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摘要： Given an unsorted array of integers, find the length of longest increasing subsequence. For example, Given [10, 9, 2, 5, 3, 7, 101, 18], The longest i 阅读全文

摘要： 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 exam 阅读全文

摘要： 206.Reverse Linked List Reverse a singly linked list. Tips：实现从尾到头打印一个链表。 以下代码包括两张方法： ①使用栈实现，不改变原链表。先读入，后输出。典型的先进后出，可用栈来实现。 ②改变原来链表的指针方向。 阅读全文

摘要： 198.HouseRobber You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constr 阅读全文

摘要： Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Remov 阅读全文

摘要： 72. Edit Distance 72. Edit Distance Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operat 阅读全文

摘要： 62. Unique Paths A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down 阅读全文

摘要： 面试题3 二维数组中的查找 Leetcode--74 Search a 2D Matrix 1 /*Java 2 Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has th 阅读全文

摘要： java如何对ArrayList中对象按照该对象某属性排序 （从小到大） 两种方法： 调用方法： 调用方法： KNNNode结点内的属性： 我想要按照KNNNode的distance属性排序。 若要按照从大到小的顺序排序，如果只是将 >=返回值改为-1 <返回值改为1 会出现异常。 Comparis 阅读全文

摘要： Question： Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives t 阅读全文