# python


l =input()
l = int(l)
beki =[]
ans = 0
while True:
    a = l % 7
    beki.append(a)
    l = l // 7
    if l / 7 < 7:
        beki.append(l%7)
        for num in range(len(beki)):
            ans += beki[num] * 10**num
        break

print(ans)