Programmer Group

Catalog Article Directory 1. Time Complexity 2. Spatial Complexity 1. Time Complexity 1. Complexity: A measure of the efficiency of an algorithm 2. Concept: Time complexity mainly measures the speed of an algorithm, the number of basic operations in the algorithm, which is the time complexity of the algorithm. ...

Example: The best time to buy and sell stocks II Given an array prices, where   prices[i] is the price of a given stock on day I. Design an algorithm to calculate the maximum profit you can make. You can complete as many transactions as possible (buying and selling a stock multiple times). Note: you cannot participate in multiple t ...

Title: [CSP-S2020] Julian day - Valleyhttps://www.luogu.com.cn/problem/P7075 After reading the question, we can see that this question is a simulation question about time. According to the meaning of the question: The time is divided into two periods: the Julian calendar from January 1, 4713 BC to October 4, 1582 ad (inclusive); October 15 ...

Quicksort is an improvement of bubble sort algorithm. 1. Sorting process The quick sort algorithm realizes sorting through multiple comparisons and exchanges. The sorting process is as follows: (1) First, set a boundary value, and divide the array into left and right parts through the boundary value. (2) Collect data greater than or equal ...

Preparatory knowledge Heap sort Heap sort is a sort algorithm designed by using the data structure of heap. Heap sort is a selective sort. Its worst, best, average time complexity is O(nlogn), and it is also an unstable sort. First, simply understand the lower heap structure. heap Heap is a complete binary tree with the following pro ...

E Evil Coordinate Simulation + thinking Here's a question for you U L R D ULRD ULRD is a string of four characters, U U ...

/* @Author: yang@Date: 2021-09-27 19:40:34@LastEditors: yang@LastEditTime: 2021-10-19 19:57:43@FilePath: \demo \ breadth first traversal. js */ Front end "N Queen" recursive backtracking classical problem Let's look at the problem first. In fact, the problem is not difficult to understand: The n queen problem studies how to place n ...

1. Contents and requirements of the experiment: 1. Create two ordered linear tables from keyboard input (input data of each linear table is entered in order from smallest to largest, regardless of sorting algorithm); Output the two ordered linear tables; Merge the two ordered linear tables into an ordered linear table. The output is a merged o ...

Mahjong Foundation Before introducing the code, let's introduce the basis of Mahjong: There are 4 pieces of 10000-90000, 4 pieces of 1-9 cake, 4 pieces of 1-9 rope and 4 pieces of southeast and northwest white hair in a pair of mahjong cards The three consecutive cards of 10000, cake and flower color are called shunzi, for example: 12000, ...

Ciel and Flipboard Problem solution We define s ( i , j ) s(i,j) s(i,j) indicates a ...