Submission

Status:

[PPPPPPPPPP]

Subtask/Task Score:

{100/100}

Score: 100

User: Sun999

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-05 22:17:37

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

int main(){			
	/*
	0 4 14 30 52 80
	 4 10 16 22 28
	  1 2  3  4  5
	
	*/
	
	int t,sum=0;
	cin>>t;
	int x = 4;
	for(int i=0; i<t; i++){
		
		sum+=x;
		x+=6;
	}
	
	
	
	cout<<sum<<'\n';							
	
	
	return 0;
}