Please try to solve a harder version "Problem 44448. Project Euler: Problem 14 Longest Collatz sequence"
Angle between Two Vectors
Find a subset that divides the vector into equal halves
CONVERT TAN TO SIN
Area of an equilateral triangle
Find the path through the cell
Without the French accent please!
Find files with extension ext in the current directory
Numbers spiral diagonals (Part 2)
Recycled Numbers (CodeJam Qualification Round 2012)
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