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07 2017 档案

• Programming for Everyone !
  摘要：Hello Internet ! This blog is to store my algorithm practices. Since Evernote code blocks do not show indent properly, here I am, back to cnblog. Befo 阅读全文
  posted @ 2017-07-27 22:15 Premiumlab 阅读(243) 评论(1) 推荐(0)
• 73. Set Matrix Zeroes
  摘要：https://leetcode.com/problems/set-matrix-zeroes/tabs/description Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it i 阅读全文
  posted @ 2017-07-27 17:17 Premiumlab 阅读(158) 评论(0) 推荐(0)
• 89. Gray Code
  摘要：https://leetcode.com/problems/gray-code/#/description The gray code is a binary numeral system where two successive values differ in only one bit. Giv 阅读全文
  posted @ 2017-07-27 11:26 Premiumlab 阅读(126) 评论(0) 推荐(0)
• 186. Reverse Words in a String II
  摘要：https://leetcode.com/problems/reverse-words-in-a-string-ii/#/description Given an input string, reverse the string word by word. A word is defined as 阅读全文
  posted @ 2017-07-26 22:03 Premiumlab 阅读(116) 评论(0) 推荐(0)
• 449. Serialize and Deserialize BST
  摘要：https://leetcode.com/problems/serialize-and-deserialize-bst/#/description Serialization is the process of converting a data structure or object into a 阅读全文
  posted @ 2017-07-26 19:15 Premiumlab 阅读(146) 评论(0) 推荐(0)
• 3. Longest Substring Without Repeating Characters
  摘要：https://leetcode.com/problems/longest-substring-without-repeating-characters/#/description Given a string, find the length of the longest substring wi 阅读全文
  posted @ 2017-07-25 22:33 Premiumlab 阅读(200) 评论(0) 推荐(0)
• 2. Add Two Numbers
  摘要：https://leetcode.com/problems/add-two-numbers/#/description You are given two non-empty linked lists representing two non-negative integers. The digit 阅读全文
  posted @ 2017-07-25 17:08 Premiumlab 阅读(138) 评论(0) 推荐(0)
• 240. Search a 2D Matrix II
  摘要：https://leetcode.com/problems/search-a-2d-matrix-ii/#/description Write an efficient algorithm that searches for a value in an m x n matrix. This matr 阅读全文
  posted @ 2017-07-25 16:21 Premiumlab 阅读(100) 评论(0) 推荐(0)
• 5. Longest Palindromic Substring - Unsolved
  摘要：https://leetcode.com/problems/longest-palindromic-substring/#/description Given a string s, find the longest palindromic substring in s. You may assum 阅读全文
  posted @ 2017-07-24 22:29 Premiumlab 阅读(143) 评论(0) 推荐(0)
• 48. Rotate Image
  摘要：https://leetcode.com/problems/rotate-image/#/description You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clock 阅读全文
  posted @ 2017-07-24 21:11 Premiumlab 阅读(126) 评论(0) 推荐(0)
• 138. Copy List with Random Pointer
  摘要：https://leetcode.com/problems/copy-list-with-random-pointer/#/description A linked list is given such that each node contains an additional random poi 阅读全文
  posted @ 2017-07-24 17:45 Premiumlab 阅读(105) 评论(0) 推荐(0)
• 210. Course Schedule II
  摘要：https://leetcode.com/problems/course-schedule-ii/#/description There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses 阅读全文
  posted @ 2017-07-24 16:53 Premiumlab 阅读(138) 评论(0) 推荐(0)
• 274. H-Index
  摘要：https://leetcode.com/problems/h-index/#/description Given an array of citations (each citation is a non-negative integer) of a researcher, write a fun 阅读全文
  posted @ 2017-07-24 11:20 Premiumlab 阅读(107) 评论(0) 推荐(0)
• 286. Walls and Gates
  摘要：https://leetcode.com/problems/walls-and-gates/#/description You are given a m x n 2D grid initialized with these three possible values. -1 - A wall or 阅读全文
  posted @ 2017-07-23 21:47 Premiumlab 阅读(113) 评论(0) 推荐(0)
• 221. Maximal Square
  摘要：https://leetcode.com/problems/maximal-square/#/description Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1 阅读全文
  posted @ 2017-07-21 23:36 Premiumlab 阅读(150) 评论(0) 推荐(0)
• 117. Populating Next Right Pointers in Each Node II
  摘要：https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii/#/description Follow up for problem "Populating Next Right Pointers in Ea 阅读全文
  posted @ 2017-07-21 17:00 Premiumlab 阅读(136) 评论(0) 推荐(0)
• 50. Pow(x, n)
  摘要：https://leetcode.com/problems/powx-n/#/description Implement pow(x, n). Sol: Recursion. Sol 2 : iteration. 阅读全文
  posted @ 2017-07-13 18:21 Premiumlab 阅读(131) 评论(0) 推荐(0)
• 494. Target Sum - Unsolved
  摘要：https://leetcode.com/problems/target-sum/#/description You are given a list of non-negative integers, a1, a2, ..., an, and a target, S. Now you have 2 阅读全文
  posted @ 2017-07-12 23:03 Premiumlab 阅读(198) 评论(0) 推荐(0)
• Word Ladder
  摘要：https://github.com/Premiumlab/Python-for-Algorithms--Data-Structures--and-Interviews/blob/master/Graphs/Word%20Ladder%20Example%20Problem.ipynb BFS. W 阅读全文
  posted @ 2017-07-12 18:13 Premiumlab 阅读(441) 评论(0) 推荐(0)
• 127. Word Ladder
  摘要：https://leetcode.com/problems/word-ladder/#/description Given two words (beginWord and endWord), and a dictionary's word list, find the length of shor 阅读全文
  posted @ 2017-07-12 17:00 Premiumlab 阅读(188) 评论(0) 推荐(0)
• 398. Random Pick Index
  摘要：Given an array of integers with possible duplicates, randomly output the index of a given target number. You can assume that the given target number m 阅读全文
  posted @ 2017-07-12 14:42 Premiumlab 阅读(128) 评论(0) 推荐(0)
• 334. Increasing Triplet Subsequence
  摘要：https://leetcode.com/problems/increasing-triplet-subsequence/#/description Given an unsorted array return whether an increasing subsequence of length 阅读全文
  posted @ 2017-07-12 14:01 Premiumlab 阅读(109) 评论(0) 推荐(0)
• 377. Combination Sum IV
  摘要：https://leetcode.com/problems/combination-sum-iv/#/description Given an integer array with all positive numbers and no duplicates, find the number of 阅读全文
  posted @ 2017-07-12 13:35 Premiumlab 阅读(122) 评论(0) 推荐(0)
• 102. Binary Tree Level Order Traversal
  摘要：Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tree [3 阅读全文
  posted @ 2017-07-12 13:20 Premiumlab 阅读(132) 评论(0) 推荐(0)
• 380. Insert Delete GetRandom O(1)
  摘要：https://leetcode.com/problems/insert-delete-getrandom-o1/#/description Design a data structure that supports all following operations in average O(1)  阅读全文
  posted @ 2017-07-11 22:04 Premiumlab 阅读(114) 评论(0) 推荐(0)
• 90. Subsets II
  摘要：https://leetcode.com/problems/subsets-ii/#/description Given a collection of integers that might contain duplicates, nums, return all possible subsets 阅读全文
  posted @ 2017-07-11 18:39 Premiumlab 阅读(111) 评论(0) 推荐(0)
• 208. Implement Trie (Prefix Tree)
  摘要：https://leetcode.com/problems/implement-trie-prefix-tree/#/description Implement a trie with insert, search, and startsWith methods. Note:You may assu 阅读全文
  posted @ 2017-07-11 18:13 Premiumlab 阅读(115) 评论(0) 推荐(0)
• 33. Search in Rotated Sorted Array
  摘要：https://leetcode.com/problems/search-in-rotated-sorted-array/#/description Suppose an array sorted in ascending order is rotated at some pivot unknown 阅读全文
  posted @ 2017-07-11 12:01 Premiumlab 阅读(133) 评论(0) 推荐(0)
• 71. Simplify Path
  摘要：https://leetcode.com/problems/simplify-path/#/description Given an absolute path for a file (Unix-style), simplify it. For example,path = "/home/", => 阅读全文
  posted @ 2017-07-11 10:35 Premiumlab 阅读(137) 评论(0) 推荐(0)
• 209. Minimum Size Subarray Sum
  摘要：https://leetcode.com/problems/minimum-size-subarray-sum/#/description Given an array of n positive integers and a positive integer s, find the minimal 阅读全文
  posted @ 2017-07-10 22:40 Premiumlab 阅读(117) 评论(0) 推荐(0)
• 215. Kth Largest Element in an Array
  摘要：https://leetcode.com/problems/kth-largest-element-in-an-array/#/description Find the kth largest element in an unsorted array. Note that it is the kth 阅读全文
  posted @ 2017-07-10 21:18 Premiumlab 阅读(293) 评论(0) 推荐(0)
• 238. Product of Array Except Self
  摘要：https://leetcode.com/problems/product-of-array-except-self/#/description Given an array of n integers where n > 1, nums, return an array output such t 阅读全文
  posted @ 2017-07-10 17:06 Premiumlab 阅读(107) 评论(0) 推荐(0)
• 79. Word Search
  摘要：https://leetcode.com/problems/word-search/#/description Given a 2D board and a word, find if the word exists in the grid. The word can be constructed 阅读全文
  posted @ 2017-07-10 16:40 Premiumlab 阅读(114) 评论(0) 推荐(0)
• 49. Group Anagrams
  摘要：https://leetcode.com/problems/group-anagrams/#/description Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "tan 阅读全文
  posted @ 2017-07-09 15:14 Premiumlab 阅读(168) 评论(0) 推荐(0)
• 236. Lowest Common Ancestor of a Binary Tree
  摘要：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/#/description Given a binary tree, find the lowest common ancestor (LCA) of two 阅读全文
  posted @ 2017-07-09 14:33 Premiumlab 阅读(111) 评论(0) 推荐(0)
• 133. Clone Graph
  摘要：Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors. OJ's undirected graph serialization: Nodes are labeled 阅读全文
  posted @ 2017-07-09 12:54 Premiumlab 阅读(145) 评论(0) 推荐(0)
• 43. Multiply Strings
  摘要：https://leetcode.com/problems/multiply-strings/#/description Given two non-negative integers num1 and num2 represented as strings, return the product 阅读全文
  posted @ 2017-07-09 11:13 Premiumlab 阅读(130) 评论(0) 推荐(0)
• 98. Validate Binary Search Tree
  摘要：https://leetcode.com/problems/validate-binary-search-tree/#/description Given a binary tree, determine if it is a valid binary search tree (BST). Assu 阅读全文
  posted @ 2017-07-09 10:26 Premiumlab 阅读(146) 评论(0) 推荐(0)
• 78. Subsets
  摘要：https://leetcode.com/problems/subsets/#/description Given a set of distinct integers, nums, return all possible subsets. Note: The solution set must n 阅读全文
  posted @ 2017-07-08 11:37 Premiumlab 阅读(140) 评论(0) 推荐(0)
• 75. Sort Colors
  摘要：https://leetcode.com/problems/sort-colors/#/description Given an array with n objects colored red, white or blue, sort them so that objects of the sam 阅读全文
  posted @ 2017-07-08 10:48 Premiumlab 阅读(90) 评论(0) 推荐(0)
• 173. Binary Search Tree Iterator
  摘要：https://leetcode.com/problems/binary-search-tree-iterator/#/description Implement an iterator over a binary search tree (BST). Your iterator will be i 阅读全文
  posted @ 2017-07-07 22:12 Premiumlab 阅读(114) 评论(0) 推荐(0)
• 341. Flatten Nested List Iterator
  摘要：https://leetcode.com/problems/flatten-nested-list-iterator/#/description Given a nested list of integers, implement an iterator to flatten it. Each el 阅读全文
  posted @ 2017-07-07 21:01 Premiumlab 阅读(127) 评论(0) 推荐(0)
• 56. Merge Intervals
  摘要：https://leetcode.com/problems/merge-intervals/#/solutions Given a collection of intervals, merge all overlapping intervals. For example,Given [1,3],[2 阅读全文
  posted @ 2017-07-07 17:51 Premiumlab 阅读(118) 评论(0) 推荐(0)
• 139. Word Break
  摘要：https://leetcode.com/problems/word-break/#/description Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, dete 阅读全文
  posted @ 2017-07-07 16:51 Premiumlab 阅读(176) 评论(0) 推荐(0)
• 211. Add and Search Word - Data structure design
  摘要：https://leetcode.com/problems/add-and-search-word-data-structure-design/#/description Design a data structure that supports the following two operatio 阅读全文
  posted @ 2017-07-06 17:21 Premiumlab 阅读(171) 评论(0) 推荐(0)
• 285. Inorder Successor in BST
  摘要：https://leetcode.com/problems/inorder-successor-in-bst/#/description Given a binary search tree and a node in it, find the in-order successor of that 阅读全文
  posted @ 2017-07-06 14:53 Premiumlab 阅读(174) 评论(0) 推荐(0)
• 161. One Edit Distance
  摘要：https://leetcode.com/problems/one-edit-distance/#/description Given two strings S and T, determine if they are both one edit distance apart. Sol: In c 阅读全文
  posted @ 2017-07-06 14:09 Premiumlab 阅读(225) 评论(0) 推荐(0)
• 200. Number of Islands
  摘要：https://leetcode.com/problems/number-of-islands/#/description Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An isl 阅读全文
  posted @ 2017-07-05 21:52 Premiumlab 阅读(175) 评论(0) 推荐(0)
• 277. Find the Celebrity
  摘要：https://leetcode.com/problems/find-the-celebrity/#/description Suppose you are at a party with n people (labeled from 0 to n - 1) and among them, ther 阅读全文
  posted @ 2017-07-05 11:40 Premiumlab 阅读(124) 评论(0) 推荐(0)
• 15. 3Sum
  摘要：https://leetcode.com/problems/3sum/#/description Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all uni 阅读全文
  posted @ 2017-07-03 23:28 Premiumlab 阅读(106) 评论(0) 推荐(0)