Submission

Score: 100

User: pottersk146

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-09 19:48:38

#include <iostream>
#include <algorithm>
using namespace std;
using ll=long long;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll t;
    cin>>t;
    ll cnt=0;
    for (int i=1; i<=t; i++){
        cnt+=6*i-2;
    }
    cout<<cnt;
    return 0;
}