Extract leading non-zero digit
Crossing to Kissing - Untangle the Lines
Sum the Digits of a Number
Diophantine Equations (Inspired by Project Euler, problem 66)
Rubik's Cube: 30 Moves or Less : Contest Scoring (Time/Size/Moves)
Solve Quadratic : No * - or key functions permitted
USC Fall 2012 ACM : Find Largest Water Concentration
USC Fall 2012 ACM: Driving the Rover
Rubik's Cube: Solve Randomized Cube - Score : Moves
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