James Pan

原题网址：https://leetcode.com/problems/single-number-ii/Given an array of integers, every element appears three times except for one. Find that single one.Note:Your algorithm should have a lin

原题网址：https://leetcode.com/problems/additive-number/Additive number is a string whose digits can form additive sequence.A valid additive sequence should contain at least three numbers. Except

原题网址：https://leetcode.com/problems/plus-one/Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit i

原题网址：https://leetcode.com/problems/add-binary/Given two binary strings, return their sum (also a binary string).For example,a = "11"b = "1"Return "100".方法一：使用字符串来表示。public class So