Submission #2215918

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Source Code Expand

#define _USE_MATH_DEFINES // for C++  
#include "bits/stdc++.h"
using LL = long long;
using ULL = unsigned long long;
#define NUM 1000000007

using namespace std;

int main()
{
    ULL ans = 1;
    int n;
    cin >> n;
    for (size_t i = 1; i <= n; i++)
    {
        ans *= i;
        ans %= NUM;
    }
    cout << ans << endl;
}

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