[백준] 2420번 : 사파리월드 - Java(자바)

https://www.acmicpc.net/problem/2420

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        long a=s.nextInt();
        long b=s.nextInt();
        System.out.print(Math.abs(a-b));
    }
}