James Pan

原题网址：https://leetcode.com/problems/group-shifted-strings/ Given a string, we can "shift" each of its letter to its successive letter, for example: "abc" -> "bcd". We can keep "shifting" which f

原题网址：https://leetcode.com/problems/isomorphic-strings/ Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t.

原题网址：https://leetcode.com/problems/anagrams/ Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "tan", "ate", "nat", "bat"],  Return: [ ["ate", "eat","t

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/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