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.
Filter AC, pass DC
Sum of first n terms of a harmonic progression
Find a subset that divides the vector into equal halves
Given a window, how many subsets of a vector sum positive
QWERTY Shift Code Decoder
GJam 2014 China Rd A: Read Phone Number
USC Fall 2012 ACM Question A : Read Input File
Graceful Double Wheel Graph
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