Spookily similar to Problem 381 ("Angle between two vectors")....
Sophie Germain prime
MATCH THE STRINGS (2 CHAR) very easy
What is Sum Of all elements of Matrix
GJam 2014 China Rd B: Sudoku Checker
Criss-Cross: NHL - Optimize Matrix Size
Find Index of maximum Value and maximum Value of a vector
ICFP2021 Hole-In-Wall: Figure Validation with Segment Crossing Check
Compression: Encode and Decode
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