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 (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

var in = newIo(bufio.NewScanner(os.Stdin))

func main() {
	var n = in.nextInt()
	print(solve(n))
}

func print(result int) {
	fmt.Println(result)
}

func solve(n int) int {
	return 1110 - n
}

type io struct {
	sc *bufio.Scanner
}

func newIo(sc *bufio.Scanner) *io {
	i := new(io)
	i.sc = sc
	i.sc.Split(bufio.ScanWords)
	return i
}

func (i *io) setSplit(f bufio.SplitFunc) {
	i.sc.Split(f)
}

func (i *io) nextIntSlice(y int, delim string) [][]int {
	result := make([][]int, y)
	for j := 0; j < y; j++ {
		line := i.next()
		result[j] = perseIntSlice(strings.Split(line, delim))
	}
	return result
}

func (i *io) next() string {
	i.sc.Scan()
	return i.sc.Text()
}

func (i *io) nextInt() int {
	return perseInt(i.next())
}

func (i *io) nextLong() int64 {
	return perseLong(i.next())
}

func perseInt(s string) int {
	in, _ := strconv.Atoi(s)
	return in
}

func perseLong(s string) int64 {
	in, _ := strconv.ParseInt(s, 10, 64)
	return in
}

func perseIntSlice(s []string) []int {
	var r = make([]int, len(s))
	for i := 0; i < len(s); i++ {
		r[i] = perseInt(s[i])
	}
	return r
}