摘要： https://leetcode.com/problems/plus-one/ 题目： Given a non-negative number represented as an array of digits, plus one to the number. The digits are stor 阅读全文

摘要： https://leetcode.com/problems/length-of-last-word/ 题目： Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return 阅读全文

摘要： https://leetcode.com/problems/count-and-say/ 题目： The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, 阅读全文