随笔分类 -  Leetcode

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169. Majority Element
摘要：169. Majority Element Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. Y 阅读全文
posted @ 2017-11-07 20:48 绿宝宝怪 阅读(94) 评论(0) 推荐(0)
717. 1-bit and 2-bit Characters
摘要：717. 1-bit and 2-bit Characters We have two special characters. The first character can be represented by one bit 0. The second character can be repre 阅读全文
posted @ 2017-11-07 20:42 绿宝宝怪 阅读(167) 评论(0) 推荐(0)
697. Degree of an Array
摘要：697. Degree of an Array Given a non-empty array of non-negative integers nums, the degree of this array is defined as the maximum frequency of any one 阅读全文
posted @ 2017-11-07 20:25 绿宝宝怪 阅读(158) 评论(0) 推荐(0)
606. Construct String from Binary Tree 二叉树到字符串
摘要：606. Construct String from Binary Tree You need to construct a string consists of parenthesis and integers from a binary tree with the preorder traver 阅读全文
posted @ 2017-10-29 20:15 绿宝宝怪 阅读(140) 评论(0) 推荐(0)
104. Maximum Depth of Binary Tree 二叉树深度
摘要：104. Maximum Depth of Binary Tree Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from th 阅读全文
posted @ 2017-10-29 20:00 绿宝宝怪 阅读(130) 评论(0) 推荐(0)
669. Trim a Binary Search Tree 修剪二叉查找树--递归
摘要：669. Trim a Binary Search Tree Given a binary search tree and the lowest and highest boundaries as L and R, trim the tree so that all its elements lie 阅读全文
posted @ 2017-10-29 19:51 绿宝宝怪 阅读(149) 评论(0) 推荐(0)
122. Best Time to Buy and Sell Stock II 买股票贪心算法
摘要：122. Best Time to Buy and Sell Stock II Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to 阅读全文
posted @ 2017-10-29 19:43 绿宝宝怪 阅读(255) 评论(0) 推荐(0)
617. Merge Two Binary Trees 合并两个二叉树
摘要：617. Merge Two Binary Trees 递归！递归！ 阅读全文
posted @ 2017-10-29 19:12 绿宝宝怪 阅读(188) 评论(0) 推荐(0)
283. Move Zeroes 把0元素移到数组后面
摘要：283. Move Zeroes Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. 阅读全文
posted @ 2017-10-29 18:59 绿宝宝怪 阅读(104) 评论(0) 推荐(0)
448. Find All Numbers Disappeared in an Array 找出数组中未出现的数字
摘要：448. Find All Numbers Disappeared in an Array Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others 阅读全文
posted @ 2017-10-29 18:26 绿宝宝怪 阅读(141) 评论(0) 推荐(0)
234. Palindrome Linked List 判断链表是否出现回文
摘要：234. Palindrome Linked List Given a singly linked list, determine if it is a palindrome. 阅读全文
posted @ 2017-10-29 18:05 绿宝宝怪 阅读(137) 评论(0) 推荐(0)
160. Intersection of Two Linked Lists 找两个链表相交的交点
摘要：160. Intersection of Two Linked Lists Write a program to find the node at which the intersection of two singly linked lists begins. For example, the f 阅读全文
posted @ 2017-10-29 17:00 绿宝宝怪 阅读(143) 评论(0) 推荐(0)
单链表的操作
摘要：单链表的操作 阅读全文
posted @ 2017-10-24 22:00 绿宝宝怪 阅读(169) 评论(0) 推荐(0)
203. Remove Linked List Elements 删除链表中val
摘要：203. Remove Linked List Elements Remove all elements from a linked list of integers that have value val. ExampleGiven: 1 --> 2 --> 6 --> 3 --> 4 --> 5 阅读全文
posted @ 2017-10-24 19:41 绿宝宝怪 阅读(147) 评论(0) 推荐(0)
141. Linked List Cycle 判断链表中是否存在“环”
摘要：141. Linked List Cycle Given a singly linked list, determine if it is a palindrome. Follow up:Could you do it in O(n) time and O(1) space? 快慢指针 阅读全文
posted @ 2017-10-24 18:58 绿宝宝怪 阅读(175) 评论(0) 推荐(0)
21. Merge Two Sorted Lists 合并两个有序链表
摘要：21. Merge Two Sorted Lists Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of th 阅读全文
posted @ 2017-10-24 18:43 绿宝宝怪 阅读(185) 评论(0) 推荐(0)
83. Remove Duplicates from Sorted List 从链表中删去数值重复节点
摘要：83. Remove Duplicates from Sorted List Given a sorted linked list, delete all duplicates such that each element appear only once. For example,Given 1- 阅读全文
posted @ 2017-10-24 18:29 绿宝宝怪 阅读(132) 评论(0) 推荐(0)
206. Reverse Linked List 反转链表
摘要：206. Reverse Linked List Reverse a singly linked list. Hint: A linked list can be reversed either iteratively or recursively. Could you implement both 阅读全文
posted @ 2017-10-24 17:00 绿宝宝怪 阅读(120) 评论(0) 推荐(0)
237. Delete Node in a Linked List 删除链表中的节点
摘要：237. Delete Node in a Linked List 思路：用node节点的下一个节点来覆盖node节点，然后删除node的下一个节点 阅读全文
posted @ 2017-10-24 16:06 绿宝宝怪 阅读(126) 评论(0) 推荐(0)
174. Remove Nth Node From End of List 删除倒数第N个节点
摘要：Given a linked list, remove the nth node from the end of list and return its head. For example, Note:Given n will always be valid.Try to do this in on 阅读全文
posted @ 2017-10-23 14:02 绿宝宝怪 阅读(146) 评论(0) 推荐(0)

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