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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) ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

Shallow copy: take string class as an example When copying a known object, the compiler will automatically call a constructor - copy constructor. If the user does not define a copy constructor, the default copy constructor will be called. The default copy structure belongs to the shallow copy, which is equivalent to two pointer variables poin ...