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).
Remove the air bubbles
Find the hypotenuse
Find nth maximum
Magic is simple (for beginners)
Decrypt the cypher using XOR encryption (for beginners)
Divisors for big integer
Clear all empty variables from the workspace
Without the French accent please!
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