题解 | #牛牛的等差数列#

解题思路

没啥好说的，看代码

代码实现

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();  //半径
        int b = sc.nextInt();

        System.out.printf("%d",b-a+b);

    }
}