Submission

Status:

[PPPPPPPPPP]

Subtask/Task Score:

{100/100}

Score: 100

User: Quinruj

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.003 second

Submitted On: 2025-09-17 20:15:35

#include <bits/stdc++.h>
#define ll long long
using namespace std;

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

    int n;cin>>n;
    ll ans = 0;
    for (ll i = 0,a = 4;i<n;i++,a+=6){
        ans += a;
    }
    cout << ans;
}