Clarifications

# When? Question Answer
1 3 weeks, 1 day ago J - Judicious XORcery

The statement of problem J has been updated to explain a detail:

The ⊕ operator refers to bitwise exclusive or (xor).

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2 3 weeks, 1 day ago K - Kekkaishi

For a spirit to be contained, the border of the box must not superpose it?

A spirit on the border of the barrier is considered to be contained in the barrier.