程序媛詹妮弗

2018年5月24日

摘要： Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex 阅读全文

posted @ 2018-05-24 06:59 程序媛詹妮弗阅读(209) 评论(0) 推荐(0) 编辑

2018年5月23日

[leetcode]416. Partition Equal Subset Sum 平分集合

摘要： Given a non-empty array containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in both 阅读全文

posted @ 2018-05-23 03:55 程序媛詹妮弗阅读(364) 评论(0) 推荐(0) 编辑

[leetcode]131. Palindrome Partitioning字符串分割成回文子串

摘要： Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. Example: 题阅读全文

posted @ 2018-05-23 03:24 程序媛詹妮弗阅读(125) 评论(0) 推荐(0) 编辑

[leetcode]139. Word Break单词能否拆分

摘要： Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequ 阅读全文

posted @ 2018-05-23 03:17 程序媛詹妮弗阅读(151) 评论(0) 推荐(0) 编辑

2018年5月22日

理解dynamic programming动态规划

摘要：何谓动态规划？以菲波那切数列为例，该递归调用中，有大量重复子集，如图在计算fib(5) 的时候，多次计算了fib(2)的值。那为何不在递归搜索的基础上，添加一个小笔记本进行记忆化：只在第一次fib(2)的时候计算结果，而下次再call fib(2)的时候，可以直接O(1)时间从记事本拿到该结阅读全文

posted @ 2018-05-22 07:13 程序媛詹妮弗阅读(641) 评论(0) 推荐(0) 编辑

[leetcode]91. Decode Ways解码方法

摘要： A message containing letters from A-Z is being encoded to numbers using the following mapping: Given a non-empty string containing only digits, determ 阅读全文

posted @ 2018-05-22 06:33 程序媛詹妮弗阅读(160) 评论(0) 推荐(0) 编辑

[leetcode]200. Number of Islands岛屿个数

摘要： Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacen 阅读全文

posted @ 2018-05-22 04:58 程序媛詹妮弗阅读(216) 评论(0) 推荐(0) 编辑

[leetcode]671. Second Minimum Node In a Binary Tree二叉树次小结点

摘要： Given a non-empty special binary tree consisting of nodes with the non-negative value, where each node in this tree has exactly two or zero sub-node. 阅读全文

posted @ 2018-05-22 03:15 程序媛詹妮弗阅读(92) 评论(0) 推荐(0) 编辑

[leetcode]75. Sort Colors三色排序

摘要： Given an array with n objects colored red, white or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the or 阅读全文

posted @ 2018-05-22 03:01 程序媛詹妮弗阅读(176) 评论(0) 推荐(0) 编辑

[leetcode]76. Minimum Window Substring最小字符串窗口

摘要： Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n). Example: Input: S = "ADOB 阅读全文

posted @ 2018-05-22 02:15 程序媛詹妮弗阅读(219) 评论(0) 推荐(0) 编辑