Why is rand out on these ? :)
Sum all integers from 1 to 2^n
How to add?
Getting logical indexes
Numbers spiral diagonals (Part 1)
Find an overlap in the cleaning schedule of two tank reactors
Pitting corrosion on a metal plate: Find the largest pit
Count the number of reaction chains achievable in T mins
Trace the path of a harmful chemical in an ecological network
Count the number of folds needed to pack a large sheet
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