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 Test
    {
        class Program
        {
            static void Main(string[] args)
            {
                Console.WriteLine(48 - int.Parse(Console.ReadLine()));
            }
        }
    }