## LeetCode 445 -- sum of two numbers II

1. topic 2. answers 2.1 method 1 stay LeetCode 206 - reverse linked list and LeetCode 2 -- sum of two numbers On the basis of this, we first reverse the two linked lists, then find the sum and then reverse them. /** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x) ...

Added by Devsense on Mon, 02 Dec 2019 07:04:51 +0200

## Luogu P3600 random number generator (expected dp combination number)

meaning of the title Title Link Sol An important property: if an interval covers another interval, then the interval is useless (it will not contribute to the maximum value) First, it's not hard to think of enumerating the final answer \ (x \). At this time, we need to calculate the probability that the maximum value is exactly \ (x \). It's no ...

Added by student101 on Sun, 01 Dec 2019 12:38:20 +0200

## c/c + + inheritance and polymorphic container and inheritance 1

Question: Class B inherits class A, class A has virtual function fun, class B covers virtual function fun, and has a STD:: vector < a >. Add object a and object B of a to this container, and then take them out of vector. What happens if you use object a.fun() and object b.fun()? Find the call of object b.fun(), which actually calls the fu ...

Added by rage2021 on Sun, 01 Dec 2019 10:45:07 +0200

## Using cuda core in open CV CPP

Prerequisite Install the Invida graphics card on your computer; Install Invida driver, version recommendation is more than 10; Install cuda and cudnn; github downloads opencv, opencv_contribute; local cmake compiles opencv; target In cpp, use the cuda kernel function written by you; Reasons for writing this article Recently, I was writing cud ...

Added by ultraslacker on Fri, 22 Nov 2019 04:11:58 +0200

## P1438 boring sequence (difference + line tree)

subject P1438 boring sequence Analysis: First, consider the modification. Using the basic idea of difference, add the first item \ (k \) to the left endpoint, add the tolerance \ (D \) to the difference array of each number in the modification interval \ ((l,r] \), and then subtract \ (k + (R-L) times d \) from the last \ (r+1 \). The query is ...

Added by rubenc on Thu, 21 Nov 2019 20:56:47 +0200

## P2472 [SCOI2007] lizard (maximum flow)

subject P2472 [SCOI2007] lizard analysis The idea of this problem is quite clear. In this paper, I ran the maximum flow with Jiu as my brain free map, but I hung up and rebuilt the map after an hour. Build a super source and a super sink, Every stone pillar has its fixed passing times, that is to say, we need to limit its passing times. How to ...

Added by huszi001 on Mon, 18 Nov 2019 21:03:28 +0200

## NOIP 2011 Mayan game search

Topic link: https://www.luogu.org/problemnew/show/P1312 My first question solution!! Of course, thanks. ZAGER , his link https://www.cnblogs.com/ZAGER/p/9535526.html   This question is a big search, which really tests my code ability It's a good habit to write functions with clear ideas. Step by step Define map[i][j] to represent the cur ...

Added by Amitk on Fri, 15 Nov 2019 22:59:36 +0200

## Arduino NRF24L01 application instance (32Bytes)

Application example of Arduino(NANO) NRF24L01 Software preparation:microBox Library( https://github.com/wastel7/microBox ): build a mini command line systemMirf Library ( https://github.com/E-elektronic/Mirf ): provide RF related core functionsPlease download the above library by yourself Hardware preparation:Arduino NANO plate x 2; NRF24L01 x ...

Added by mwl707 on Sun, 10 Nov 2019 22:38:02 +0200

## MFC bottom window implementation

Brief description MFC is a basic class library of Microsoft. If GUI is developed on Windows platform, it is a good choice. Simply record the knowledge points that need to be mastered or viewed later in the learning process of MFC. Windows Messaging First, the operating system captures the messages from the keyboard or mouse input system, and ...