Submission

Score: 100

User: Catpao

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.002 second

Submitted On: 2025-09-29 09:21:48

#include<bits/stdc++.h>
using namespace std;
int a[1000];
int main()
{
	int n,sum1 = 0;
	cin>>n;
	a[0] = 0;
	a[1] = 4;
	for(int i=1;i<n;i++){
		sum1 = a[i] - a[i-1];
		sum1 = sum1 + 6;
		a[i+1] = sum1 + a[i];
	}
	cout<<a[n];
}