A good opportunity to implement a hashtable: lots of collisions without it.
A re-post of Solution 1137054, because that one doesn't appear in the list of solutions, for some reason (I'm not sure why).
Distance walked 2D
Number of 1s in a binary string
Is it an Armstrong number?
Sum of odd numbers in a matrix
How to reverse spdiags?
Without the French accent please!
Expression or variable?
Find the path through the cell
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