随笔分类 -  leetcode

leetcode-6-ZigZag Conversion
摘要：题目：ZigZag Conversion The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pat 阅读全文
posted @ 2018-06-03 16:34 pathjh 阅读(161) 评论(0) 推荐(0)
leetcode-4-Median of Two Sorted Arrays
摘要：题目：Median of Two Sorted Arrays There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The 阅读全文
posted @ 2018-05-27 22:28 pathjh 阅读(149) 评论(0) 推荐(0)
在两排序数组中寻找第K小的数
摘要：题目：在两个排序数组中寻找第K小的数 举例： arr1=[1,2,3,4,5],arr2=[3,4,5],k=1 1是所有数中第一小的数，所以返回1 arr1=[1,2,3],arr2=[3,4,5,6],k=4 3是所有数中第4小的数，所以返回3 要求：如果arr1的长度为N，arr2的长度为M, 阅读全文
posted @ 2018-05-27 21:33 pathjh 阅读(4346) 评论(0) 推荐(1)
leetcode-5-Longest Palindromic Substring
摘要：题目：Longest Palindromic Substring Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. E 阅读全文
posted @ 2018-05-27 15:18 pathjh 阅读(120) 评论(0) 推荐(0)
leetcode-3-Longest Substring Without Repeating Characters
摘要：题目：Longest Substring Without Repeating Characters Given a string, find the length of the longest substring without repeating characters. Examples: Giv 阅读全文
posted @ 2018-05-26 22:33 pathjh 阅读(157) 评论(0) 推荐(0)
leetcode-2-Add Two Numbers
摘要：题目：Add Two Numbers You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of 阅读全文
posted @ 2018-05-26 17:02 pathjh 阅读(143) 评论(0) 推荐(0)
正则匹配-题型总结
摘要：题目描述 Implement regular expression matching with support for'.'and'*'. '.' Matches any single character. '*' Matches zero or more of the preceding elem 阅读全文
posted @ 2018-05-16 01:07 pathjh 阅读(317) 评论(0) 推荐(0)
树-leetcode做题笔记
摘要：总结：对于二叉树的常见问题： 当涉及到按层序遍历，对二叉树进行各种操作时，常常采用栈或队列来对每一层数据进行保存 收获：对做题时常用的结构的方法进行了一下简要总结 1.Queue Queue： 基本上，一个队列就是一个先入先出（FIFO）的数据结构 Queue接口与List、Set同一级别，都是继承 阅读全文
posted @ 2018-03-31 00:47 pathjh 阅读(317) 评论(0) 推荐(0)