20 lines
340 B
Python
20 lines
340 B
Python
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#!/usr/bin/env python3
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N = 50 * 10 ** 6
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target = 1
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sieve = [0] * N
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m = 3
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while 2*m - 1 < 3*N:
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n = m - 1 - (not m % 2)
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i = (m - n) * (m + n)
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while i < 3*N and n > 0:
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if not i % 3 and not (m - (n//2)) % 3:
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sieve[i//3] += 1
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n -= 2
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i = (m - n) * (m + n)
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m += 1
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print(sieve.count(target))
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