n\ncount = sum(1 for i in range(1, 50) if i % 7 == 0 or i % 10 == 7) print(count)优化一下

count = sum(1 for i in range(7, 50, 7) if i % 10 != 0) + 4 print(count)

$n\ncount = sum(1 for i in range(1, 50) if i % 7 == 0 or i % 10 == 7) print(count)优化一下$

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