摘要：Design a max stack data structure that supports the stack operations and supports finding the stack's maximum element. Implement the MaxStack class: M 阅读全文

摘要：You are given an integer array nums. You want to maximize the number of points you get by performing the following operation any number of times: Pick 阅读全文

摘要：You have a 2-D grid of size m x n representing a box, and you have n balls. The box is open on the top and bottom sides. Each cell in the box has a di 阅读全文