it is much better than my solution.
Extract leading non-zero digit
Similar Triangles - find the height of the tree
Matrix indexing with two vectors of indices
poll: would you like the regexp (?@cmd) functionality to be banned in Cody?
possible ways through matrix
Yet Another Path Finder
Integer Sequence - 1
Cat, Meowcat and Concatenation
FIFA World Cup 2014 : Offside
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