Help me in solving MAX_DIFF problem

help
,
1

My issue

My code

#include <iostream>
using namespace std;

int main() {
	// your code goes here
	int t;
	cin>>t;
	while(t--){
	    int n,s;
	    cin>>n>>s;
	    if(n>=s) cout<<s<<endl;
	    else{
	        cout<<abs(n-s)<<endl;
	    }
	}
	return 0;
}

Problem Link: CodeChef: Practical coding for everyone
why the else part not working properly