[백준] 2455번 : 지능형 기차 - Java(자바)

https://www.acmicpc.net/problem/2455

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        int sum=0;
        int max=0;
        for(int i=0;i<4;i++){
            int a=s.nextInt();
            int b=s.nextInt();
            sum+=-a+b;
            if(sum>=max) max=sum;
        }
        System.out.print(max);
    }
}