随笔分类 -  leetcode

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【leetcode】Search in Rotated Sorted Array I&II
摘要：初始版本 题目描述 Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 阅读全文
posted @ 2017-03-29 11:38 mrbean 阅读(229) 评论(0) 推荐(1)
【leetcode】Reverse Bits
摘要：题目描述 Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), 阅读全文
posted @ 2017-03-28 21:08 mrbean 阅读(115) 评论(0) 推荐(0)
【leetcode】Largest Divisible Subset
摘要：题目概述 Given a set of distinct positive integers, find the largest subset such that every pair (Si, Sj) of elements in this subset satisfies: Si % Sj = 阅读全文
posted @ 2017-03-28 11:09 mrbean 阅读(149) 评论(0) 推荐(0)
【leetcode】Missing Number
摘要：题目描述 Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array. For example, Given nums = [ 阅读全文
posted @ 2017-03-25 20:33 mrbean 阅读(121) 评论(0) 推荐(0)
Remove Duplicates from Sorted Array II
摘要：#题目简述Follow up for "Remove Duplicates":What if duplicates are allowed at most twice?For example,Given sorted array nums = [1,1,1,2,2,3],Your function ... 阅读全文
posted @ 2015-08-25 18:37 mrbean 阅读(304) 评论(0) 推荐(0)
【leetcode】Isomorphic Strings
摘要：#题目简述：Given two strings s and t, determine if they are isomorphic.Two strings are isomorphic if the characters in s can be replaced to get t.All occur... 阅读全文
posted @ 2015-05-03 15:55 mrbean 阅读(440) 评论(0) 推荐(0)
【leetcode】Happy Number
摘要：#题目简述Write an algorithm to determine if a number is "happy".A happy number is a number defined by the following process: Starting with any positive in... 阅读全文
posted @ 2015-04-22 11:04 mrbean 阅读(574) 评论(0) 推荐(0)
【leetcode】Valid Sudoku
摘要：#题目简述：Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are fille... 阅读全文
posted @ 2015-04-18 23:43 mrbean 阅读(306) 评论(0) 推荐(0)
【leetcode】Add Binary
摘要：#题目简述：Given two binary strings, return their sum (also a binary string).For example,a = "11"b = "1"Return "100".#解题思路： class Solution: # @pa... 阅读全文
posted @ 2015-04-18 19:10 mrbean 阅读(267) 评论(0) 推荐(0)
【leetcode】Remove Duplicates from Sorted List
摘要：#题目简述Given a sorted linked list, delete all duplicates such that each element appear only once.For example,Given 1->1->2, return 1->2.Given 1->1->2->3... 阅读全文
posted @ 2015-04-18 18:31 mrbean 阅读(229) 评论(0) 推荐(0)
【leetcode】Merge Sorted Array
摘要：#题目描述Given two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space (size that is greater or ... 阅读全文
posted @ 2015-04-18 18:15 mrbean 阅读(255) 评论(0) 推荐(0)
【leetcode】Length of Last Word
摘要：#题目简述Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.If the last ... 阅读全文
posted @ 2015-04-18 16:14 mrbean 阅读(278) 评论(0) 推荐(0)
【leetcode】ZigZag Conversion
摘要：#题目简述The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed ... 阅读全文
posted @ 2015-04-18 15:51 mrbean 阅读(281) 评论(0) 推荐(0)
【leetcode】House Robber
摘要：#题目简述You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stoppi... 阅读全文
posted @ 2015-04-16 16:53 mrbean 阅读(296) 评论(0) 推荐(0)
【leetcode】Minimum Depth of Binary Tree
摘要：#题目简述：Given a binary tree, find its minimum depth.The minimum depth is the number of nodes along the shortest path from the root node down to the near... 阅读全文
posted @ 2015-03-29 21:04 mrbean 阅读(275) 评论(0) 推荐(0)
【leetcode】Path Sum
摘要：#题目简述：Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given ... 阅读全文
posted @ 2015-03-29 20:46 mrbean 阅读(202) 评论(0) 推荐(0)
【leetcode】Pascal's Triangle II
摘要：#题目简述：Given an index k, return the kth row of the Pascal's triangle.For example, given k = 3,Return [1,3,3,1].Note:Could you optimize your algorithm t... 阅读全文
posted @ 2015-03-29 20:11 mrbean 阅读(219) 评论(0) 推荐(0)
【leetcode】Remove Nth Node From End of List
摘要：#题目简述：Given a linked list, remove the nth node from the end of list and return its head.For example, Given linked list: 1->2->3->4->5, and n = 2. ... 阅读全文
posted @ 2015-03-29 19:49 mrbean 阅读(206) 评论(0) 推荐(0)
【leetcode】Valid Palindrome
摘要：#题目简述：Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal... 阅读全文
posted @ 2015-03-29 19:06 mrbean 阅读(233) 评论(0) 推荐(0)
【leetcode】Longest Common Prefix
摘要：#题目简述：Write a function to find the longest common prefix string amongst an array of strings.#解题思路： class Solution: # @return a string ... 阅读全文
posted @ 2015-03-29 18:51 mrbean 阅读(210) 评论(0) 推荐(0)

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