Please try to solve a harder version "Problem 44448. Project Euler: Problem 14 Longest Collatz sequence"
Great Circle Distance
Triangle Numbers Below N
Spherical radius given four points
Spot the outlier
Divisible by 2
Mysterious digits operation (easy)
Recycled Numbers (CodeJam Qualification Round 2012)
Return a list sorted by number of consecutive occurrences
Find files with extension ext in the current directory
BLOCK x3 (Version 1)
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