Getting wrong answer....!

[chan04_sof]

PROBLEM CODE : WEIGHT .. getting wrong answer.... please help me in finding the mistake.

#include <iostream>
#include <stdio.h>
#include <algorithm>
using namespace std;
int main()
{
	int t;
	scanf("%d",&t);
	while(t--)
	{
		int n;
		scanf("%d",&n);
		long long int a[n],neg,pos;
		neg=pos=0;
		for(int i=0;i<n;i++)
		{
			scanf("%lld",&a[i]);
			if(i!=0)
			{
			if(a[i]<0)
				neg+=(-a[i]);
			else
				pos+=a[i];
			}
		}
    	long long int w,sum=a[0];
	w=1;
	for(int i=1;i<n;i++)
	{
		if(a[i]>=0)
		{
			w++;
			sum+=(a[i]*w);
			pos-=a[i];
		}
		else
		{
			if(pos<neg)
			{
				w=2;
				sum+=(a[i]*w);
				neg+=a[i];
			}
			else
			{
				w++;
				sum+=(a[i]*w);
				neg+=a[i];
			}
		}
	}
	printf("%lld\n",sum);	

}
}