 # [Do the problem is also a game] URL

01.03. Urlization. Write a method to replace all Spaces in a string with %20. Assume that there is enough space at the end of the string for new characters and that you know the "real" length of the string. (Note: If implemented in Java, use character arrays to operate directly on arrays.) The value is in the range of [0, 500000]...

# List the entrance of the central node | punch brush

Given a linked list, find the entry node of the linked list's ring if it contains rings, otherwise, null. The first pointer p1 points to head, and the second pointer P2 points to head.next. Then the loop starts every time the first pointer takes one step forward and the second pointer takes two steps forward. If p1 = =...

# Deeplab series principle

The Deeplab series model has undergone four times of improvement. Deeplabv1 was proposed in 2015, Deeplabv2 in 2017, Deeplabv3 in 2017, and Deeplabv3+ in 2018.

# 225. Implement stacks with queues

-- # List of topics: Juejin, Github, SmartBlue, Cyanosis, Channing-Cyan, Fancy, hydrogen, Condense-night-purp

# Prim algorithm

The priM algorithm of minimum spanning tree has not been learned, and it seems that the most short circuit will also use this idea, so today I learned, looked for a lot of blogs, algorithm diagrams are quite good, but the code implementation is very complex, and finally found a template problem solving blog to read the code implementation. Prim algorithm in fact, the idea is very simple, is constantly find the current distance has generated the tree node to add to the tree, until all nodes into the tree...

# Three puzzles on graph theory search

Water Puzzle is a classic Puzzle. Here's how to solve the problem: Fill a 9-liter bucket with water; Fill the 4-liter bucket with water by filling the 9-liter bucket with water

# Use the Moore vote to settle most questions

Boyer -- Moore majority voting algorithm (英 文 : Boyer -- Moore majority voting algorithm) is a kind of algorithm used to find the majority of elements in a group of elements

# Python Tensorflow neural network for stock prediction

Neural network (NN) is a distributed parallel information processing algorithm mathematical model that imitates the behavior characteristics of animal neural network. Depending on the complexity of the system, the network can process information by adjusting the relationship between a large number of internal nodes. If the amount of data provided is large enough, the neural network can fit any function relation between input and output. Tensorflow is a...

# Tree Story -- B tree/B+ tree

This article elaborates the principle of multi-way search tree, suitable for beginners to read, as well as veteran review. The full text is 2000 words and the reading time is 10 minutes. If you have used MySQL, you must be familiar with the B+ tree, the MySQL index structure is B+ tree. The idea of a B+ tree is that it's above a B tree, and what is a B tree? B tree data (or Pointers to data) exists for every...

# "String" leetcode 14. Longest public prefix (easy)

Write a function to find the longest public prefix in an array of strings. Returns the empty string "" if no public prefix exists. According to the above question, let's write down the solution idea:

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