Help me in solving S100 problem

help
,
1

My issue

include
include
using namespace std;

int main() {
// your code goes here
int y;
cin>>y;
while(y–){
int n,pos;
cin>>n;
string b;
cin>>b;

   for(int i=0;i<n;i++){
       if(b[i]=='1'){
           pos=i;
           break;
       }
   }
   
   for(int i=pos+1;i<n;i++)b[i]='0';
    cout<<b<<endl;
}
return 0;

}

wt is missing here, its saying wrong solution,anyone tell me particular case where it failing

My code

#include <iostream>
#include <string>
using namespace std;

int main() {
	// your code goes here
	int y;
	cin>>y;
	while(y--){
	    int n,pos;
	    cin>>n;
	    string b;
	    cin>>b;
	   
	   for(int i=0;i<n;i++){
	       if(b[i]=='1'){
	           pos=i;
	           break;
	       }
	   }
	   
	   for(int i=pos+1;i<n;i++)b[i]='0';
	    cout<<b<<endl;
	}
	return 0;
}

Problem Link: S100 Problem - CodeChef
wt is missing here, its saying wrong solution,anyone tell me particular case where it failing

2

it should be n-2