rotate the input square matrix by certain degrees (e.g. 270 or 450 etc.) without using rot90 or flip function.
its an extension of problem 798.
Test for balanced parentheses
Increment a number, given its digits
Convert a vector into a number
How long is the longest prime diagonal?
Sum the numbers on the main diagonal
Last non-zero digit
No of squares in a grid
Connect Four - 02
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