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12 lines
208 B
Python
12 lines
208 B
Python
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def to_3(n):
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s = ""
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while n:
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s += str(n % 3)
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n //= 3
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return s[::-1]
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r = 2 * 729**1021 - 2 * 243**1022 + 81**1023 - 2 * 27**1024 - 1025
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s = to_3(r)
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print(s.count("0"))
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