题解 | 不要三句号的歪

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String[] str = in.nextLine().split(",");
        int n1 = Integer.parseInt(str[1]);
        long n2 = Long.parseLong(str[3]); //n2会超过int...
        long result = n2-n1-1;
        System.out.println(result);
    }
}