[백준] 10833번 : 사과 - Java(자바)

https://www.acmicpc.net/problem/10833

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