12 lines
219 B
Python
12 lines
219 B
Python
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def search(m):
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while True:
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five = m * (3 * m - 1)
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n = int(five ** 0.5)
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if n * (n + 1) == five and n % 2:
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break
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m += 1
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return m * (3 * m - 1) // 2
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print(search(166))
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