Error Although answer & method is correct

,

I was solving a problem which is NONNEGPROD Problem | CodeChef

in this problem, I am supposed to take input inside the array of a given length & with the multiplication of all array elements. I need to print the output that how many elements do I need to remove for multiplication>0.



#include <stdio.h>
int main(void)
{
	int t,n;
	scanf("%d",&t);
	for(int i=0;i<t;i++)
	{
	    scanf("%d",&n);
	    int a[n],mul=1;
	    for(int j=0;j<n;j++)
	    {
	        scanf("%d",&a[j]);
	        mul=mul*a[j];
	    }
	    if(mul<0)
	    {
	        printf("1\n");
	    }
	    else
	    {
	        printf("0\n");
	    }
	}
	return 0;
}

so it was my logic. I am multiplying the array elements while entering them & I compare the final multiplication as if it is less than 0, equal to 0 or grater than 0 but when I submit CodeChef shows me “Wrong Answer” which must be a mistake.