this problem could use some nontrivial testcases
give nth decimal place of pi
Project Euler: Problem 6, Natural numbers, squares and sums.
Numbers with prime factors 2, 3 and 5.
Specific Element Count
Reindex a vector
Person of interest?
Dancing with wolves?
How many palindromes?
Simple spirometer - find your lung capacity from the number and size of soap bubbles in one breath
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