Submission

Score: 100

User: pakorn

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.002 second

Submitted On: 2026-10-04 14:05:30

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

int main(){
	cin.tie(0)->sync_with_stdio(0);
	vector<long int> s(15);
	// 12  sihaaa kummm
	
	int n,sm = 0,m=4;
	cin >> n;
	for(int i = 0;i <n;i++)
	{
		sm += m;
		m += 6;
	}
	cout << sm;
	return 0;
}