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 (1.14.1) (judge verdict: Accepted)

package main

import (
	"fmt"
	"strconv"
)

func main() {
	var n string
	fmt.Scan(&n)

	var b [3]rune

	for i, v := range n {
		if v == '1' {
			b[i] = '9'
		} else {
			b[i] = '1'
		}
	}

	ans, _ := strconv.Atoi(string(b[:]))
	fmt.Println(ans)

}