题解 | #牛牛的等差数列#
牛牛的等差数列
https://www.nowcoder.com/practice/fb9daba67b88437a9e501adf020d425e
using System;
public class Program {
public static void Main() {
string[] Num = Console.ReadLine().Split(" ");
int num1 = int.Parse(Num[0]);
int num2 = int.Parse(Num[1]);
Console.WriteLine(num2 + (num2 - num1));
}
}
