N = int(input())
N_list = []
while True:
    if N // 7 < 7:
        N_list.append(N % 7)
        N_list.append(N // 7)
        break
    else:
        N_list.append(N % 7)
        N = N // 7

for i in range(len(N_list)-1,-1,-1):
    print(N_list[i],end="")
print()