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.
Read a column of numbers and interpolate missing data
Maintain shape of logical-index mask
function on a moving window
Adding and Subtracting UINT variables
Break it up! Break it up!
Kurchan 3x3 - Optimal Score
Spherical radius given four points
PACMAT 07 - Optimized Ghosts, PAC 2X Ghost Speed, 4 Lives; Interactive Download
Create array of all Distances between two Sets of Points : No Neural Network Toolbox
GJam 2014 China Rd A: Read Phone Number
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