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).
What is the next step in Conway's Life?
Read a column of numbers and interpolate missing data
Spot the outlier
Replicate elements in vectors
Numbers spiral diagonals (Part 1)
Divisors for big integer
Find Missing Number
Mirror, mirror on the wall, who is fairest of them all?
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