View Code of Problem 13

import java.util.*;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan=new Scanner(System.in);
		int k,a,b,h;
		int sign=0;
		while(scan.hasNext()){
			h=scan.nextInt();
			a=scan.nextInt();
			b=scan.nextInt();
			k=scan.nextInt();
			sign++;
			if(b>=a && h>a)
				System.out.println("Case #"+sign+": Unknow");
			else if( (k*a<=(k+1)*b) && (k*a>(k-1)*b)  && h>a )
				System.out.println("Case #"+sign+": Unknow");
			else
				System.out.println("Case #"+sign+": White win");
		}
	}

}