It appears that Alfonso took 7 minutes to solve this challenge.
very clever simplifications (constant term in linear model is irrelevant, and optimal slope can only take a discrete set of values)
Tobias took at least 2 minutes to solve this challenge with Matlab. An elegant usage of a function and a Matlab optimization function. This solution also crushed the GJam BigDataset in 1.2 seconds.
Check if sorted
Read a Soroban Abacus
Sum the Infinite Series
03 - Matrix Variables 6
Get ranking of a combination
Skyscrapers - Puzzle
Compression: Encode and Decode
Usage of mkdir and copyfile
Mastermind I: Solve all 1296 cases
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