Count the number of occurrences of "OXO" in rows, columns, diagonals and anti-diagonals.
>> board = ['OOX'
>> board = [' O '
Determine Whether an array is empty
Permute diagonal and antidiagonal
Community Problem 500!
What number has this problem?
Polite numbers. N-th polite number.
Have you solved this problem?
Packing oranges - one layer
How many solutions has this problem?
Polite numbers. Politeness.
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