Submission #1062520

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062520		12345678	Amusement Park (CEOI19_amusementpark)	C++17	0 / 100	0 ms	348 KiB

amusementpark

#include <bits/stdc++.h>

using namespace std;

const int nx=11, mx=1e3+5, mod=998244353;

int n, m, a[mx], b[mx], res;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    for (int i=1; i<=m; i++) cin>>a[i]>>b[i];
    vector<int> v;
    for (int i=1; i<=n; i++) v.push_back(i);
    do
    {
        for (int i=1; i<=m; i++) if (v[a[i]-1]>v[b[i]-1]) res=(res+1)%mod;
    } while (next_permutation(v.begin(), v.end()));
    cout<<res;
}

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