valid Solution (Length = 96).

Test #13:

score: 0
Accepted
time: 1ms
memory: 3540kb

input:

4 5
11111
10000
11111
00001
1 3 4 5

output:

DRRRRLLLLDDRRRRDULLLLUURRRRLLLLLLLLRRRRUULLLLUDRRRRDDLLLLRRRRD

result:

ok Valid Solution (Length = 62).

Test #14:

score: 0
Accepted
time: 0ms
memory: 3440kb

input:

3 5
10100
00010
00111
1 3 1 1

output:

-1

result:

ok No Solution.

Test #15:

score: 0
Accepted
time: 1ms
memory: 3728kb

input:

4 5
10001
11111
11100
11111
4 5 3 1

output:

DLLLLDUUUDRDLDRRRRLLUURRUDLLDDLLURULUULURULLDDLLDURRUULLRRRRDLDRDUUUDLLLLD

result:

ok Valid Solution (Length = 74).

Test #16:

score: 0
Accepted
time: 1ms
memory: 3628kb

input:

3 5
11111
10100
11111
1 2 3 5

output:

RRDLDULLDDRRUULRRRLLDDRRLLLLUUUULLLLRRDDLLRRRLUURRDDLLUDLDRR

result:

ok Valid Solution (Length = 60).

Test #17:

score: 0
Accepted
time: 0ms
memory: 3564kb

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: 3764kb

input:

5 5
11111
11111
11111
11111
11111
1 3 5 2

output:

LLLRDLDRRDLDLUDRRRRULURULURLLDURDRDLDRDLLLURULLURULLURULLURULLLDRDLDRDRUDLLRULURULURRRRDULDLDRRDLDRLLL

result:

ok Valid Solution (Length = 102).

Test #19:

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

input:

5 5
11111
10101
11111
10101
11111
5 1 2 3

output:

UUULULRRRRDDLLUDDDLLUURLUDDDRRRRUDLLUURRUULLLLLLLLUURRUULLDURRRRDDDULRUULLDDDULLDDRRRRLULUUU

result:

ok Valid Solution (Length = 92).

Test #20:

score: 0
Accepted
time: 1ms
memory: 3708kb

input:

5 5
11111
10000
11111
00001
11111
4 5 5 3

output:

ULLDLLDUUDDRRRRDDLLLLRRRRUULLLLUURRRRLLLLLLLLRRRRUULLLLUURRRRLLLLDDRRRRDDUUDLLDLLU

result:

ok Valid Solution (Length = 82).

Test #21:

score: 0
Accepted
time: 0ms
memory: 3468kb

input:

5 5
01010
10101
10101
11001
10011
4 1 5 4

output:

-1

result:

ok No Solution.

Test #22:

score: 0
Accepted
time: 1ms
memory: 3736kb

input:

5 5
10101
11111
10101
11111
11111
3 1 2 4

output:

LUUUDRRRRUDDDDLLLLURRUDRLLLUDDRRRRUUULLUDLLUULLDULLUUURRRRDDULLLRDURRULLLLDDDDURRRRDUUUL

result:

ok Valid Solution (Length = 88).

Test #23:

score: 0
Accepted
time: 1ms
memory: 3692kb

input:

5 5
00001
11111
01110
01111
01111
1 5 5 2

output:

DLDLLDRDLRRRULRDLLULUURLLRDRRURUURURRDRLLRUULULLDRLURRRLDRDLLDLD

result:

ok Valid Solution (Length = 64).

Test #24:

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

input:

5 5
01011
10111
11011
10101
01110
4 1 2 3

output:

-1

result:

ok No Solution.

Test #25:

score: 0
Accepted
time: 1ms
memory: 4532kb

input:

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

output:

UUUUUUURRRRRLLLLLLLDDRDLDRRRRRRURUULLDRLDLLLURRUULLDRLLUDRURRRRRLLLDDLLDRRRUURRDDDDLDLLLLURRRLLLLDDRRRRDLDRRURDUULRUDDLDLLLULDLLURLUUUDDDDRRURDRURULLLLUURDRRRRURUULDLLLLLLURULUUUULURULLLLLLDLUURURRRRDRUULLLLURURDRURRDDDDUUULRULLDLULLLDLDDURLUUDRURRDLDRRRRDDLLLLRRRULLLLDLDDDDRRUURRRDLLDDLLLRRRRRURDUL...

result:

ok Valid Solution (Length = 354).

Test #26:

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

input:

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

output:

LLDLLLRRRRRLDDLLUDDDDDDDDULLUURLUUUUUDRLDDRLDDDDDURRRRRLUURLLRUUUDRLLRDDDDDULLUUUUUURRRLUULLLLLLLLUULRRRUUUUUULLUDDDDDRLLRDUUURLLRUULRRRRRUDDDDDLRDDLRDUUUUULRUULLUDDDDDDDDULLDDLRRRRRLLLDLL

result:

ok Valid Solution (Length = 188).

Test #27:

score: 0
Accepted
time: 1ms
memory: 4092kb

input:

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

output:

RURRRRDUULLLLLLLLLUUDDRRRRRRRRRDDLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLDURRRRRRRRRUULLLLLLLLLUURRRRRRRRRUULLLLLLLLLUURRRRRRRRRLLLLLLLLLLLLLLLLLLRRRRRRRRRUULLLLLLLLLUURRRRRRRRRUULLLLLLLLLUURRRRRRRRRUDLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLDDRRRRRRRRRDDUULLLLLLLLLUUDRRRRUR

result:

ok Valid Solution (Length = 256).

Test #28:

score: 0
Accepted
time: 1ms
memory: 3744kb

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: 0ms
memory: 4112kb

input:

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

output:

LDDLLDLUUUUULDRRRUDRRDDDDLDDRLLLLDDLUUUUUURRRDLDRLDULRURRUDLULLLUDDDDDDDRRURDRRLLULDLUURRRUURUUUULLLLLUULLLLLUUUURUURRRUULDLULLRRDRURRDDDDDDDULLLULDURRURLUDLRDLDRRRUUUUUULDDLLLLRDDLDDDDRRDURRRDLUUUUULDLLDDL

result:

ok Valid Solution (Length = 206).

Test #30:

score: 0
Accepted
time: 1ms
memory: 4268kb

input:

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

output:

LUUURUULLULLRDRRDDLLURLDDLUDDDDDRDRRRUURDDRURUUUUUUULDLDLUDDDRUDRDULLDLLULDDUURRUDLDRDURUUURUUURLLLLRRRDDRURDDDDDDDLDLUULDDLLLLRULUUUURURRUULLLRULLURLLLUURRURUUUULURLLLLDDLUULDLDDDDDDDRURDDRRRLLLLRUUURUUURUDRDLDURRUUDDLULLDLLUDRDURDDDULDLDLUUUUUUURURDDRUURRRDRDDDDDULDDLRULLDDRRDRLLULLUURUUUL

result:

ok Valid Solution (Length = 292).

Test #31:

score: 0
Accepted
time: 1ms
memory: 4264kb

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: 1ms
memory: 4444kb

input:

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

output:

DDDDDUUUUUUURRRRRRRRRLLLLLLLLLRRRDRRDLLLULLDRDLDDDDRURDRUULLURURRDLRDRRDDLULDURDRRURRDLRUULUULUULULLRRRRDDRUUDDDDUULUULLDDDLDRRDULLURUURDDRDDRDLLDLUULLUULLDLDRRDDLULDLUUUURULURRDRRRULLULLLLLLULLURRRDRRULURUUUULDLULDDRRDLDLLUULLUULDLLDRDDRDDRUURULLUDRRDLDDDLLUULUUDDDDUURDDRRRRLLULUULUULUURLDRRURRDRUD...

result:

ok Valid Solution (Length = 376).

Test #33:

score: 0
Accepted
time: 1ms
memory: 4372kb

input:

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

output:

LDLUULLDDDDDDRRDDLLUDDURRDURRUURRRRRLDDLLLRUDDURRRLDUUUUURLUURLUULLDDRLDDDURLLLUULLLRDDDURLLRUUUURRRLDULLLRDDRRRLDDDURRUUUURRRLDDDDDDLLLLLRDDDULLUULLUUUUUUUUUUUULLUULLUDDDRLLLLLDDDDDDLRRRUUUURRUDDDLRRRDDRLLLUDLRRRUUUURLLRUDDDRLLLUULLLRUDDDLRDDLLUULRUULRUUUUUDLRRRUDDURLLLDDLRRRRRUURRUDRRUDDULLDDRRDDD...

result:

ok Valid Solution (Length = 310).

Test #34:

score: 0
Accepted
time: 0ms
memory: 4176kb

input:

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

output:

RDRRRRRDUULLLLLLLLLUUDDRRRRRRRRRDDLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLDURRRRRRRRRUULLLLLLLLLUURRRRRRRRRUULLLLLLLLLUURRRRRRRRRLLLLLLLLLLLLLLLLLLRRRRRRRRRUULLLLLLLLLUURRRRRRRRRUULLLLLLLLLUURRRRRRRRRUDLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLDDRRRRRRRRRDDUULLLLLLLLLUUDRRRRRDR

result:

ok Valid Solution (Length = 258).

Test #35:

score: 0
Accepted
time: 1ms
memory: 3584kb

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: 3804kb

input:

5 10
1001011101
1111111111
1000011001
1111111111
1101110010
4 3 4 7

output:

LLUUURRDDDRRRDRRULRRRRRUULLULDDLUUDLLLLRRUDRRDRUURDRRUDDDLDULLLDLLULLDLRULUUUUUULURLDLLULLDLLLUDLDDDURRDRUURDRRDURRLLLLDUULDDLULLUURRRRRLURRDRRRDDDRRUUULL

result:

ok Valid Solution (Length = 154).

Test #37:

score: 0
Accepted
time: 1ms
memory: 3992kb

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: 0ms
memory: 4352kb

input:

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

output:

DDLLLLLURRRUURRRUDDDDLUDDDDDRURRDUURUURDDRURUUURDRDDLRDDLDLLLULRRLDRRRRLURUUUUUULLLURLLDDDLLLDRDLRULURURULLRUDRDLDRRRUDLUUURDRRRUDDDLULDDDDULDLUULDDLDLLUDDLUUUURUUULRUURLUUURUUUULDDULLDLDDLUULDLUDDDDLULDDDURRRDRUUULDURRRDLDRDURLLURURULURLDRDLLLDDDLLRULLLUUUUUURULRRRRDLRRLULLLDLDDRLDDRDRUUURURDDRUURU...

result:

ok Valid Solution (Length = 334).

Test #39:

score: 0
Accepted
time: 2ms
memory: 4760kb

input:

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

output:

DDUUUUUUUUULLLLLLLLDRURRDLDLLDDRDLDDDRURRRRRUURRRDLLDDRURDDLLLULLLDRRLLLLLRRUDRURRRDRRRUULDLUURRUULLLLDDLULLDLRRLUUULRRDRURURDRURRDLRUUULLLLLDRRRRLLLLDLRUURRRRRDDLLDLULDLDLULDDRRDRUURRRRDLLLDDLLLLLDLUUURULUURRURULLDLUULDLLURURRUULURUUULDLLLLLDDLLLDRRRRUURDRRDDLULDLDLULDLLDDRRRRRUURLDLLLLRRRRDLLLLLUU...

result:

ok Valid Solution (Length = 434).

Test #40:

score: 0
Accepted
time: 0ms
memory: 4428kb

input:

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

output:

UULLLLLLLDDRRRRRRDDRRRLDDLLLLUUUDLLUDLLUDDDRRRLUDDDDULLDUUDRRRRRRUDDURRRLUDDULLLLDUUDLLUULLUURRRRRLDDRRUDRRRLUUUUUURLLLLLDULLDULRRRRRDURRDDLRRLDDLLUULLLLLLUUUULLLLLLUULLDDLRRLDDRRUDRRRRRLUDLLUDLLLLLRUUUUUULRRRDURRDDLRRRRRUULLUULLDUUDLLLLUDDULRRRUDDURRRRRRDUUDLLUDDDDULRRRDDDULLDULLDUUULLLLDDLRRRDDRRR...

result:

ok Valid Solution (Length = 314).

Test #41:

score: 0
Accepted
time: 1ms
memory: 4208kb

input:

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

output:

LLLLLUURRRRRRRRRUULLLLLLLLLUURRRRRRRRRLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLDURRRRRRRRRUULLLLLLLLLUURRRRRRRRRUULLLLLLLLLUUUULLLLLLLLLUURRRRRRRRRUULLLLLLLLLUURRRRRRRRRUDLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLDDRRRRRRRRRDDLLLLLLLLLRRRRRRRRRUULLLLLLLLLUURRRRRRRRRUULLLLL

result:

ok Valid Solution (Length = 274).

Test #42:

score: 0
Accepted
time: 1ms
memory: 3800kb

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: 1ms
memory: 4556kb

input:

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

output:

DRRRUUULUULLURULLLLULRRDDLLDDDRRUULRRRRUUULDDULRURRDRRRULRDLLLULDDDDRRULRRRLLDDLLLLDDLULDLDDRRRRRRRRUURDDUULLURURLDLLDLDULRRURDRDDLLLLLUDLLLUUUDRURDRUURRRRULLULLLDDLLUUUURLDRRUULLLLUURRDLRUUUULLDDLLLULLURRRRUURDRURDUUULLLDULLLLLDDRDRURRLUDLDLLDLRURULLUUDDRUURRRRRRRRDDLDLULDDLLLLDDLLRRRLURRDDDDLULLLD...

result:

ok Valid Solution (Length = 358).

Test #44:

score: 0
Accepted
time: 1ms
memory: 4564kb

input:

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

output:

ULUUURDUULLLRRDDLDDLDRRDDDDRRURRDLRUUULDLLDUUDRRUUULLLRURLUURURDDRRULRRDRDULUURLDLDDDDDDDUURRUDDDDLRUUULLULUUDDRURLUULLUULLRDLDDDRDURDDRDDLLDLLLLUURLUDDDRRUUUULLUUDRUURUULLDUUDLLUURUURDUULLUUUURRDDDULRUULLLLDLLDDRDDRUDRDDDLDRLLUULLUULRURDDUULULLUUURLDDDDURRUUDDDDDDDLDLRUULUDRDRRLURRDDRURUULRURLLLUUU...

result:

ok Valid Solution (Length = 348).

Test #45:

score: 0
Accepted
time: 1ms
memory: 3556kb

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: 0ms
memory: 7688kb

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:

DDDDDDDDDDDDUUUUUUUUUUUUUUUUUUURRRRRRRRRRRLLLLLLLLLLLRDLDDDRUURURRULLRRRRDRDRDRURRUULLLLRDRRLLURRRDDDLDDDLLLUURRDLRULLLLLUURUDRDRLLRULLLDLDDDLDDDDRUURRRURRDLDLDRRRUURDRUULLRRRDDDLLDDRRULRDDDLDRDLDLLDDLLULUURDRDUUURDRUUURLLDLLDLLUUUURRDLDRRURULRDLDLLDUURULLLDDDLDRDRDLLLDLDRRURDRRLUDLULDLLUUUURDRLUUUL...

result:

ok Valid Solution (Length = 1062).

Test #47:

score: 0
Accepted
time: 0ms
memory: 8276kb

input:

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

output:

UUUUUUUULUUUUUULLLLDDDDDDDDRRDDLLUDDDRRUDRRRRRRDDLLUDLLDDLLLLUURRRLUDDULLUDDDDDDURRDURRUDDURRDURRUUUDRRRRDDRRUULRRRUULLDUUURRUUUULLDDDULLUURLLLLLUURRRRRRRRUUUUUULLDDLLLLDDRRRRRLUDDULLDUUDLLLLUULLDDRLDDDDRLLLLRDDLRDURRDURRRRDDLRDDLRDURRRLDUUUUDLRRLDDLLUUUUUDRLLLDUUDLLUDLLUUUURLUURLUURLLLDDLRRLDDDULRR...

result:

ok Valid Solution (Length = 1074).

Test #48:

score: 0
Accepted
time: 3ms
memory: 6940kb

input:

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

output:

UULLLLLLLULLLLLLLLLLLDUURRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRDULLLLLLLLLLLLLLLLLL...

result:

ok Valid Solution (Length = 924).

Test #49:

score: 0
Accepted
time: 1ms
memory: 3464kb

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: 3ms
memory: 8464kb

input:

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

output:

ULLULUUULLLLLLLLLURRUUUULULLUULUDDDRRRRDDDDRDDLLLLLDDRDLDDRURDDDRURRDDLLLLLUURLDDDDRRRULLRRDRRRUURRRRRDDRRRRRRLLLUURRRUULULURURULLDULLUUURURRRLUUUURUULLLULDLLULDDDDRURRRRLDDRLLLLLLLLDDLUULRDDRRURRDRRDDLDRDLLDDRDLDLDULLUURUULDULLLLLDRDRRRLDULLDUULURRUDRRUURRRDRUDLDUULLLDDRRDDRDULLDDLRDURRRRRRRRDLRULU...

result:

ok Valid Solution (Length = 1172).

Test #51:

score: 0
Accepted
time: 7ms
memory: 8652kb

input:

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

output:

UULLLULUDLULLULDRDLDDDDDRURURURDRDDRRRDDDLLDDLUULDLDDRRDLDLDRDRRRRUULLURURURDDRRRRRURUULDLDLLUURDURURURDUUULLURURDUULURUUULLDLULDLDDRDRDRUULULRDRDDLDDDDRLLDRLLDLLLRRUURURULULLLURRRLULURULLRRUULLLDLLDDLLUUULRDRDULDDDLDUUDRURRRUDDRRLLULUUURLDRRURRRRLDDDLDRDLLDLRRRDDUURRLDRDLDLDDRDDUUURURUUUUULULUURURD...

result:

ok Valid Solution (Length = 1186).

Test #52:

score: 0
Accepted
time: 5ms
memory: 6108kb

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: 2ms
memory: 7644kb

input:

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

output:

DDDDDDDDDDDDDUUUUUUUUUUUUULLLLLLLDDDDDRRDLDDRDDDLLDDRURDRUURRDRURDDRURRRDLLRRRURUURUUURULULURRDRRDDLUDDRRDLDLULUDDDDRRRDLLLLUUDDLRRRRRRUULLLRRURUUULUUUURDDDUUUUUULDLDLLULURRRLDULLLDLDDRURDRRDRUDLULLULDLDDDRDDDLDDLULULULURRDRRULULLURUUULLUURDRURDDDDDUUUUURLLDLULLLLLLLLDDRURDRURRDDRDDDRUURULRDLDDLLDDL...

result:

ok Valid Solution (Length = 1182).

Test #54:

score: 0
Accepted
time: 0ms
memory: 8724kb

input:

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

output:

RDDDDDDDDDLLLLLRRDDRRUULRRRRRRRDDRRUULRRRDDRRUULRRRRLDDLRDDDDDDRLLLLLLLUUUURRRRRLDDDURLLLUDDULRRRUUUDLLUDLLLLLLLLUURRRLDUUDLLUDLRDDLLUDDDDDDDRRUULRRRRRDDDDDDLLLLDDRRUDDDLLUDLLLLUUUURRRLUULLDUUURLUURLUURLUUUDLLUURLUDDDDDDDRLDDRLDDDDRLDDDDRLUURLUUUURLUUUUUURLUURRRLDDDDDDDDRRUDRRDURRUUUDRLLRDDRLDULLUDL...

result:

ok Valid Solution (Length = 1186).

Test #55:

score: 0
Accepted
time: 1ms
memory: 4748kb

input:

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

output:

DRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLDUURRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLLDURRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLUUUULLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRUULLLLLLLLL...

result:

ok Valid Solution (Length = 494).

Test #56:

score: 0
Accepted
time: 1ms
memory: 3664kb

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: 3ms
memory: 9336kb

input:

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

output:

LDUULLDDUULDDDDDDUULLLLUUUUUUUUULLLDDDRRURDRRUULLLUDLRRRURLDRRRRRRRRRRRURDDRDRRULUURDULDLRDRDLDDDRDLLLLUURRULLURLLULLDLLLLLUDLRRRUDDDRRUDRRRLDLDLLLLDLULLLLLUURUDRRDRURRDULLDLULLLLULDDDDDRRRUDRRUDRRDDRUURRDDRRDLDDRRDDRURUURRURRDLDRDDLDRDDLLLLUULLLLLLDDRRRRRUDLLLUDLLLLLLLLLLLUURRUURRRRDDLLLRRRRRUULULU...

result:

ok Valid Solution (Length = 1346).

Test #58:

score: 0
Accepted
time: 8ms
memory: 9084kb

input:

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

output:

DLLUUUUUUUUUUUUUUUULLLLLLDDDRDDDRDRURRULULULDDRLUURRRDRRRRRURRDRRRURDRDLLDDDRURDRDLLDLLLLULULURUURLLLLLDRRDDLULLDDRUDDDRUURRDRDLLDDLLULDDRDLLLDRDDDLDRRRURRUUULLDRDLLDUUUDDRRULURRRRULULLRRURURDRRRRRRDRDDLULLDRLDDLLULLURRRULULLDRLURRDRDLLLDLLRDDDLUDLLRRRRRRRRRRURDULLLLLLLURLDRRRRRRUURLDDDLLLLLLLUUURRR...

result:

ok Valid Solution (Length = 1356).

Test #59:

score: 0
Accepted
time: 3ms
memory: 6252kb

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: 9ms
memory: 10552kb

input:

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

output:

UUUUUUUUUUUUUUURRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLRRDDRRDLLLUULDDDRDLDDRDDDRURDDDDLLLURRULLUUUDDDRRDLLDDRRDRURRDLDLLLDLUURLDDDRDLRRRUURRRRDRUURUUULULLURULULDLUUURURUURULULDDDLLULDDRRLDLDRLURULLRUURRLDRRUUUURRDRURURDDDLLDDRRULRRDDRRDDDRRDLLLDLULDLUUURRURDDLLRRUULLULLDRLLLDRRDLRDDUUULLLRURUUDDRURRDRDLL...

result:

ok Valid Solution (Length = 1694).

Test #61:

score: 0
Accepted
time: 8ms
memory: 9004kb

input:

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

output:

UUUUUUUUUUULUUUUURRRRRRRRRRRRRRRRULLLLLLLLLLLLLLDDDDRRUURRRRRRRRDDLLUDLLUDLLLRDDRRUDDDLLLLDDRRDDRRUUUDLRRRDDDDRRRRRRDDLLDDLLLLUURRUDRLDULLLLLLDDDURRUDRLDULLLLLLDUUURRRLDUUULLUUUUUURLUUUDRRRLDUUDLLDDDDRLDDRRDURLUDLLDDDURRRRDURRRLDUUDLLUDLLDDLLDDRRDURRUURRRRUDDDDURRDURRDURRDUUDRRUULRRRDDLRDURLUUUULLLR...

result:

ok Valid Solution (Length = 1292).

Test #62:

score: 0
Accepted
time: 4ms
memory: 7092kb

input:

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

output:

LLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRDDLLLLLLLLL...

result:

ok Valid Solution (Length = 1128).

Test #63:

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

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: 8ms
memory: 8964kb

input:

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

output:

DDDDLLLDDDDDDLLLLLLLLLLDLLLULDRUDDDRRDDLDLDLUURLUUUDDDDDDRDDDLDDRRRRUURRURRDRRRULLUULULLLULDLLRDDRRRRRLLLUDLLLRDDLRUUUURUURRRRURULUURUDDRURUDRRRUDRRRRDDLDRDRDLLULLURULLDDLLLDDDDLUULRUUUURDURURDULDLLDDLRDDDDRRRRRDLDRRRRDDRLLLULDLLDDRRRDDRRRDDLLLUDLLLLLLLLULURRRRRRRDURLUDLLLLLUULLLLLUDLDDDDLLLUUUUUDRD...

result:

ok Valid Solution (Length = 1254).

Test #65:

score: 0
Accepted
time: 3ms
memory: 10016kb

input:

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

output:

UUUUUUUUUUUULLLLLLLLLLULLLRDLDDDDDDRRULURRUURULURRULLLDDDLDUUDRUUURRRRRRDLLDLRDDDRDDDDDLDLDDLUULLLDRRDLDDDDLULDDRRDRRRUURDDRRULUUULURUULDURRDRRURURDDRRURRRUULLLDLDUUURRURDRURRDDLDRDDLLDLDRRRUDDDLDRDLLUULURRLLLUULDDLLURULLUDLLRDDDLULDURDRDRURRDDRRURLULRDDLLLUDLLLRRRRUULLUUDDDLUUUURRRDLDRRUURDDRDRDDRR...

result:

ok Valid Solution (Length = 1492).

Test #66:

score: 0
Accepted
time: 11ms
memory: 8736kb

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: 15ms
memory: 18076kb

input:

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

output:

DDDDDDDDDDDDDDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUUUUUUUUUUULLLLLLLLLLLLLLLLLLLLLLLRDRDDLLUUDRLDDDDRURURURDDLDRDLLUDLDRDDDDRDRDLDDRURRRURRRRRDRRULULLUUULURRRULLLLLUULUURUUURURRDLDRDLLUDDRRRDLDRRRURRDLDDLULLLLLURULLRRDLDRRRRRDDRRDDLDRDDLDRDRURDDRDDRURDRRDLLLLLLULDLULDLDDDRDDRURULURULLDURRRDDDRRURULULDDUURR...

result:

ok Valid Solution (Length = 3150).

Test #68:

score: 0
Accepted
time: 20ms
memory: 15952kb

input:

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

output:

UUUUUUUUUUUUUUULLUUUUUULLLLLLLULRRRRRRRRDDLLUDLLLLLLUDDDRRRRDDRRRRRRRRRRRRDDRRDDDDLLUUUDLLUURLLLDDLLUULLLLLLDDDDDDDDRRUUUUUUUDLRRRUDDDDDRRRRDDRRUULRRRDDRRRRDDLLUDLLUDDDDDRRRRUURRDDDDLLUDLLUDDDLLDDDURRDURRUULRRRDDLRDURRUUUULRUULRUUUULLLRDUUURRDUUUUUUUUULLLLUURRDUUULLLLLLDULLUULLDDDURLLLDULLLLLRDUUDRR...

result:

ok Valid Solution (Length = 2340).

Test #69:

score: 0
Accepted
time: 6ms
memory: 11096kb

input:

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

output:

UURRRRRRRRRRRRRRRRRRRURRRRRDUULLLLLLLLLLLLLLLLLLLLLLLLUULRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLUULRRRRRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRRRRRRDDLLLLLLLLLLLLLLLLLLLLLLLLDDRRRRRRRRRRRRRRRRRRRRRRRRDDLLLLLLLLLL...

result:

ok Valid Solution (Length = 1776).

Test #70:

score: 0
Accepted
time: 2ms
memory: 3960kb

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: 27ms
memory: 17376kb

input:

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

output:

LLULDDLLUUUUUUUUUUUUUUUUUUUUUULLLLLLLLLLLLLLLLLLLLULLLLDDDRRDDRRUULRRRRRDDLUDDDLLDDLDDRRDRURURDRRUUURULLUURRDURUULLLDLUDDDDLRDDRLLLDULRRRUUUUURUUUUDLLULLLLDLLLRUDDURRRRRDULLLURRRRDRRRRRRDDRRRDDLLLDDRRRUDRRRDDLDLULUDLLLDDLLUURLDDRRDDRRRDDRRDDLDDLLLLLLLLLLLLDDRUDDDDDRRRDRDRRRRDDRRRRRULURUURRRDDDRURURU...

result:

ok Valid Solution (Length = 2818).

Test #72:

score: 0
Accepted
time: 37ms
memory: 20296kb

input:

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

output:

UUUUULULUUUUUURUUUUUULLLLLLLLLLLLLLUUURRRRDRRDRDRRDDDLULULDDLDDLLULDLUULDDDDDDRDRRRULLURUULDLRURRDRDRRRDDDLUULLDRDDRDLDDRDLLDLUURUUULDDLDDDLDLDDDDRUURRRDLDDLDLLULDUUUDDRRLDDDLRURRDRRRURURRDRRRDRRRULUURRDLRDRUUURULLLUUUULULLLULDLDLLLDRDRRRDRDRURDDDLLURLLULLDDRRDULUDLLULDLDDLUDRURLURUUURDURLLULLURLLDL...

result:

ok Valid Solution (Length = 3440).

Test #73:

score: 0
Accepted
time: 38ms
memory: 14968kb

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: 32ms
memory: 15052kb

input:

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

output:

DDDDDDDDDDDDDUUUUUUUUUUUUUUUUUUUURRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRDRDDDLLUUUDRDULDDDDRDDRRUULDUULRRUURRURRRRURDDRUURRURRRDLLDDDRDDLLULDDDLLDLUULLLDDLDDLDLUUULLDLUUUDDDDRDLDRDLDDRRURDDRRDLLDLUULLDRDDRRRURRUURRUULLLDLUULLURRRRDLRRURUULUURULRDDRRDDRRRDLLLDLLRUUUDDDDRDLDRDLDRRDRRURRRDLLRRRUUULUUULUUURU...

result:

ok Valid Solution (Length = 2648).

Test #75:

score: 0
Accepted
time: 5ms
memory: 12604kb

input:

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

output:

LUUUUUUUULLLUUUUUULLLLLLLLLLLLLLLLLLLLRRRRRRDDLLUDDDDDLLDDDDDDLLUURLUURLUUUUUURRRLDDLRRLDUUUUDLLUDDDDDRLDDDDDDDDRRUDRRRRUUUURRUULLDULLDDDDLRRLDUUURLLRUULRUDRRUURRUURRRRRRUURRRRUULLDULLLLLLDDDURRDUUDRLLLLLUURLLRDDDULRRRUURRRRDURRRRRRRRDDDDDDRRDDDDLLLLDDDDLLDDDDLLDDRRRRUUUULRRRUULRRRDDRRUUUUUUUUUULRRR...

result:

ok Valid Solution (Length = 1992).

Test #76:

score: 0
Accepted
time: 4ms
memory: 9760kb

input:

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

output:

RURRRRRRRRRRRRDUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUULRRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUULRRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUULD...

result:

ok Valid Solution (Length = 1954).

Test #77:

score: 0
Accepted
time: 2ms
memory: 4444kb

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: 18ms
memory: 14576kb

input:

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

output:

UULUUUUUUUUUUUULLLLLLLLLLLLLLLLLLLLLLLLLLLUUULDDDRRRRURRRULLLLLLRURLDRDURRRRRRDDRDLDRDLDLLLLUUUURDDRRLLUURRLLLDDLLULDLLDDRRULRDRRLLLLDDDDRRDDLDLDRRRRRUULLDUUURDURUURRRUDRDRDRDDRDDRDDRRDDLLUDLLULDLUULLLUURRUUULULRRRLLDDLRURDRRDDLRRLDDRRLLUUUULLDDLLDDLLLDLDLDLDDRURRDRURUURUDRRLLLLDLUDRURDDRRRDDRRDRRRU...

result:

ok Valid Solution (Length = 2308).

Test #79:

score: 0
Accepted
time: 28ms
memory: 17196kb

input:

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

output:

UULLDLLLLLLLDLUUULLLLLLLLDRURRRDRDLDRDRURDRURRULLUURRRRDDLULLRRDDDLLDRRRRDLDLDDDRDDLULLUULLLLDLDDDLULLUURRDLRUUUURRULURRDDDLLDURRRURRURDDLLRRDDUUUURLLDLLUDDLUUULLDLLDDDLLUUUURRULULURRDRDUUULRDDLULLDRDRDLDDDUUULDDDDDDDDDRURDRRDRUUUURRRDLLDDDRRURRDDRRULUURRRRULLURRRRDRDDDDDLDRRRRRURRRRRRDLDRRDDDLDLLLL...

result:

ok Valid Solution (Length = 2854).

Test #80:

score: 0
Accepted
time: 32ms
memory: 13764kb

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: 50ms
memory: 20948kb

input:

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

output:

UUUUUUUUUUUUUUUUUUUUUUUURRRRRRRRRRRRRRRRRRLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRRRRDDDRUURRURDRURRRDRDRRUULLRDURRDRDRURDDDDDLDLUURUULDLULDLULDLDRDDRRDLDDLUULDLLDDRURDRDRURUURRURRDRDLLDLULDDDDLULLDLUULLDLUULDLLDDDDLLURUULLDLULLDRDLDDRURDRDDLLURLLDDDDDDRURRUUULDLDRLUUDRURRURULURRRRUURULULDDDUUURDRRRUDDDDDDLDD...

result:

ok Valid Solution (Length = 3738).

Test #82:

score: 0
Accepted
time: 24ms
memory: 18228kb

input:

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

output:

UUUUUUUUUUUUUUUUUUUDRRRRRRRRRRRRRRRRRRRRRRULLLLLLLLLLLLLLDDRRRRUULLDULRRRRRRRDDLLLRDDDDLLLLUUUDRRDURLUDLLLLUDDDDDDDRRDDDDDDDDDDRRDDRRRRRRDDLLUDLLUDLLDDDDLLDUUUUURLUURLLLDDDDRLDDDURLUUUURLUUUURLUURLUUUUUUUDRLDDRLDDRLDDDDDDRRUDDDDDRLDDRRDURRDURRRRUUUDRRRRRRUUUURRRRDDDDRRRRDDDURRDUUULRRRRLDDLRDURLUUUUR...

result:

ok Valid Solution (Length = 2810).

Test #83:

score: 0
Accepted
time: 4ms
memory: 12480kb

input:

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

output:

RRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLUURRRRRRRRRRRRRRRRRRRRRRRRRRRRRUULLLLLLLLLLLLLLLLLLLLL...

result:

ok Valid Solution (Length = 2724).

Test #84:

score: 0
Accepted
time: 0ms
memory: 3756kb

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: 33ms
memory: 17396kb

input:

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

output:

DRLDDLLLLLLLLLLLLLLLLLLURUUUUUUUUUUUUUUUUUUUURRDRRDDLDDRRRDDLUDLLDDLUUUUUUUDDDDDDDDDDDRRRULULRURRDRRRRRRRDRRURRRRRRUURUURRDDRRRUULDULRRRRUULLLLLDULLLULDLULDLLLLUURRURRDLRRRRRDURRULULUDLLLLURLDLLLDUULDLDLLDDLULDDLLURULUURUDRRUDRRURLDLLLLLLULDURDRDDLLRRRDLDDDDRURRRRRRRRRRRDLDLLDLLULLLDULLLLLLLRRRDURRR...

result:

ok Valid Solution (Length = 2794).

Test #86:

score: 0
Accepted
time: 46ms
memory: 20284kb

input:

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

output:

LUULLULUUUUUUUUUUUULLLLLULULLLLLLLLUUUUULLLLLLLLLDDDDDDRURULRRURDDLRDRUURRURDRRRRULUUULDDLUULDLLLURRLLDDDRLULULDLLRDURUULLRRDRDRURRDRLURURDDDURUURRDDRUURRRDLLDRRRDDDLLLLDRDLLULLDRDDDRURURDRRDDLDRDDDRDRDLDLDLLDLDRDLDRRDDDDDDLULDLLLLLLLURRRRLUULLLLDLLURULLULULUURRDDRRDLRRURRUURURURDRDLDRRUUUURUULLDRLD...

result:

ok Valid Solution (Length = 3458).

Test #87:

score: 0
Accepted
time: 22ms
memory: 3568kb

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: 25ms
memory: 20900kb

input:

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

output:

UUUUUUUUUUUUUUUUUUUUUUUUUUUULLLLLLLLLLLLLLLLLLLLLLLLLLLLLRDDRDRURRDRUULLULLDRLURRRRRRRDDRRDRDLLDLDRDLDDDLLUUUULULLUUDRRRDRURULLURULRDLDRRRLDLDDDDDUUUULULLLLDLULULUUDDDDRDLDRDRUURDDRUURDDRUDDLDLULDLLDRRDRURDDDLLDLLLDRDRURDDLDLULDDRDLDRDLDRRUUURDRRRRDLLLDRDLDRRURDRRDDLULLDLULDLULDLDLUUURURRDLRUUUDDLLL...

result:

ok Valid Solution (Length = 3710).

Extra Test:

score: 0
Extra Test Passed