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: Accepted)

using System;

namespace a
{
    class Program
    {
        static void Main(string[] args)
        {
            var s = Console.ReadLine().ToCharArray();

            var o = new string[3];
            for(var i = 0; i < 3; i++){                
                if(s[i] == '1'){
                    o[i] = "9";
                }else{
                    o[i] = "1";
                }
            }

            Console.WriteLine(string.Join("",o));
        }
    }
}