James Pan

原题网址：https://leetcode.com/problems/search-a-2d-matrix-ii/Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties:Integers in e

原题网址：https://leetcode.com/problems/valid-parentheses/Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.The brackets must

原题网址：https://leetcode.com/problems/median-of-two-sorted-arrays/There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run t

原题网址：https://leetcode.com/problems/maximum-subarray/Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array [−2,1

原题网址：https://leetcode.com/problems/search-a-2d-matrix/Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties:Integers in each

原题网址：https://leetcode.com/problems/remove-duplicates-from-sorted-array-ii/Follow up for "Remove Duplicates":What if duplicates are allowed at most twice?For example,Given sorted array nu

原题网址：https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/Say you have an array for which the ith element is the price of a given stock on day i.Design an algorithm to

原题网址：https://leetcode.com/problems/the-skyline-problem/A city's skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. Now suppose y

原题网址：https://leetcode.com/problems/count-of-smaller-numbers-after-self/You are given an integer array nums and you have to return a new counts array. The counts array has the property where coun

原题网址：https://leetcode.com/problems/find-k-pairs-with-smallest-sums/You are given two integer arrays nums1 and nums2 sorted in ascending order and an integer k.Define a pair (u,v) which consists

原题网址：https://leetcode.com/problems/super-ugly-number/Write a program to find the nth super ugly number.Super ugly numbers are positive numbers whose all prime factors are in the given prime

原题网址：https://leetcode.com/problems/container-with-most-water/Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn su

原题网址：https://leetcode.com/problems/intersection-of-two-arrays/Given two arrays, write a function to compute their intersection.Example:Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return 

原题网址：https://leetcode.com/problems/product-of-array-except-self/Given an array of n integers where n > 1, nums, return an array output such that output[i] is equal to the product of all the

原题网址：https://leetcode.com/problems/shortest-word-distance-ii/This is a follow up of Shortest Word Distance. The only difference is now you are given the list of words and your method will be c

原题网址：https://leetcode.com/problems/move-zeroes/Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.For exam

原题网址：https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/Given an array where elements are sorted in ascending order, convert it to a height balanced BST.方法：递归，自顶向下。/** *

原题网址：https://leetcode.com/problems/count-of-range-sum/Given an integer array nums, return the number of range sums that lie in [lower, upper] inclusive.Range sum S(i, j) is defined as the su

原题网址：https://leetcode.com/problems/two-sum/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 

原题网址：https://leetcode.com/problems/find-minimum-in-rotated-sorted-array-ii/Follow up for "Find Minimum in Rotated Sorted Array":What if duplicates are allowed?Would this affect the run-time

原题网址：https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7

原题网址：https://leetcode.com/problems/maximum-product-subarray/Find the contiguous subarray within an array (containing at least one number) which has the largest product.For example, given the

原题网址：https://leetcode.com/problems/range-sum-query-immutable/Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive.Example:Given nums = [-2

原题网址：https://leetcode.com/problems/range-sum-query-2d-immutable/Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lowe

原题网址：https://leetcode.com/problems/largest-rectangle-in-histogram/Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest