What will I learn?
In this puzzle, you need to compare values and derivatives then memorize this information while traversing a list.
Given a list of numbers, you have to find not the minimal value but the maximal drop. Be careful that a drop can span on several values!
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You sometimes have to take risks buying market shares, and sometimes you have to know when it's time to sell before you lose everything. This is why we propose a little puzzle, to write a program that will do the maths for us, a program in which we can invest all our trust (and money?!).
Don't worry, you won't have to be a market expert, nothing is going to crash.