一、刷题之前的一些准备 如果你连最基本的数据结构,例如链表,队列,栈,二叉树都没有接触过,那么我是不建议你去 leetcode 刷题的,所以我上面先说了先入门一下数据结构与算法,当你学习了这些基础的数据结构之后,其实已经具备了刷题的能力了。 基础数据结构与算法知识: 1、时间复杂度 2、空间复杂度 一般最先接触...
例如,给定一个列表 temperatures = [73, 74, 75, 71, 69, 72, 76, 73],你的输出应该是 [1, 1, 4, 2, 1, 1, 0, 0]。提示:气温 列表长度的范围是 [1, 30000]。每个气温的值的都是 [30, 100] 范围内的整数。 Solution1. C++ class Solution { public: vector<int> dailyTemperatures(vector...
LeetCode 150 Evaluate Reverse Polish Notation Medium Judge whether the current element is '+', '-', '*', '/' first. If not, it's an integer. LeetCode 456 132 Pattern Medium Every time we read one letter, we need to maintain a structure which stores all min-max Interval pairs before...
Binary Tree Postorder Go Hard O(n) O(1) Traversal 150. Evaluate Reverse Polish Go Medium O(n) O(1) Notation 155. Min Stack Go Easy O(n) O(n) 173. Binary Search Tree Iterator Go Medium O(n) O(1) 224. Basic Calculator Go Hard O(n) O(n) 225. Implement Stack using Go Easy...
[86%] leetcode-top-interview-150.md 130/150 - [94%] neetcode150.md 142/150 - [✅] 9c-advanced.md 75/93 18 vips [✅] 9c-dp.md 42/45 3 vips [✅] 9c-top.md 55/57 2 vips [✅] blind75.md 77/77 - [✅] geekbang.md 55/55 - [✅] grind102.md 101/102 1 vip...
再用leetcode75的算法 + (1 + 2 * i) % (n | 1),后者的作用是将前半部分放到奇数位,后半部分放到偶数位。 View Code leetcode 75. Sort Colors 题意: View Code 解法:一次替换的解法。O(n)时间复杂度,初始化两指针 left = 0;right = len - 1; ...
47 75.Sort Colors Medium Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and ...
Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 第一次提交出现变量未定义的编译错误,原因在于对for循环中的循环变量在循环结束后访问其数值以得知循环状态,这种情况下一定要在循环前就定义循环变量,如果在循环内部定义,循环结束后会自动释放。
length() != 0) { 75 operands.push(Long.parseLong(number.toString())); 76 } 77 // for "3+2*2" case that's why we need a while loop 78 while (!operators.isEmpty()) { 79 operands.push(this.calculateValue(operands, operators.pop())); 80 } 81 82 return (int)operands.pop()....
273problems solved Python3 168problems solved MySQL 3problems solved Show more Contest Rating 1,488 Global Ranking 328,730/692,597 Attended 1 Created with Highcharts 11.1.01,488Nov 2018 Top 48.02% Created with Highcharts 11.1.0 -/-