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题目： In a row of seats, 1 represents a person sitting in that seat, and 0 represents that the seat is empty. 在一排座位中，1表示坐在该座位上的人，0表示座位是空的。 There is at l 阅读全文
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题目： Given a binary search tree (BST) with duplicates, find all the mode(s) (the most frequently occurred element) in the given BST. 给定具有重复项的二叉搜索树（BST） 阅读全文
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题目： Given an array consisting of n integers, find the contiguous subarray of given length k that has the maximum average value. And you need to output 阅读全文