B. Groups

原创

whiteawll 2022-08-16 14:41:49 博主文章分类：练习题目 ©著作权

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#include<bits/stdc++.h>

using namespace std;

const int N = 1e3 + 10;

int a[N][N];
int n;

void solve() {
    cin >> n;
    for (int i = 0; i < n; i ++) {
        for (int j = 0; j < 5; j ++)
            cin >> a[i][j];
    } 
    bool f = 0;
    for (int i = 0; i < 5 ; i++) {
        for (int j = 0; j < 5 ;j ++) {
            if (i == j) continue;
            int c1 = 0, c2 = 0, c3 = 0, c4 = 0;
            for (int k = 0; k < n; k ++) {
                if (a[k][j] && a[k][i]) {
                    c4 ++;
                }
                else if (a[k][j] && !a[k][i]) {
                    c1 ++;
                }
                else if (!a[k][j] && a[k][i]) {
                    c2 ++;
                }
                else c3 ++;
            }
            if (!(c3 || c1 > n / 2 || c2 > n / 2)) {
                f = 1;
            }
        }
    }
    if (f)
    puts("YES");
    else puts("NO");
}
int main () {
    int t;
    cin >> t;
    while (t --) solve();
    return 0;
}