[백준] 10951번 : A+B-4 - C#

https://www.acmicpc.net/problem/10951

using System;

class Program
{
    static void Main() {
        while(true){
            string s=Console.ReadLine();
            if(s==null) break;
            string[] s1=s.Split(' ');
            int a=int.Parse(s1[0]);
            int b=int.Parse(s1[1]);
            Console.WriteLine(a+b);
        }
    }
}