#include <bits/stdc++.h>

using namespace std;

int f(int n) {
    int res = 1;
    for (int i = 1; i <= n; i++) res *= i;
    return res;
}

int main() {
    int s = 0;
    // 1!+2!+3!+4!+5!
    for (int i = 1; i <= 5; i++) s += f(i);
    cout << s << endl;
    return 0;
}