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/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/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/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/find-the-difference/ Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one m

原题网址：https://leetcode.com/problems/sort-characters-by-frequency/ Given a string, sort it in decreasing order based on the frequency of characters. Example 1: Input: "tree" Output: "eert" Ex