随笔分类 -  LeetCode

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[LeetCode203]Remove Linked List Elements
摘要：题目： Remove all elements from a linked list of integers that have value val. ExampleGiven: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6Return: 1 --> 阅读全文
posted @ 2016-02-10 18:00 zhangbaochong 阅读(225) 评论(0) 推荐(0)
[LeetCode160]Intersection of Two Linked Lists
摘要：题目： Write a program to find the node at which the intersection of two singly linked lists begins. For example, the following two linked lists: A: a1 → 阅读全文
posted @ 2016-02-10 17:37 zhangbaochong 阅读(429) 评论(0) 推荐(0)
[LeetCode118]Pascal's Triangle
摘要：题目: Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5,Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1 阅读全文
posted @ 2016-02-03 16:53 zhangbaochong 阅读(224) 评论(0) 推荐(0)
[LeetCode228]Summary Ranges
摘要：题目： Given a sorted integer array without duplicates, return the summary of its ranges. For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"]. 代 阅读全文
posted @ 2016-02-03 16:36 zhangbaochong 阅读(294) 评论(0) 推荐(0)
[LeetCode119]Pascal's Triangle II
摘要：题目： 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 @ 2016-02-03 16:13 zhangbaochong 阅读(298) 评论(0) 推荐(0)
[LeetCode122]Best Time to Buy and Sell Stock II
摘要：题目：Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complet... 阅读全文
posted @ 2016-01-26 14:04 zhangbaochong 阅读(265) 评论(0) 推荐(0)
[LeetCode100]Same Tree
摘要：题目：Given two binary trees, write a function to check if they are equal or not.Two binary trees are considered equal if they are structurally identical... 阅读全文
posted @ 2016-01-23 22:27 zhangbaochong 阅读(176) 评论(0) 推荐(0)
[LeetCode226]Invert Binary Tree
摘要：题目：Invert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4 / \ 7 2 / \ / \9 6 3 1反转二叉树，左右儿子值交换代码：/*** Definition for ... 阅读全文
posted @ 2016-01-23 22:18 zhangbaochong 阅读(158) 评论(0) 推荐(0)
[LeetCode24]Swap Nodes in Pairs
摘要：题目：Given a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2->1->4->3.Your al... 阅读全文
posted @ 2016-01-22 19:22 zhangbaochong 阅读(268) 评论(0) 推荐(0)
[LeetCode141]Linked List Cycle
摘要：题目：Given a linked list, determine if it has a cycle in it. 判断一个链表是否有环代码： /** * Definition for singly-linked list. * struct ListNode { * int val;... 阅读全文
posted @ 2016-01-22 17:59 zhangbaochong 阅读(199) 评论(0) 推荐(0)
[LeetCode328]Odd Even Linked List
摘要：题目：Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not ... 阅读全文
posted @ 2016-01-21 22:08 zhangbaochong 阅读(276) 评论(0) 推荐(0)
[LeetCode66]Plus One
摘要：题目：Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit is... 阅读全文
posted @ 2016-01-19 21:18 zhangbaochong 阅读(253) 评论(0) 推荐(0)
[LeetCode217]Contains Duplicate
摘要：题目：Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the ... 阅读全文
posted @ 2016-01-18 22:07 zhangbaochong 阅读(231) 评论(0) 推荐(0)
[LeetCode116]Path Sum
摘要：题目：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 sum... 阅读全文
posted @ 2015-12-24 20:04 zhangbaochong 阅读(205) 评论(0) 推荐(0)
[LeetCode53]Maximum Subarray
摘要：问题：Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array[−2,1,−3,4,−1,2... 阅读全文
posted @ 2015-12-22 22:30 zhangbaochong 阅读(265) 评论(0) 推荐(0)
[LeetCode179]Largest Number
摘要：题目：Given a list of non negative integers, arrange them such that they form the largest number.For example, given[3, 30, 34, 5, 9], the largest formed ... 阅读全文
posted @ 2015-12-21 23:23 zhangbaochong 阅读(202) 评论(0) 推荐(0)
[LeetCode27]Remove Element
摘要：题目：Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn't ... 阅读全文
posted @ 2015-12-20 20:04 zhangbaochong 阅读(240) 评论(0) 推荐(0)
[LeetCode238]Product of Array Except Self
摘要：题目：Given an array ofnintegers wheren> 1,nums, return an arrayoutputsuch thatoutput[i]is equal to the product of all the elements ofnumsexceptnums[i].S... 阅读全文
posted @ 2015-12-20 19:22 zhangbaochong 阅读(311) 评论(0) 推荐(0)
[LeetCode169]Majority Element求一个数组中出现次数大于n/2的数
摘要：题目：Given an array of sizen, find the majority element. The majority element is the element that appears more than⌊ n/2 ⌋times.You may assume that the ... 阅读全文
posted @ 2015-12-20 14:13 zhangbaochong 阅读(306) 评论(0) 推荐(0)
[LeetCode202]Happy Number判断一个数是不是happy number
摘要：题目：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 inte... 阅读全文
posted @ 2015-12-19 20:52 zhangbaochong 阅读(535) 评论(0) 推荐(0)

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