Problem:
Score : 100 points

Problem Statement

Cat Snuke is learning to write characters.
Today, he practiced writing digits 1 and 9, but he did it the other way around.

You are given a three-digit integer n written by Snuke.
Print the integer obtained by replacing each digit 1 with 9 and each digit 9 with 1 in n.

Constraints

111 \leq n \leq 999

n is an integer consisting of digits 1 and 9.

Input

Input is given from Standard Input in the following format:

n

Output

Print the integer obtained by replacing each occurrence of 1 with 9 and each occurrence of 9 with 1 in n.

Sample Input 1

119

Sample Output 1

991

Replace the 9 in the ones place with 1, the 1 in the tens place with 9 and the 1 in the hundreds place with 9. The answer is 991.

Sample Input 2

999

Sample Output 2

111

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;

namespace AtCorder100_A
{
    class Program
    {
        static void Main(string[] args)
        {

            int Input=int.Parse(Console.ReadLine());
            int Output = Input;
            int b = 1;
            for (int i = 2; i >= 0; i--)
            {
                Console.WriteLine("i = "+i);
                int a = Input / b;
                Console.WriteLine("a = " + a);

                switch (a)
                {
                    case 1:
                        Output += 8*b;
                        break;
                    case 9:
                        Output -= 8*b;
                        break;
                }
                b *= 10;
            }
            Console.WriteLine(Output);
        }
    }
}