/*Source

Problem Id:3061  User Id:others_code
Memory:580K  Time:109MS
Language:G++  Result:Accepted

* Source*/

#include<iostream>
using namespace std;
int a[100002];
int main()
{
   int tests;
   int m,n;
  int i,j;
  int sum;

   scanf("%d", &tests);//cin>>tests;~~~~~use scanf to avoid TLE
   while(tests--)
   { 
	   scanf("%d%d", &m, &n);//cin>>m>>n;
	   for(i=0;i<m;i++)
		   scanf("%d", &a[i]);//cin>>a[i];
	   i=0;
	   int min=2147483647;~~~~~use a larger number, 'cause sum maybe large
	   sum=0;
	   j=0;
	   while(j<=i&&i<=m)
	   {
		  
		   if(sum<n) {sum+=a[i];i++;}
          if(sum>=n) {
			   if(i-j<min) min=i-j;
			   sum-=a[j];
                j++;
		  }
	   }
     if(min==2147483647)~~~~it should be in this way
		 cout<<0<<endl;
	 else
	   cout<<min<<endl;
   }
   return 1;
}