leetcode - 算法之道

leetcode 136.OJ-获取列表中仅出现一次的数字

给定一个非空的整数数组，除了一个元素外，每个元素都会出现两次。找一个单一的。 Note: 您的算法应具有线性…

leetcode 123. 最佳时间买卖股票(仅限N次)

假设您有一个数组，其中第i个元素是第i天给定股票的价格。设计算法以找到最大利润。您最多可以完成两笔交易。 …

leetcode 121. Best Time to Buy and Sell Stock(最佳时间买卖)

假设您有一个数组，其中的ith元素是第i天给定股票的价格。如果你只被允许完成至多一笔交易（即买一份，卖一份股…

leetcode 118. Pascal’s Triangle(帕斯卡三角形)

Given a non-negative integer numRows, generate the firs…

leetcode 112. Path Sum(路径求和)

给定一个二叉树和一个和，确定该树是否有一个根到叶的路径，以便将路径上的所有值相加等于给定的和。注意：叶是没有…

leetcode 111. Minimum Depth of Binary Tree(二叉树最小深度)

Given a binary tree, find its minimum depth. The minimu…

leetcode 110. Balanced Binary Tree(平衡树判断)

Given a binary tree, determine if it is height-balanced…

leetcode Convert Sorted Array to Binary Search Tree(有序列表转化为BST)

Given an array where elements are sorted in ascending o…

leetcode 107. Binary Tree Level Order Traversal II(二叉树分层排序)

Given a binary tree, return the bottom-up level order t…

leetcode 104. Maximum Depth of Binary Tree(二叉树深度-DFS方法)

Given a binary tree, find its maximum depth. The maximu…

leetcode 101. Symmetric Tree

Given a binary tree, check whether it is a mirror of it…

leetcode 100. Same Tree

Given two binary trees, write a function to check if th…

leetcode 88. Merge Sorted Array

Given two sorted integer arrays nums1 and nums2, merge …

leetcode 83. Remove Duplicates from Sorted List

Given a sorted linked list, delete all duplicates such …

leetcode 67. Add Binary

Given two binary strings, return their sum (also a bina…

leetcode 58. Length of Last Word

Given a string s consists of upper/lower-case alphabets…

leetcode 53. Maximum Subarray

Given an integer array nums, find the contiguous subarr…

leetcode 38. Count and Say

The count-and-say sequence is the sequence of integers …