LeetCode(100)题解--Same Tree
摘要：https://leetcode.com/problems/same-tree/ 题目： Given two binary trees, write a function to check if they are equal or not. Two binary trees are consider
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LeetCode(16)题解--3Sum Closest
摘要：https://leetcode.com/problems/3sum-closest/ 题目： Given an array S of n integers, find three integers in S such that the sum is closest to a given numbe
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LeetCode(15)题解--3Sum
摘要：https://leetcode.com/problems/3sum/ 题目： Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique tripl
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LeetCode(125)题解--Valid Palindrome
摘要：https://leetcode.com/problems/valid-palindrome/ 题目： Given a string, determine if it is a palindrome, considering only alphanumeric characters and igno
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LeetCode(155)题解--Min Stack
摘要：https://leetcode.com/problems/min-stack/ 题目： Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x)
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LeetCode(88)题解-- Merge Sorted Array
摘要：https://leetcode.com/problems/merge-sorted-array/ 题目： Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Not
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LeetCode(82)题解: Remove Duplicates from Sorted List II
摘要：https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/ 题目： Given a sorted linked list, delete all nodes that have duplicate numbers, lea
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LeetCode(83)题解: Remove Duplicates from Sorted List
摘要：https://leetcode.com/problems/remove-duplicates-from-sorted-list/ 题目： Given a sorted linked list, delete all duplicates such that each element appear
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LeetCode(70)题解: climbing-stairs
摘要：https://leetcode.com/problems/climbing-stairs/ 题目： You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb
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LeetCode(67)题解: Add Binary
摘要：https://leetcode.com/problems/add-binary/ 题目： Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"Return "10
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LeetCode(66)题解: Plus One
摘要：https://leetcode.com/problems/plus-one/ 题目： Given a non-negative number represented as an array of digits, plus one to the number. The digits are stor
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Leetcode(58)题解:Length of Last Word
摘要：https://leetcode.com/problems/length-of-last-word/ 题目： Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return
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LeetCode(38)题解: Count and Say
摘要：https://leetcode.com/problems/count-and-say/ 题目： The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221,
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LeetCode(11)题解: Container With Most Water
摘要：https://leetcode.com/problems/container-with-most-water/ 题目： Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinat
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LeetCode(3)题解: Longest Palindromic Substring
摘要：https://leetcode.com/problems/longest-palindromic-substring/ 题目： Given a string S, find the longest palindromic substring in S. You may assume that th
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LeetCode(28)题解:Implement strStr()
摘要：https://leetcode.com/problems/implement-strstr/ 题目： Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if need
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LeetCode(27)题解:Remove Element
摘要：https://leetcode.com/problems/remove-element/ Given an array and a value, remove all instances of that value in place and return the new length. The o
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LeetCode(26)题解:Remove Duplicates from Sorted Array
摘要：https://leetcode.com/problems/remove-duplicates-from-sorted-array/ Given a sorted array, remove the duplicates in place such that each element appear
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LeetCode(21)题解:Merge Two Sorted Lists
摘要：https://leetcode.com/problems/merge-two-sorted-lists/ Merge two sorted linked lists and return it as a new list. The new list should be made by splici
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LeetCode题解(20)--Valid Parentheses
摘要：https://leetcode.com/problems/valid-parentheses/ 原题： Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the i
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