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list 定义 s = [] 用［］来保存数据，数据可以是不同的类型 添加或者删除数据 添加到尾部：s.append() 添加到中间：s.insert(1, ‘a’) 删除某个数据：s.pop(‘a’) 添加某个数组：s.append(s1)／s.extend(s1) set 1. s = set([‘A’, ‘B’, ‘C’]) 2. 用（）来保存数据，数组内的数不...

Leetcode: Single Number — PythonQuestionAnswernote Question Given a non-empty array of integers, every element appears twice except for one. Find that single one. Answer class Solution(object): de...

leetcode questions — pythonQuestionAnswernotes Question Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would ...

Leetcode: Hamming Distance — PythonQuestionAnswernotes Question The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x...

Leetcode: Drop Eggs — PythonQuestionAnswernote Question You are given K eggs, and you have access to a building with N floors from 1 to N. Each egg is identical in function, and if an egg breaks, you ...