ABC150D

https://gyazo.com/63b89907f3a2e8122ae6c1bfa8ca3e69

Thoughts.

[$ 2 b_i = a_i

$ X = b_k \times (2p + 1)

As for ordinary common multiples, multiplying all of them is a common multiple, but as for antiprime multiples, you're going to have trouble with even numbers included.

Think about specific b values

3 5 → 15

3 9 → 9

If all the numbers are odd, normal common multiples

2 3

Odd multiples of 3 and odd multiples of 2

I don't think so.

Conclusion.

0 if b contains an even number

If not included, find the ordinary least common multiple x, and then the odd multiples of x.

Divide M by x to obtain

I looked at the sample and it looks good.

Official Explanation

This is an error.

0 if >b contains an even number

2 6 -> There is a 6 which is an odd multiple of 2 and an odd multiple of 6

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