06 2016 档案
摘要：题目： Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A man, a plan, a canal:
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摘要：题目： Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transac
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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]. 链接： http://leetcode.com/problems/pascals
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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
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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 su
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摘要：题目： Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the neare
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摘要：题目： Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as a binary tree in which the
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摘要：题目： Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root).
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摘要：题目： Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthe
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摘要：题目： Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tre
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摘要：题目： Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree is symmetric: 1 / \ 2
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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 identic
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摘要：题目： Given two sorted integer arrays A and B, merge B into A as one sorted array. Note:You may assume that A has enough space (size that is greater or
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摘要：题目： Given a sorted linked list, delete all duplicates such that each element appear only once. For example,Given 1->1->2, return 1->2.Given 1->1->2->3
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摘要：题目： You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can yo
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摘要：题目： Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"Return "100". 链接： http://leetcode.com/problems/add-b
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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
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摘要：题目： Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string. If the last
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摘要：题目： The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ... 1 is read off as "one 1" or 11.11 is read
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摘要：题目： Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled
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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'
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摘要：题目： Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra spac
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摘要：题目： Given a linked list, swap every two adjacent nodes and return its head. For example,Given 1->2->3->4, you should return the list as 2->1->4->3. Yo
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摘要：题目： Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. 链接：
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摘要：题目： Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in
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摘要：题目: 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 i
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摘要：题目： Write a function to find the longest common prefix string amongst an array of strings. 链接：http://leetcode.com/problems/longest-common-prefix/ 一刷：
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摘要：题目： Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindro
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