Submission #1010384

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010384		thinknoexit	Soccer Stadium (IOI23_soccer)	C++17	1.50 / 100	231 ms	55636 KiB

soccer

#include "soccer.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 2020;
int n;
int f[N][N];
int l[N], r[N];
bool all_can() {
    bool ch = 1;
    for (int i = 1;i <= n;i++) {
        int cnt = 0;
        for (int j = 1;j <= n + 1;j++) {
            cnt += f[i][j - 1] != f[i][j];
            if (f[i][j - 1] != f[i][j]) {
                if (!l[i]) l[i] = j;
                else r[i] = j - 1;
            }
        }
        if (cnt > 2) return 0;
    }
    for (int i = 2;i <= n;i++) {
        if (l[i] <= l[i - 1] && r[i - 1] <= r[i]) continue;
        if (l[i - 1] <= l[i] && r[i] <= r[i - 1]) continue;
        return 0;
    }
    return 1;
}
int biggest_stadium(int NN, vector<vector<int>> F) {
    n = NN;
    int empty_cell = 0;
    for (int i = 1;i <= n;i++) {
        f[0][i] = f[n + 1][i] = f[i][0] = f[i][n + 1] = 1;
        for (int j = 1;j <= n;j++) {
            f[i][j] = F[i - 1][j - 1];
            empty_cell += f[i][j] == 0;
        }
    }// check if all empty cell are regular stadium
    if (all_can()) return empty_cell;
    return 0;
}

Compilation message (stderr)

soccer.cpp: In function 'bool all_can()':
soccer.cpp:10:10: warning: unused variable 'ch' [-Wunused-variable]
   10 |     bool ch = 1;
      |          ^~

• Subtask 0: 0 / 0
• Subtask 1: 1.5 / 6
• Subtask 2: 0 / 8
• Subtask 3: 0 / 22
• Subtask 4: 0 / 18
• Subtask 5: 0 / 16
• Subtask 6: 0 / 30