Submission

Score: 100

User: ztmy_

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-12 13:20:50

#include <iostream>
using namespace std;

int main(){
    int t;
    int ans = 4;
    int plus = 4;
    cin >> t;
    if (t == 0) {
        cout << 0;
        return 0;
    }
    if (t == 1){
        cout << 4;
        return 0;
    }
    else {
        for (int i = 1; i < t; i++){
            plus += 6;
            ans += plus;
        }
        cout << ans;
    }
}