Untitled

Anonymous
plain_text
09/11/2021 3:35 PM
200 B
15
Indexable
def fun(n):
    if n == 1:
        return 'YES'
    if n < 1 or n % 3 != 0:
        return 'NO'
    return fun(n // 3)

q = int(input())
print(fun(q))
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