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#379976#8566. Can We Still Qualify For Semifinals?ucup-team3215#AC ✓5ms3824kbC++233.7kb2024-04-06 20:21:342024-04-06 20:21:34

Judging History

你现在查看的是最新测评结果

  • [2024-04-06 20:21:34]
  • 评测
  • 测评结果:AC
  • 用时:5ms
  • 内存:3824kb
  • [2024-04-06 20:21:34]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

#define all(x) (x).begin(), (x).end()

using pii = array<int, 2>;
using vi = vector<int>;

array<pii, 45> mt;

struct Dinic {
    struct Edge {
        int to, rev;
        int c, oc;

        int flow() { return max(oc - c, 0); }
    };

    vi lvl, ptr, q;
    vector<vector<Edge>> adj;

    Dinic(int n) : lvl(n), ptr(n), q(n), adj(n) {}

    void addEdge(int a, int b, int c, int rcap = 0) {
        adj[a].emplace_back(b, adj[b].size(), c, c);
        adj[b].emplace_back(a, adj[a].size() - 1, rcap, rcap);
    }

    int dfs(int v, int t, int f) {
        if (v == t || !f)return f;
        for (int &i = ptr[v]; i < size(adj[v]); ++i) {
            Edge &e = adj[v][i];
            if (lvl[e.to] == lvl[v] + 1)
                if (int p = dfs(e.to, t, min(f, e.c))) {
                    e.c -= p, adj[e.to][e.rev].c += p;
                    return p;
                }
        }
        return 0;
    }

    int calc(int s, int t) {
        int flow = 0;
        q[0] = s;
        int L = 30;
        do {
            lvl = ptr = vi(size(q));
            int qi = 0, qe = lvl[s] = 1;
            while (qi < qe && !lvl[t]) {
                int v = q[qi++];
                for (auto e: adj[v]) {
                    if (!lvl[e.to] && e.c >> (30 - L))
                        q[qe++] = e.to, lvl[e.to] = lvl[v] + 1;
                }
            }
            while (int p = dfs(s, t, (int) 2e9 + 13))flow += p;
        } while (lvl[t]);
        return flow;
    }

    bool leftOfMinCut(int a) { return lvl[a] != 0; }
};

void solve() {
    int n;
    string s;
    cin >> n >> s;
    vi wold(10);
    for (int i = 0; i < n; ++i) {
        int b = s[i] - '0';
        ++wold[mt[i][b ^ 1]];
    }
    for (int i = n; i < 45; ++i) {
        auto [x, y] = mt[i];
        if (x == 0) {
            ++wold[x];
        }
    }

    for (int a1 = 1; a1 < 10; ++a1) {
        for (int a2 = a1; a2 < 10; ++a2) {
            for (int a3 = a2; a3 < 10; ++a3) {
                vi w(wold);
                vi bst(10);
                bst[a1] = 1;
                bst[a2] = 1;
                bst[a3] = 1;
                Dinic sol(100);
                int val = w[0];
                int nxt = 0;
                bool ok = true;
                for (int i = n; i < 45; ++i) {
                    auto [x, y] = mt[i];
                    if (x == 0 || bst[x] || bst[y]) {
                        continue;
                    }
                    int who = 1 + nxt++;
                    sol.addEdge(0, who, 1);
                    sol.addEdge(who, 50 + x, 1);
                    sol.addEdge(who, 50 + y, 1);
                }
                for (int i = 1; i < 10; ++i) {
                    if (bst[i])continue;
                    if(w[i] <= val)sol.addEdge(50 + i, 90, val-w[i]);
                    else ok=false;
                }
                if (sol.calc(0, 90) == nxt && ok) {
                    cout << "YES\n";
                    return;
                }
            }
        }
    }
    cout << "NO\n";
}

int main() {
    vi p(10);
    iota(all(p), 0);
    for (int i = 0; i < 9; ++i) {
        for (int j = 0; j < 5; ++j) {
            mt[i * 5 + j] = {p[j], p[9 - j]};
        }
        vi pn(p);
        pn[1] = p.back();
        for (int j = 2; j < 10; ++j) {
            pn[j] = p[j - 1];
        }
        p = pn;
    }
    // for (int i = 0; i < 45; ++i) {
    //     if (i % 5 == 0) {
    //         cout << endl;
    //     }
    //     cout << mt[i][0] + 1 << ' ' << mt[i][1] + 1 << endl;
    // }
    int t;
    cin >> t;
    while (t--) {
        solve();
    }
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 3620kb

input:

3
3
111
25
1000010101111111111010100
35
01111011110111101111011110111101111

output:

YES
YES
NO

result:

ok 3 token(s): yes count is 2, no count is 1

Test #2:

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

input:

10
16
0110000001010100
17
01111000110110101
15
001100010101111
16
0010101010011100
19
0000000100010110100
16
0011101010011100
18
011110010001100000
18
000110101001100011
20
01100010000100100100
15
001000111001101

output:

YES
YES
YES
YES
YES
YES
YES
YES
YES
YES

result:

ok 10 token(s): yes count is 10, no count is 0

Test #3:

score: 0
Accepted
time: 3ms
memory: 3792kb

input:

10
37
0110000001010100011101001011100110001
39
000100111101101001100101101000000000100
35
00111000100111100101011010111100100
33
010000010001110010110001101110001
30
000100010100000010010110101010
31
0000101000011010101001010000000
44
00001000000111101011010110000101100011000100
42
01111011110001001...

output:

NO
NO
NO
NO
NO
NO
NO
NO
NO
NO

result:

ok 10 token(s): yes count is 0, no count is 10

Test #4:

score: 0
Accepted
time: 2ms
memory: 3824kb

input:

10
23
01100000010101000111010
38
01111001100011000101011110101001101001
27
010000000001001001110001001
26
01101001110011101101000110
8
00001000
22
0110100110001110110001
9
000100010
24
000000100101101010100100
6
011000
29
01101010100101000000000000100

output:

YES
NO
NO
NO
YES
YES
YES
YES
YES
NO

result:

ok 10 token(s): yes count is 6, no count is 4

Test #5:

score: 0
Accepted
time: 3ms
memory: 3572kb

input:

10
30
011000000101010001110100101110
29
01001010010011101110010110010
28
0110000000001000101101001001
23
01101001110011101101000
23
01000001000111001011000
24
011110001000010001010000
23
01001011010101001000011
30
000110011001010010000000000010
24
000110111001110011000011
28
000110001000011011110110...

output:

NO
NO
NO
YES
YES
YES
YES
NO
YES
NO

result:

ok 10 token(s): yes count is 5, no count is 5

Test #6:

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

input:

10
21
011000000101010001110
21
000110110101001010010
22
0111101101001100101101
24
000000001000101011000101
21
011010011100111011010
20
00110000010001101010
21
010010111100010000100
24
010100000100011010110010
23
00001010000110101010010
25
0000000000001000001101110

output:

YES
YES
YES
YES
YES
YES
YES
YES
YES
YES

result:

ok 10 token(s): yes count is 10, no count is 0

Test #7:

score: 0
Accepted
time: 5ms
memory: 3624kb

input:

10
26
01100000010101000111010010
26
01101010010100100111011100
26
00110010110100000000010010
27
011100010101110010110101101
30
010100011000001000110101001100
30
011110001000010001010000001001
28
0101100101000010100001101010
26
00101000000000000100000110
28
0110101101010000111000110001
27
00011011110...

output:

NO
NO
NO
NO
NO
NO
NO
NO
NO
NO

result:

ok 10 token(s): yes count is 0, no count is 10

Test #8:

score: 0
Accepted
time: 4ms
memory: 3616kb

input:

10
25
0010100010011010111001111
26
01001010100010101010001010
26
01111001110000100111011110
26
10001000100110101110011110
26
10101010100110101110011110
27
110100010101010011010111001
27
101010101001101011100111101
31
1000010001010100110001011011110
37
1000101111000100110000011000000100101
40
1000101...

output:

NO
NO
NO
NO
NO
NO
NO
NO
NO
NO

result:

ok 10 token(s): yes count is 0, no count is 10

Test #9:

score: 0
Accepted
time: 5ms
memory: 3636kb

input:

10
26
00001010000000000000000000
26
00000010000000000000000000
26
01101010100010101011011110
26
00011011110111101111011110
27
001100110101011001110111101
27
000110111101111011110111101
28
0110001001000010011101111011
29
01000000010001101000011110111
29
01000000010000101101011110111
30
01000011110111...

output:

YES
YES
YES
YES
YES
YES
YES
YES
YES
NO

result:

ok 10 token(s): yes count is 9, no count is 1

Test #10:

score: 0
Accepted
time: 1ms
memory: 3632kb

input:

10
1
0
2
00
10
0001101110
14
00101010000011
20
00000010010100101010
25
0000000101000100100001111
35
01110011010000101010000010010000100
40
0000100110001110101100001001000110000001
44
01011010110010101110011000010001010011100011
45
010010001001010011110111101011011000000100001

output:

YES
YES
YES
YES
YES
YES
NO
NO
NO
NO

result:

ok 10 token(s): yes count is 6, no count is 4

Extra Test:

score: 0
Extra Test Passed