Test if a Number is a Palindrome without using any String Operations
Is this matrix orthogonal?
Non-zero bits in 10^n.
Negation the hard way
Unique: Enhanced Performance - Large and Wide Array - Speed Improvement (66% savings)
GJam 2014 Rd 1c: Reordering Train Cars (Large)
Binpack Contest: Retro
USC Fall 2012 ACM: Rover Maze
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