题目要求 Given a string S, return the "reversed" string where all characters that are not a letter stay in the same place, and all letters reverse their positions. 题目分析及思路 给定一个字符串,返回“reversed”后的字符串,要求非字母的字符保留原来的位置,字母字符逆序排列.可以先获得原字符串中的全部字母字符列表,然后遍历原字…
[LeetCode]848. Shifting Letters 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/shifting-letters/description/ 题目描述: We have a string S of lowercase letters, and an integer arr…
Given a string S, return the "reversed" string where all characters that are not a letter stay in the same place, and all letters reverse their positions. Example 1: Input: "ab-cd" Output: "dc-ba" Example 2: Input: "a-bC…
https://leetcode.com/problems/reverse-only-letters/ Given a string S, return the "reversed" string where all characters that are not a letter stay in the same place, and all letters reverse their positions. Example 1: Input: "ab-cd"…
Evaluate Reverse Polish Notation Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression. Some examples: ["2", "1", "+",…
[LeetCode]150. Evaluate Reverse Polish Notation 解题报告(Python) 标签: LeetCode 题目地址:https://leetcode.com/problems/evaluate-reverse-polish-notation/description/ 题目描述: Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operator…
LeetCode 2 Add Two Sum 解题报告 LeetCode第二题 Add Two Sum 首先我们看题目要求: You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return…