Submission

Status:

[PPPPPPPPPP]

Subtask/Task Score:

{100/100}

Score: 100

User: zibozzz_23

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-14 01:08:33

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

#define ll long long

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

    ll rest = 4; ll ans = 0;
    for(int i = 1; i <= n; ++i){
        ans += rest;
        rest += 6;
    }
    
    cout << ans << "\n";
}