## [JZOJ4474] [luoguP4071] permutation count

description Find out how many sequences A of length n satisfy the following conditions: (1) The n numbers of 1 ~ n appear once in each sequence. (2) If the value of number I A[i] is i, then I is stable. Sequences that happen to have m numbers are stable There may be many sequences satisfying the conditions. The number of sequences is modular to ...

Added by domainshuffle on Fri, 11 Oct 2019 20:47:56 +0300

## BZOJ1832: [AHOI2008] Party (LCA)

Title: 1832: [AHOI2008] Party Analysis: Sometimes it's cool to do water problems. Find out the LCA first between two, and find that at least two LCAs are the same. This repetitive LCA is also the shallowest one. Then we choose the non-repetitive LCA, because if we choose this repetitive LCA, the repetitive LCA will go to another LCA twice, and ...

Added by Axeia on Mon, 07 Oct 2019 20:34:35 +0300

## vector Simple Common Usage

What is Vector? Vector is translated into vector, which is a variable-length array in some ways. It can automatically expand the capacity of the array as needed. Besides, it is a template class in STL. There are also some internal methods. Use of Vector 1. Add header files # include <iostream> # include <vector> using names ...

Added by alivec on Mon, 07 Oct 2019 10:34:17 +0300

## Solution to Luogu P3959 [Treasure]

A less slow pressure??? There's no purple question at all. The data is still so water. I'm not going to tell you I'm hack ed. Look at the data size, n < 12, decisive pressure. Then the starting point needs to be enumerated, and the dp state is set: f[i][j]= takes I as the starting point to minimize the cost of J status. Where j is ...

Added by tshafer on Sun, 06 Oct 2019 12:23:59 +0300

## The 2019 Asia Nanchang First Round Online Programming Contest E. Magic Master

Topic link: https://nanti.jisuanke.com/t/41352 The meaning of the title is easy to understand. Not many people have seen it. They feel frightened by the amount of passage. In fact, it's a water problem. Just reverse simulation. Using queue simulation, reverse simulation, it needs to put m cards in the back, then I put m cards in the front. At ...

Added by jumpfroggy on Wed, 02 Oct 2019 10:24:18 +0300

## Sword Finger offer 64: Maximum of Sliding Window

1 Topic Description Given an array and the size of the sliding window, find the maximum value in all sliding windows. For example, if the input array {2,3,4,2,6,2,5,1} and the size of the sliding window are 3, then there are six sliding windows, their maximum values are {4,4,6,6,5}; for the array {2,3,4,2,6,2,5,1}, there are sliding windows. ...

Added by recycles on Mon, 30 Sep 2019 22:08:59 +0300

## The best retries are exponential regression and jitter

1. overview In this tutorial, we will explore how to use two different strategies to improve client retry: exponential regression and jitter. 2. retry In distributed systems, network communication between multiple components may fail at any time. Client applications handle these failures by implementing retries. Imagine that we have a client ap ...

Added by gethinw on Sun, 22 Sep 2019 17:46:15 +0300

## 5 Structures and Classes

1.5 Structures and Classes Return to directory 1 Object-Oriented TechnologyLast Section 1.4 cpp programming foundationNext section 1.6 Common features of cpp structural morphology source code /* struct.cpp Examples of Structures */ #include <iostream> #include <string> struct Student { std::string name; // Full name std:: ...

Added by celavi on Fri, 20 Sep 2019 07:12:10 +0300

## Construction and Deconstruction of Objects

Catalog 1. Destructive function 2. Object construction and destructive order Between multiple objects Inside a single object 3. const object and const member function const object const member function 4. Relations among member functions, member variables and objec ...

Added by nestorvaldez on Wed, 18 Sep 2019 18:43:17 +0300

## To Beginners: HDU 2033~2043 Solutions

Continue to give the AC program of HDU 2033~2043 below for your reference.The 10 questions 2033-2043 are classified as "ACM Programming Final Examination (2006/06/07)" and "2005 Experimental Class Short Term Examination". HDU 2033: Everyone loves A+B Simple branch structure. #include <stdio.h> int main() { ...

Added by fodder on Mon, 16 Sep 2019 02:41:35 +0300