import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner obj = new Scanner(System.in);
int n=obj.nextInt();
int m=obj.nextInt();
int x=obj.nextInt();
int y=obj.nextInt();
int lo=0,ans=0;
int hi=n;
while(lo<=hi)
{
int mid = (lo+hi)/2;
if((mid*x) <= (m +(n-mid)*y))
{ ans=mid;
lo=mid+1;
}
else
{hi=mid-1;}
}
System.out.print(ans);
}
}
3 out of 6 test cases are showing wrong answer.
please tell me the mistake in code above.