LeetCode: Reverse Words in a String:Evaluate Reverse Polish Notation Evaluate the value of an arithmetic expression inReverse Polish Notation. Valid operators are+,-,*,/. Each operand may be an integer or another expression. Some examples: ["2", "1", "+", "3", "*"] -> ((2 + 1)...
self.reverseStrs(l, 0, len(l) - 1) # 2.翻转字符 # ['y', 'a', 'd', 'o', 't', ' ', 'g', 'n', 'i', 'n', 'i', 'a', 'r', ' ', 's', 'i', ' ', 't', 'i'] self.reverseEachWord(l) # 3.翻转每个单词 # ['t', 'o', 'd', 'a', 'y', ' ',...
1classSolution {2public:3voidreverseWords(string&s) {4stringtemp;5stack<string>sta;6for(inti=0;i<s.length();i++)7{8if(s[i]!='')9{10temp+=s[i];11}12else13{14if(temp!="")15sta.push(temp);16temp="";17}18}19if(temp!="")20sta.push(temp);21s="";22while(sta.size()!
leetcode 92. Reverse Linked List II 反转链表 + 头插入反转链表(或者使用栈) Reverse a linked list from position m to n. Do it in-place and in one-pass. For example: Given 1->2->3->4->5->NULL, m = 2 and n = 4, return 1->4->3->2->5->NULL. Note: Given m, n satisfy...
ReversePairs是LeetCode Weekly Contest 19的最后一题,很可惜没有做出来。这篇文章就是针对此类数组问题做出的总结。 解决复杂的数组类问题主要思想就是动态规划:将数组拆分,解决子问题。 问题定义 假设一个数组nums,含有n个元素。nums[i, j]表示下标从i到j的子数组。T(i, j)表示当前问题在子数组nums[i, j...
Can you solve this real interview question? Reverse Words in a String - Given an input string s, reverse the order of the words. A word is defined as a sequence of non-space characters. The words in s will be separated by at least one space. Return a s
输入:“leetcode” 输出:“leotcede” 注意:元音不包括字母“y”。 本次解题使用的开发工具是eclipse,jdk使用的版本是1.8,环境是win7 64位系统,使用Java语言编写和测试。 02 第一种解法 元音字母包含:a e i o u 这五个,利用栈先进后出的特性,把字符串转为字符数组,利用迭代,遇到五个元音字母(包含大小写...
Leetcode 92 Reverse Linked List II Reverse a linked list from position m to n. Do it in-place and in one-pass. For example: Given1->2->3->4->5->NULL, m = 2 and n = 4, return1->4->3->2->5->NULL. Note: Given m, n satisfy the following condition: 1 ≤ m ≤ n ≤...
LeetCode笔记:345. Reverse Vowels of a String 问题: Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Given s = "hello", return "holle". Example 2: Given s = "leetcode", return "leotcede". Note: The vowels does not include the ...
151. Reverse Words in a String Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". 题目大意: 输入一个字符串,将单词序列反转。 思路1: 采用一个vector,来存放中间结果 ...