#include<stdio.h>
int sum[100001];
int main()
{
	int t,n,s,i,d,b,min,j;
	scanf("%d",&t);
	while(t--)
	{
		b=0;
		scanf("%d%d",&n,&s);
		min=n+1;
		for(i=1;i<=n;i++)
		{
			scanf("%d",&d);
			sum[i]=sum[i-1]+d;
			if(sum[i]-sum[b]>=s)
			{
				if(i-min>b) b=i-min;
				for(j=b+1;j<i;j++)
				{
					if(sum[i]-sum[j]<s) break;
				}
				min=i-j+1;
				b=i-min+1;
			}
		}
		if(min>n) printf("0\n");
		else printf("%d\n",min);
	}
	return 0;
}