12 lines
297 B
Python
12 lines
297 B
Python
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def is_perfect_square(n):
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x = n // 2
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y = set([x])
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while x * x != n:
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x = (x + (n // x)) // 2
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if x in y: return False
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y.add(x)
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return True
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print(is_perfect_square(8))
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print(is_perfect_square(9))
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print(is_perfect_square(100))
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