n = int(input())

res_list = []
cur = n

if cur == 0:
    res_list.insert(0, 0)
else:
    while cur != 0:
        rest = cur % 7
        res_list.insert(0, rest)
        cur = cur // 7
    
str_res_list = [str(e) for e in res_list]
res = ''.join(str_res_list)

print(res)