[백준] 1614번 : 영식이의 손가락 - C#

https://www.acmicpc.net/problem/1614

using System;

class Program
{
    static void Main() {
        string s=Console.ReadLine();
        string s1=Console.ReadLine();
        long n=int.Parse(s);
        long m=int.Parse(s1);
        long num=0;
        if(n==1) num+=8*m;
        else if(n==5) num+=8*m+4;
        else{
            if(m%2==1) num+=5-n;
            else num+=n-1;
            num+=4*m;
        }
        Console.Write(num);
    }
}