Help me in solving PPSCPP108 problem

help
,
1

My issue

what is the error in this ??

My code

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

int main() {
	// your code goes here
    int t,n,x;
    long int b;
    cin>>t;
    while(t--){
        cin>>n>>x;
        b=n*x;
        if(b/10000!=0&&b/10000>0&&b/10000<=1)
        cout<<"YES\n";
        else
        cout<<"NO\n";
    }
}

Learning course: Introduction to C++
Problem Link: Coding problem - 2 Practice Problem in Introduction to C++ - CodeChef

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