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 Go (1.6) (judge verdict: Accepted)

package main

import (
  "fmt"
)

func swapRunes(s string, a, b rune) string {
  runes := []rune(s)
  for i := 0; i < len(runes); i++ {
    if runes[i] == a {
      runes[i] = b
    } else {
      runes[i] = a
    }
  }
  return string(runes)
}

func main() {
  var n string
  fmt.Scan(&n)
  fmt.Println(swapRunes(n, '1', '9'))

}