Problem:
Score : 100 points

Problem Statement

How many hours do we have until New Year at M o'clock (24-hour notation) on 30th, December?

Constraints

1≤M≤23

M is an integer.

Input

Input is given from Standard Input in the following format:

M

Output

If we have x hours until New Year at M o'clock on 30th, December, print x.

Sample Input 1

21

Sample Output 1

27

We have 27 hours until New Year at 21 o'clock on 30th, December.

Sample Input 2

12

Sample Output 2

36

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

namespace kakomon
{
    class Program
    {
        static void Main(string[] args)
        {
            abc084_a();
        }

        static void abc084_a()
        {
            // A - New Year
            int m = int.Parse(Console.ReadLine());
            int ans = 2 * 24 - m;
            Console.WriteLine(ans);
        }
    }
}