Submission

Score: 0

User: boommmmm

Problemset: ติดตั้งหลอดไฟ

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-17 10:16:12

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

int main()
{
	int n,sum=0,sumall=0;
	cin >> n;
	vector<int> v(n);
	for(int i=0;i<n;i++){
		cin >> v[i];
	}
	for(int i=0;i<n;i++){
		sum+=v[i];
		sumall+=sum*2;
	}
	cout << sumall;
	
	return 0;	
}