# -*- coding: utf-8 -*-
"""
No.499 7進数変換
https://yukicoder.me/problems/no/499

"""
import sys
from sys import stdin
input = stdin.readline


def solve(N):
    if N == 0:
        return [0]
    ans = []
    while N:
        ans.append(N % 7)
        N //= 7
    ans.reverse()
    return ans


def main(args):
    N = int(input())
    ans = solve(N)
    print(''.join(map(str, ans)))


if __name__ == '__main__':
    main(sys.argv[1:])