__Meng

2018年3月21日

摘要： Description: Count the number of prime numbers less than a non-negative number, n. Credits:Special thanks to @mithmatt for adding this problem and cre 阅读全文

posted @ 2018-03-21 15:05 __Meng 阅读(94) 评论(0) 推荐(0) 编辑

501. Find Mode in Binary Search Tree

摘要： Given a binary search tree (BST) with duplicates, find all the mode(s) (the most frequently occurred element) in the given BST. Assume a BST is define 阅读全文

posted @ 2018-03-21 11:20 __Meng 阅读(167) 评论(0) 推荐(0) 编辑

101. Symmetric Tree

摘要： Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree [1,2,2,3,4,4,3] is symmet 阅读全文

posted @ 2018-03-21 10:46 __Meng 阅读(99) 评论(0) 推荐(0) 编辑

160. Intersection of Two Linked Lists

摘要： Write a program to find the node at which the intersection of two singly linked lists begins. For example, the following two linked lists: begin to in 阅读全文

posted @ 2018-03-21 10:23 __Meng 阅读(147) 评论(0) 推荐(0) 编辑

2018年3月20日

234. Palindrome Linked List

摘要： 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? 判断单链表是否是回文的 C++（25ms）：阅读全文

posted @ 2018-03-20 16:18 __Meng 阅读(101) 评论(0) 推荐(0) 编辑

746. Min Cost Climbing Stairs

摘要： On a staircase, the i-th step has some non-negative cost cost[i] assigned (0 indexed). Once you pay the cost, you can either climb one or two steps. Y 阅读全文

posted @ 2018-03-20 16:00 __Meng 阅读(101) 评论(0) 推荐(0) 编辑

783. Minimum Distance Between BST Nodes

摘要： Given a Binary Search Tree (BST) with the root node root, return the minimum difference between the values of any two different nodes in the tree. Exa 阅读全文

posted @ 2018-03-20 15:18 __Meng 阅读(407) 评论(0) 推荐(0) 编辑

2018年3月19日

290. Word Pattern

摘要： Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a lette 阅读全文

posted @ 2018-03-19 20:59 __Meng 阅读(111) 评论(0) 推荐(0) 编辑

155. Min Stack

摘要： Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Remov 阅读全文

posted @ 2018-03-19 14:54 __Meng 阅读(116) 评论(0) 推荐(0) 编辑

2018年3月18日

cp命令

摘要： cp命令用来将一个或多个源文件或者目录复制到指定的目的文件或目录。它可以将单个源文件复制成一个指定文件名的具体的文件或一个已经存在的目录下。 cp命令还支持同时复制多个文件，当一次复制多个文件时，目标文件参数必须是一个已经存在的目录，否则将出现错误。阅读全文

posted @ 2018-03-18 21:59 __Meng 阅读(189) 评论(0) 推荐(0) 编辑

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