oj.uz

Submission #1080574

# Submission time Handle Problem Language Result Execution time Memory
1080574 2024-08-29T11:11:38 Z shmax Soccer Stadium (IOI23_soccer) C++17
8 / 100
 4500 ms 600 KB 
#include "soccer.h"
#include "bits/stdc++.h"

using namespace std;
using i32 = int;
#define int long long
#define len(x) (int)(x.size())
#define all(x) x.begin(), x.end()
#define inf 1000'000'000'000'000'000LL
#define bit(x, i) (((x) >> i) & 1)


template<typename T>
using vec = vector<T>;


int check(i32 n, std::vector<std::vector<i32>> F) {
    int cnt = 0;
    set<int> columns;
    set<int> rows;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cnt += F[i][j] == 0;
            if (F[i][j] == 0) {
                rows.insert(i);
                columns.insert(j);
            }
        }
    }

    vec<vec<bool>> used(n, vec<bool>(n, false));
    for (int i = 1; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (used[i][j]) continue;
            if (!F[i][j]) continue;
            if (F[i - 1][j] == 0) {
                for (int k = i; k < n; k++) {
                    if (F[k][j] == 0) return 0;
                    used[k][j] = true;
                }
            }
        }
    }
    used = vec<vec<bool>>(n, vec<bool>(n, false));
    for (int i = 0; i < n; i++) {
        for (int j = 1; j < n; j++) {
            if (used[i][j]) continue;
            if (!F[i][j]) continue;
            if (F[i][j - 1] == 0) {
                for (int k = j; k < n; k++) {
                    if (F[i][k] == 0) return 0;
                    used[i][k] = true;
                }
            }
        }
    }

    vec<vec<int>> pref(n + 1, vec<int>(n + 1, 0));
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            pref[i + 1][j + 1] = pref[i][j + 1] + pref[i + 1][j] - pref[i][j] + F[i][j];
        }
    }

    auto get = [&](int i1, int j1, int i2, int j2) {
        return pref[i2 + 1][j2 + 1] - pref[i2 + 1][j1] - pref[i1][j2 + 1] + pref[i1][j1];
    };

    vec<pair<int, int>> X(n, {inf, -inf});
    vec<pair<int, int>> Y(n, {inf, -inf});
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (F[i][j]) continue;
            X[i].first = min(X[i].first, j);
            X[i].second = max(X[i].first, j);
            Y[j].first = min(Y[j].first, i);
            Y[j].second = max(Y[j].first, i);
        }
    }

    for (int i: rows) {
        for (int j: columns) {
            if (F[i][j] == 0) continue;
            int i1 = Y[j].first;
            int i2 = Y[j].second;
            int j1 = X[i].first;
            int j2 = X[i].second;
            if (get(i1, j1, i2, j2) != 0)
                return 0;
        }
    }

    return cnt;
}

i32 biggest_stadium(i32 n, std::vector<std::vector<i32>> F) {
    int best = 0;
    auto cF = F;
    for (int mask = 0; mask < 1 << (n * n); mask++) {
        F = cF;
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                int id = i * n + j;
                if (bit(mask, id)) F[i][j] = 1;
            }
        }
        best = max(best,check(n,F));
    }
    return best;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4552 ms 348 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #1
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB ok
2 Correct 1 ms 348 KB ok
3 Correct 306 ms 348 KB ok
4 Correct 1 ms 348 KB ok
5 Correct 1 ms 348 KB ok
6 Correct 1 ms 348 KB ok
7 Execution timed out 4509 ms 600 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB ok
2 Correct 1 ms 348 KB ok
3 Correct 1 ms 344 KB ok
4 Correct 1 ms 348 KB ok
5 Correct 1 ms 348 KB ok
6 Correct 1 ms 348 KB ok
7 Correct 1 ms 348 KB ok
8 Correct 1 ms 348 KB ok
9 Correct 1 ms 348 KB ok
10 Correct 1 ms 348 KB ok
11 Correct 1 ms 348 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 1 ms 348 KB ok

Subtask #3
0.0 / 22.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4552 ms 348 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 18.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4552 ms 348 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0.0 / 16.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4552 ms 348 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4552 ms 348 KB Time limit exceeded
2 Halted 0 ms 0 KB -