摘要： 题目: Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For 阅读全文

摘要： 题目： Note: This is an extension of House Robber. After robbing those houses on that street, the thief has found himself a new place for his thievery so 阅读全文

摘要： 题目： Design a data structure that supports the following two operations: search(word) can search a literal word or a regular expression string containi 阅读全文

摘要： 题目： Implement a trie with insert, search, and startsWith methods. 链接： http://leetcode.com/problems/implement-trie-prefix-tree/ 7/14/201760%，照着课件代码改写的。 阅读全文

摘要： 题目： There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you ha 阅读全文

摘要： Given an array of n positive integers and a positive integer s, find the minimal length of a contiguous subarray of which the sum ≥ s. If there isn't 阅读全文

摘要： 自己的理解，更全面的需要额外查。 class可以implements Comprable interface，此class也必须有compareTo method，Comparable必须作用在compatible的数据上，否则compareTo会throw ClassCastException。C 阅读全文

该文被密码保护。 阅读全文

摘要： 题目： Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range 阅读全文

摘要： 题目： Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom. For 阅读全文