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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.nextLine();
      StringBuilder sb = new StringBuilder();
      
      for (int j = 0;j < S.length();j++){
        if(S.charAt(j) == '1') {
          sb.append('9');
        } else if(S.charAt(j) == '9') {
          sb.append('1');
        } else{
          sb.append(S.charAt(j));
        }
      }
      S = sb.toString();
      println(S);
        return ;
    }
    static long getLong(String val) {return Long.parseLong(val);}
    static int getInt(String val) {
        return Integer.parseInt(val);
    }

    static void println(String val){System.out.println(val);};
    static void println(int val){System.out.println(val);};
    static void println(long val){System.out.println(val);};
    static void println(Object val){System.out.println(val);};
}