Help me in solving MINBUY problem

help
, ,
1

My issue

which test case is failing here?

My code

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

int main() {
	// your code goes here
	int t,n,x;
	
	cin>>t;
	while(t--){
	    cin>>n>>x;
	    int arr[n];
	    int brr[n];
	    int sum=0,it=0;
	    
	    for(int i=0;i<n;i++) cin>>arr[i];
	    for(int i=0;i<n;i++) cin>>brr[i];
	     
	    int a[n];   
	    for(int i=0;i<n;i++) a[i]=arr[i]*brr[i];
	    sort(a,a+n);
	   
	    for(int i=n-1;i>=0;i--){
	        sum=sum+a[i];
	        it+=1;
	        if(sum>=x) {
	            cout<<it<<endl;
	            break;
	        }
	   
	    }
	    if (it==n-1) cout<<-1<<endl;
	    
	    
	}

}

Problem Link: Minimum Types Practice Coding Problem