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;
using System.Text;
using System.Threading.Tasks;

namespace AABC
{
    class Program
    {
        static void Main(string[] args)
        {
            string kk = Console.ReadLine();
            string[] s = new string[3];
            s[0] = kk.Substring(0, 1);
            s[1] = kk.Substring(1, 1);
            s[2] = kk.Substring(2, 1);

            for(int i = 0; i < 3; i++)
            {
                if(s[i].Equals("1"))
                {
                    s[i] = "9";
                }
                else if(s[i].Equals("9"))
                {
                    s[i] = "1";
                }
                else
                {
                    //何もしない
                }
            }

            int r = int.Parse(s[0])*100 + int.Parse(s[1])*10 + int.Parse(s[2]);
            

            Console.WriteLine(r);

        }
    }
}