Submission

Score: 100

User: s0m30n3

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.003 second

Submitted On: 2025-09-18 21:41:05

#include <iostream>
using namespace std;

int main(){
    int n;
    cin >> n;
    int to_plus = 4;
    int ans = 0;
    for (int i=0;i<n;i++){
      ans = ans + to_plus;
      to_plus+=6;
    }
    cout << ans;
}