Which doors are open?
Right and wrong
Given a window, how many subsets of a vector sum positive
Find the index of n in magic(n)
Find the fastest reaction chain to reach a target compound
Convert a temperature reading from Celsius to an unknown scale
Design a minimum-cost cable network for a power grid
Find an optimal placement of coolers on a grid
Pitting corrosion on a metal plate: Count the number of pits
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