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).
give nth decimal place of pi
Back to basics 13 - Input variables
How to add?
Is it an Armstrong number?
Back to basics - mean of corner elements of a matrix
How many monitors are connected ?
Chess ELO rating system
Permute diagonal and antidiagonal
Find indices of diagonal elements
Longest Collatz Sequence
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