James Pan

原题网址：https://leetcode.com/problems/palindrome-permutation-ii/Given a string s, return all the palindromic permutations (without duplicates) of it. Return an empty list if no palindromic permut

原题网址：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.Do not allocate extra space for another ar

原题网址：https://leetcode.com/problems/combination-sum-ii/Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to

原题网址：https://leetcode.com/problems/permutations-ii/Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2] have the followi

原题网址：https://leetcode.com/problems/word-search/Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where

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/search-in-rotated-sorted-array-ii/Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed?Would this affect the run-time complexity

原题网址：https://leetcode.com/problems/remove-duplicates-from-sorted-list/Given a sorted linked list, delete all duplicates such that each element appear only once.For example,Given 1->1->2, r

原题网址：https://leetcode.com/problems/subsets-ii/Given a collection of integers that might contain duplicates, nums, return all possible subsets.Note:Elements in a subset must be in non-d

原题网址：https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original

原题网址:https://leetcode.com/problems/rearrange-string-k-distance-apart/Given a non-empty string str and an integer k, rearrange the string such that the same characters are at least distance k fro

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/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/remove-duplicates-from-sorted-array/Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.

原题网址：https://leetcode.com/problems/contains-duplicate-iii/Given an array of integers, find out whether there are two distinct indices i and j in the array such that the difference between nums[i] 

原题网址：https://leetcode.com/problems/repeated-dna-sequences/All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is someti

原题网址：https://leetcode.com/problems/find-the-duplicate-number/Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate nu

原题网址：https://leetcode.com/problems/unique-word-abbreviation/An abbreviation of a word follows the form . Below are some examples of word abbreviations:a) it --> it (no

原题网址：https://leetcode.com/problems/longest-substring-without-repeating-characters/Given a string, find the length of the longest substring without repeating characters.Examples:Given "ab

原题网址：https://leetcode.com/problems/intersection-of-two-linked-lists/Write a program to find the node at which the intersection of two singly linked lists begins.For example, the following

原题网址：https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters/Given a string, find the length of the longest substring T that contains at most 2 distinct characters.

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/remove-invalid-parentheses/Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results.Note: The

原题网址：https://leetcode.com/problems/single-number/Given an array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runti

原题网址：https://leetcode.com/problems/maximum-product-of-word-lengths/Given a string array words, find the maximum value of length(word[i]) * length(word[j]) where the two words do not share comm

原题网址：https://leetcode.com/problems/contains-duplicate/Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in

原题网址：https://leetcode.com/problems/contains-duplicate-ii/Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = num

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