Introduction
It is very good learning experience to work on those easy level stack algorithms. I finally had time to work on those algorithms one by one. I still remembered that I was told to work on easy level algorithms this June, and I had a coach session with the coach related to next greater element algorithm.
Easy level algorithms
Here is the image to show all easy level algorithms I completed.
Easy level stack algorithm (solved 7/7, shared 7)
20. Valid parentheses
155. Min Stack
225. Implement stack using queues
232. Implement queue using stacks
496. Next great element II
682. Baseball game
844. Backspace string compare
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