Clarifications

# When? Question Answer
1 1 day, 17 hours ago J - Judicious XORcery

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

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

...

2 1 day, 17 hours 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.