package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	scnr := bufio.NewScanner(os.Stdin)
	scnr.Split(bufio.ScanWords)

	for scnr.Scan() {
		var n int
		if x, _ := fmt.Sscanf(scnr.Text(), "%d", &n); x != 1 {
			break
		}

		var ans []int
		for ; n > 0; n /= 7 {
			ans = append(ans, n%7)
		}
		if len(ans) == 0 {
			fmt.Println(0)
		} else {
			for i := len(ans) - 1; i > 0; i-- {
				fmt.Print(ans[i])
			}
			fmt.Println(ans[0])
		}
	}
}