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26 lines
403 B
Python
26 lines
403 B
Python
def problem_p02713(input_data):
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def GCD(a, b):
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return a if b == 0 else GCD(b, a % b)
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k = int(eval(input_data))
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ans = 0
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for a in range(1, k + 1):
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for b in range(1, k + 1):
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ab = GCD(a, b)
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if ab == 1:
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ans += k
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continue
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for c in range(1, k + 1):
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ans += GCD(ab, c)
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return ans
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