摘要： 问题描述 Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more lette 阅读全文

摘要： 347. Top K Frequent Elements Given a non empty array of integers, return the k most frequent elements. For example, Given [1,1,1,2,2,3] and k = 2, ret 阅读全文

摘要： 215. Kth Largest Element in an Array Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, n 阅读全文