import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N = int(read())

if N == 0:
    print(0)
    exit()

A = []
while N:
    N,r = divmod(N,7)
    A.append(r)

print(''.join(map(str,A[::-1])))