yanrui92的专栏

Given an array of strings, return all groups of strings that are anagrams.Note: All inputs will be in lower-case.public class Solution { public List anagrams(String[] strs) { HashM

Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two numbers such that they add up to the target, whe