喵星人与汪星人

摘要： Add BinaryGiven two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100".算法思路：模拟二进制加法，跟十进制木有区别，将a，b转置(不转置的话，倒着... 阅读全文

摘要： Substring with Concatenation of All WordsYou are given a string,S, and a list of words,L, that are all of the same length. Find all starting indices o... 阅读全文

摘要： Valid ParenthesesGiven a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must clos... 阅读全文

摘要： Reverse Words in a StringGiven an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".click... 阅读全文

摘要： ZigZag ConversionThe string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern i... 阅读全文

摘要： Gray CodeThe gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integernrepresenting the tot... 阅读全文

摘要： Permutation SequenceThe set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the fo... 阅读全文

摘要： Next PermutationImplement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangemen... 阅读全文

摘要： Permutations IIGiven a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the follow... 阅读全文

摘要： Add Two NumbersYou are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes co... 阅读全文