a = int(input("변환할 숫자를 입력하세요:"))
r=[]
while a:
    b=a%3
    a=a//3
    if b == 0:
        r.append(4)
        a = a-1
    else:
        r.append(b)
r.reverse()
u=""
for y in r:
    u+=str(y)
print(u)