摘要： 问题描述： Design a class to find the kth largest element in a stream. Note that it is the kth largest element in the sorted order, not the kth distinct el 阅读全文

摘要： 问题描述： Give a string s, count the number of non-empty (contiguous) substrings that have the same number of 0's and 1's, and all the 0's and all the 1's 阅读全文