Programmer Think

2055. Plates between candles [medium] [daily] Idea: Record the number of plates in front of each position with cnt; Use left to record the position of the first candle on the left of the current position; Use right to record the position of the first candle on the right of the current position.Traverse each query, and define x as the posit ...

5, Advanced lighting: Shadows (shadow mapping and point shadows) 5.3.1 shadow mapping Shadow is still difficult to implement, because a perfect shadow algorithm has not been found in the field of real-time rendering. At present, there are several approximate shadow techniques, but they all have their own weaknesses and shortcomings, which we ...

1. What is a business? In a series of operations on the database, ensure that they succeed or fail at the same time, and there can be no partial success or partial failure. This series of operations is called database transactions. 2. Characteristics of transactions Atomicity: refers to that a transaction is an inseparable work unit, ...

The old rule is to see if it's what you want Meituan: A graphic analysis Next, I want to write a simple example. First analyze the layout, as shown in the figure below. The outermost layer is NestedScrollView, and then nest a LinearLayout header, a TabLayout selector in the middle, and a ViewPager at the bottom. The ViewPager height needs ...

1. Introduction to network programming link 1.1 what is a computer network? packet What is a TCP connection? phone What is a UDP connection? send emails What is computer network? It refers to a computer system that connects multiple computers and their external devices with independent functions in different geographical locations throug ...

preface Tip: Here you can add the general contents to be recorded in this article: For example, with the continuous development of artificial intelligence, machine learning technology is becoming more and more important. Many people have started learning machine learning. This paper introduces the basic content of machine learning. T ...

ASP.NET Core project starts. The default execution sequence is: Host - > read configuration - > log settings - > registration service (DI) - > Add Middleware - > webhost listening - > background Work start.The loading and reading of configuration is at the beginning of the startup process. Microsoft about ASP Configuration ...

1, Configuration:A centos ECS: Let's mainly talk about some of my problems here. Don't choose too high centos system version, otherwise it may not be set successfully. My setting here is centos7 2-bit linux alicloud server.Say important things three times (otherwise I must step on the pit. I found out the reason after the third day): CentOS 7 2 ...

subject 2055. Plates between candles Method 1: dichotomy + prefix and Algorithm flow: Data preprocessing: scan the string s from front to back, record the candle subscript in the array list (the array is strictly incremented - binary basis), and preprocess the prefix and array of the plateTraverse queries: For any query ...

introduction At present, the support of flash in the browser is getting worse and worse. The new version of Google has abandoned Flash support, and the conventional rtmp video streaming basically can not meet the technical requirements. At present, the solution is to convert rtmp to hls for playback. Under normal circumstances, the hls playbac ...