Submission #1062539

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062539		thinknoexit	Amusement Park (CEOI19_amusementpark)	C++17	0 / 100	0 ms	348 KiB

amusementpark

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int MOD = 998244353;
int a[155], b[155], p[22];
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, m;
    cin >> n >> m;
    for (int i = 1;i <= m;i++) {
        cin >> a[i] >> b[i];
    }
    for (int i = 1;i <= n;i++) p[i] = i;
    int ans = 0;
    do {
        for (int i = 1;i <= m;i++) {
            if (p[a[i]] > p[b[i]]) ans++;
        }
    } while (next_permutation(p + 1, p + 1 + n));
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 12
• Subtask 3: 0 / 23
• Subtask 4: 0 / 21
• Subtask 5: 0 / 37