Submission

Score: 100

User: Sunsblad

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.002 second

Submitted On: 2025-12-13 18:00:47

#include <iostream>

using namespace std;
int main()
{ 
	int x = 0;
	int sum = 0;
	int add = 4;
	cin >> x;
	for (int i = 0; i <x; i++)
	{
		sum += add;
		add = add + 6;
	}
	cout << sum;
}