https://www.hackerrank.com/challenges/kangaroo

kangaroo.java

import java.util.Scanner;
public class kangaroo {

	public static void main(String[] args) {
		
		Scanner sc=new Scanner(System.in);
		int x1=sc.nextInt();
		int v1=sc.nextInt();
		int x2=sc.nextInt();
		int v2=sc.nextInt();
		
		if((x1>x2 && v1>v2) || (x1<x2 && v1<v2) || (x1!=x2 && v1==v2)|| (x1==x2 && v1!=v2)){
			System.out.println("NO");
		}
		else if(((x1-x2)%(v2-v1))==0){
			System.out.println("YES");
		}
		else{
			System.out.println("NO");
		}
	}
}