James Pan

原题网址：https://leetcode.com/problems/kth-largest-element-in-an-array/Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth dis

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/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/best-time-to-buy-and-sell-stock-iv/Say you have an array for which the ith element is the price of a given stock on day i.Design an algorithm to find the m

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：http://www.lintcode.com/en/problem/consistent-hashing/一般的数据库进行horizontal shard的方法是指，把 id 对 数据库服务器总数 n 取模，然后来得到他在哪台机器上。这种方法的缺点是，当数据继续增加，我们需要增加数据库服务器，将 n 变为 n+1 时，几乎所有的数据都要移动，这就造成了不 consist

原题网址：https://leetcode.com/problems/remove-duplicate-letters/Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You mus

原题网址：https://leetcode.com/problems/sliding-window-maximum/Given an array nums, there is a sliding window of size k which is moving from the very left of the array to the very right. You can only

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/design-twitter/Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in

原题网址：https://leetcode.com/problems/find-median-from-data-stream/Median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value. So the median is

原题网址：https://leetcode.com/problems/range-addition/Assume you have an array of length n initialized with all 0's and are given k update operations.Each operation is represented as a triplet: 

原题网址：https://www.hackerrank.com/challenges/cut-the-sticksYou are given  sticks, where the length of each stick is a positive integer. A cut operation is performed on the sticks such that a

原题网址：https://leetcode.com/problems/merge-k-sorted-lists/Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity.方法：使用最小堆维护当前最小值。/** * Definition fo

原题网址：https://leetcode.com/problems/maximal-square/Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area.For example, given the foll

原题网址：https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/There are a number of spherical balloons spread in two-dimensional space. For each balloon, provided input is the st