James Pan

原题网址：https://leetcode.com/problems/valid-anagram/Given two strings s and t, write a function to determine if t is an anagram of s.For example,s = "anagram", t = "nagaram", return true.s 

原题网址：https://leetcode.com/problems/first-unique-character-in-a-string/Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.Examp

原题网址：https://leetcode.com/problems/ransom-note/Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the r

原题网址：https://leetcode.com/problems/minimum-window-substring/Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n).For ex

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

原题网址：https://leetcode.com/problems/substring-with-concatenation-of-all-words/You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of

原题网址：https://leetcode.com/problems/scramble-string/Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively.Below is one possible

原题网址：https://leetcode.com/problems/substring-with-concatenation-of-all-words/You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of

原题网址：https://leetcode.com/problems/majority-element-ii/Given an integer array of size n, find all elements that appear more than ⌊ n/3 ⌋ times. The algorithm should run in linear time and in O(1

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

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/majority-element/Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.You may as

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

原题网址：https://leetcode.com/problems/top-k-frequent-elements/Given a non-empty array of integers, return the k most frequent elements.For example,Given [1,1,1,2,2,3] and k = 2, return [1,2].

原题网址：https://leetcode.com/problems/palindrome-permutation/Given a string, determine if a permutation of the string could form a palindrome.For example,"code" -> False, "aab" -> True, "ca

原题网址：https://leetcode.com/problems/longest-palindrome/Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those let