题目如下: 解题思路:本题要求的是数组每个元素和所有排在这个元素后面的元素的值的二倍做比较.我们可以先把数组所有元素的二倍都算出来,存入一个新的数组newlist,并按升序排好.而后遍历nums数组的每个元素i,通过二分查找的方法在newlist中找到值比i小的元素中下标最大的那个(记为inx),那么符合条件i元素的reverse paris就是inx,累计所有的inx即可得到结果. 代码如下: class Solution(object): def reversePairs(self, num…

Algorithm [leetcode]557. Reverse Words in a String III https://leetcode.com/problems/reverse-words-in-a-string-iii/ 1)problem Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace…

Difficulty: Medium  More:[目录]LeetCode Java实现 Description Given an input string, reverse the string word by word. Example: Input: "the sky is blue", Output: "blue is sky the". Note: A word is defined as a sequence of non-space character…

[Question] Reverse digits of an integer. Example: x = 123, return 321 x = -123, return -321 [My Solution] class Solution(object): def reverse(self, x): """ :type x: int :rtype: int """ neg = 1 if x < 0: neg = -1 if x == 0:…

[Question] Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". [My Solution] Slice 切片 class Solution(object): def reverseString(self, s): """ :type s…

   一.问题描述 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", "+", "3", "*&…

题目如下: Given a string s that consists of lower case English letters and brackets. Reverse the strings in each pair of matching parentheses, starting from the innermost one. Your result should not contain any bracket. Example 1: Input: s = "(abcd)"…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 遍历 日期 题目地址:https://leetcode-cn.com/problems/index-pairs-of-a-string/ 题目描述 Given a text string and words (a list of strings), return all index pairs [i, j] so that the substring…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 迭代 递归 日期 [LeetCode] 题目地址:https://leetcode.com/problems/reverse-linked-list/ Total Accepted: 105474 Total Submissions: 267077 Difficulty: Easy 题目描述 Reverse a singly linked list.…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 使用栈 双指针 日期 [LeetCode] 题目地址:https://leetcode.com/problems/reverse-vowels-of-a-string/ Total Accepted: 7758 Total Submissions: 22132 Difficulty: Easy 题目描述 Write a function that t…