Submission

Score: 90

User: purihorharin

Problemset: Sigma Croissant

Language: cpp

Time: 0.003 second

Submitted On: 2026-03-20 10:13:52

#include <iostream>
#include <iomanip>
using namespace std;

int main () {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    int n;
    cin >> n;
    double total = 0.0;
    double fac = 1.0;
    for (int i = 1; i <= n; i++) {
        fac *= i;
        total += fac;
    }
    std::cout << setprecision(0) << fixed << total;
}