import math
import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    z = int(input())
    a = ''
    while z != 0:
        a = str(z % 7) + a
        z //= 7
    if a == '':
        a = '0'

    print(a)


if __name__ == '__main__':
    main()