HDU - 3874 Necklace (tree array + greedy)

Title Link Question meaning: now there are n numbers, numbered 1-n. now, m queries are given, and an interval [l,r] is given each time. Ask you what is the sum of the numbers in the interval, but the same number can only be calculated once. Problem solving: now we have a problem how to calculate th ...

Posted on Tue, 15 Oct 2019 12:36:12 -0700 by mortal991

POJ1990 -- MooFest (converted into a tree array)

Title: If V is v1,v2, x is X1 and x2, then the value between them is ABS (x1-x2)* Max (v1, v2), and the sum of values between all n*(n-1)/2 pairs of cattle is calculated. Train of thought: After reading https://blog.csdn.net/bestsort/article/details/80853221, it's nice to have a picture. It's clear ...

Posted on Fri, 11 Oct 2019 10:28:20 -0700 by JPark

[Codeforces 342E] Big-small algorithm

cf342E This is the first Big-small algorithm of contact. Give you a tree. Everyone's red or white at first. At first, the root is red dot. Two operations change a dot to a red dot and ask how far a white dot is from the nearest red dot. Coincidentally, when we save sqrt(m) inquiries and look up each whi ...

Posted on Sat, 05 Oct 2019 14:59:58 -0700 by batfink

[P1393 Dynamic Reverse Sequence Pair] CDQ Divide and Conquer

P1393 The divide-and-conquer version of CDQ, which was mentioned in the previous blog, is hot. We already know that inverse ordinal number equals the original inverse ordinal number minus the contribution of deleting one number at a time. So since the contribution of a number equals the subscript larger ...

Posted on Sat, 05 Oct 2019 10:50:13 -0700 by Leviathan

Instructions on the Use of armadillo Matrix Library in C++

stay http://blog.csdn.net/piaoxuezhong/article/details/58055709 The use of eigen matrix library is introduced in this blog. Here we introduce another matrix library: armadillo.~ Armadillo: A Substitute for Matlab in C++ Armadillo is one of the widely used C++ matrix operation libraries at present. Many of the matrix operation functions of M ...

Posted on Thu, 04 Jul 2019 11:06:59 -0700 by trukfixer

17. Initialization of SDRAM and code relocation

17.1. Analysis of Code Relocation Principle (1) In SRAM, the code is relocated from 0xd0020010 to 0xd0024000. The original code is running in 0xd0020010, but we also hope that the code actually runs in 0xd0024000. Now we need to relocate. This relocation practice is purely for practicing relocation skills, but in some cases relocation is nec ...

Posted on Sun, 14 Apr 2019 17:30:33 -0700 by SCRUBBIE1

Depth-first search and breadth-first search of adjacency matrix representation graph

Depth First Search (DFS) of Graphs: It can be described as "breaking the casserole to the end". Specifically, after visiting a vertex, I visit its next adjacent vertex, and so on, until the current vertex is visited or there is no adjacent vertex. Similarly, the introduction to the algorithm uses a "smart approach" to mark ...

Posted on Sun, 07 Apr 2019 22:45:31 -0700 by PHPTOM

C and C UDA Hybrid Programming Configuration

Original: http://blog.csdn .NET/u012234115/article/details/34860273 When doing project integration, we need to use cpp and cuda file debugging. We have explored two ways to realize mixed compilation of cpp and cu files. The environment of this paper: Windows 7 64 bits VS2010 CUDA5.5 Nvidia graphics card Tesla C1060 Preface Af ...

Posted on Mon, 01 Apr 2019 07:48:29 -0700 by PHP_TRY_HARD

A detailed explanation of static members of C++ classes

In C++, static members belong to the whole class rather than an object, and only one static member variable is stored for all objects to share. So it can be shared among all objects. Using static member variables to realize data sharing among multiple objects will not destroy the principle of hiding, ensure security and save memory. A key st ...

Posted on Sun, 31 Mar 2019 13:30:28 -0700 by hrdyzlita

Mixed compilation of C and C++, extern"C" usage

Chapter 1: Reproduced in ___________ Mixed compilation of C and C++ On extern_C Usually, code in the form of the following is often seen in the header file of C language #ifdef __cplusplus extern "C" { #endif /**** some declaration or so *****/ #ifdef __cplusplus } #endif /* end of __cplusplus */ So what's the use of ...

Posted on Fri, 22 Mar 2019 09:18:52 -0700 by frosty1433