Submission

Score: 100

User: andamanlnwza007

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-01 22:13:21

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main(){
	int t ,sum,n=16;
	cin>>t;
	if (t==1){
		sum=4;
	}
	else if(t==0){
		sum=0;
	}
	else if(t==2){
		sum=14;
	}
	else{
		sum=14;
		for (int i =0 ; i<t-2;i++){
			sum=sum+n;
			n=n+6;
		}
	}
	cout<<sum;
}