This is (more or less) cribbed from the USC contest winner's solution.
Very fast and very compact solution. Nice usage of complex to calculate distance between points and recursion.
Find common elements in matrix rows
Find the elements of a matrix according to a defined property.
The Answer to Life, the Universe, and Everything
Remove entire row and column in the matrix containing the input values
Create a matrix with difference of each row of input matrix
GJam 2014 China Rd A: Read Phone Number
QWERTY Shift Encoder
USC Spring 2013 ACM: Relief Supplies
Remove NaNs and numbers adjacent to NaNs
GJam 2017 Kickstart: Leader (Small)
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