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20 lines
223 B
Python
20 lines
223 B
Python
def problem_p02833(input_data):
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N = int(eval(input_data))
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if N % 2 == 1:
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return 0
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exit()
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ans = 0
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mod = 10
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while mod <= N:
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ans += N // mod
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mod *= 5
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return ans
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