NumberLineJumps.java

//You are choreographing a circus show with various animals. 
//For one act, you are given two kangaroos on a number line ready to jump in the positive direction (i.e, toward positive infinity).
//https://www.hackerrank.com/challenges/kangaroo/problem?isFullScreen=true

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    /*
     * Complete the 'kangaroo' function below.
     *
     * The function is expected to return a STRING.
     * The function accepts following parameters:
     *  1. INTEGER x1
     *  2. INTEGER v1
     *  3. INTEGER x2
     *  4. INTEGER v2
     */

    public static String kangaroo(int x1, int v1, int x2, int v2) {
        if(x1 > x2 && v1 > v2 || x2>x1 && v2>v1){
            return "NO";
        } else if((x1 - x2) == 0 || (v2 - v1)==0) {
            return "NO";
        } else if((x1-x2)%(v2-v1)==0){
            return "YES";
        } else {
            return "NO";
        }
    }

}

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

        int x1 = Integer.parseInt(firstMultipleInput[0]);

        int v1 = Integer.parseInt(firstMultipleInput[1]);

        int x2 = Integer.parseInt(firstMultipleInput[2]);

        int v2 = Integer.parseInt(firstMultipleInput[3]);

        String result = Result.kangaroo(x1, v1, x2, v2);

        bufferedWriter.write(result);
        bufferedWriter.newLine();

        bufferedReader.close();
        bufferedWriter.close();
    }
}