21 lines
429 B
Python
21 lines
429 B
Python
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def test(x):
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sq = 12 * x + 1
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ss = int(sq ** 0.5)
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if ss * ss != sq:
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return False
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if ss % 6 != 5:
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return False
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return True
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def main(limit):
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for d in range(1, limit):
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for n in range(5, limit):
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m = n + d
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a = 3 * (m * m + n * n) - m - n
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b = d * (3 * (m + n) - 1)
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if test(a) and test(b):
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return b // 2
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print(main(1300))
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