# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = int(input())
	ans = ""
	while True:
		ans += str(N % 7)
		N = int(N // 7)
		if N == 0:
			break

	print(ans[::-1])


if __name__ == '__main__':
	main()