Editorial for 校長的Excel


Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.

Author: a002

僅供參考

using namespace std;

int main() {

    int n, p;cin >> n >> p;
    if(n >= p) {
        cout << 0;
        return 0;
    }

    int ans = 1;
    for(int i = 1;i <= n;i++) {
        ans *= i;
        ans %= p;
    }

    cout << ans;

    return 0;

}

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