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

namespace ziyuutyou
{
    class Program
    {
        static void Main(string[] args)
        {
            var str = Console.ReadLine();

            var a = str[0].ToString();
            var b = str[1].ToString();
            var c = str[2].ToString();

            if (a == "1")
            {
                a = "9";
            }
            else
            {
                a = "1";
            }

            if (b == "1")
            {
                b = "9";
            }
            else
            {
                b = "1";
            }
            if(c == "1")
                {
                c = "9";
            }
            else
            {
                c = "1";
            }

            Console.WriteLine("{0}{1}{2}", a, b, c);
        }
    }
}