James Pan

原题网址：https://leetcode.com/problems/missing-ranges/Given a sorted integer array where the range of elements are [lower, upper] inclusive, return its missing ranges.For example, given [0, 1, 3

原题网址：https://leetcode.com/problems/paint-fence/There is a fence with n posts, each post can be painted with one of the k colors.You have to paint all the posts such that no more than two adj

原题网址：https://leetcode.com/problems/surrounded-regions/Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'.A region is captured by flipping all 'O's into 'X's i

原题网址：https://leetcode.com/problems/palindrome-partitioning-ii/Given a string s, partition s such that every substring of the partition is a palindrome.Return the minimum cuts needed for a pa

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/wiggle-sort-ii/Given an unsorted array nums, reorder it such that nums[0] nums[2] .Example:(1) Given nums = [1, 5, 1, 1, 6, 4], one possible answer is

原题网址：https://leetcode.com/problems/house-robber-iii/The thief has found himself a new place for his thievery again. There is only one entrance to this area, called the "root." Besides the root,

原题网址：https://leetcode.com/problems/number-of-islands-ii/A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at posit

原题网址：https://leetcode.com/problems/decode-ways/A message containing letters from A-Z is being encoded to numbers using the following mapping:'A' -> 1'B' -> 2...'Z' -> 26Given an enco

原题网址：https://leetcode.com/problems/find-peak-element/A peak element is an element that is greater than its neighbors.Given an input array where num[i] ≠ num[i+1], find a peak element and ret

原题网址：https://leetcode.com/problems/island-perimeter/You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizon