#!/usr/bin/env python3
import sys

def main():
    N = int(input())
    def base10toKint(base10value, toBase):
        ans = []
        p = base10value
        while p >= toBase:
            p, q = divmod(p, toBase)
            ans.append(str(q))
        ans.append(str(p))
        return "".join(ans[::-1])

    num = base10toKint(base10value=N, toBase=7)
    print(num)
if __name__ == '__main__':
    main()