## 2104. Subarray range and

link
2104. Subarray range and
subject
Give you an integer array nums. In nums, the range of subarray is the difference between the largest element and the smallest element in the subarray.
Returns the sum of all subarray ranges in num.
A subarray is a sequence of consecutive non empty elements in an array.
Examples
Example 1: I ...

Added by **elklabone** on *Sat, 05 Mar 2022 02:09:38 +0200*

## Sets and strings

Sets and strings
aggregate
1. Recognition set
'''
A collection is a container type data type. Take {} as the flag of the container. Multiple data in it are separated by commas: {data 1, data 2, data 3,...}
Variable (support addition, deletion and modification); Unordered (subscript operation is not supported)
Requirements for elements: 1 ...

Added by **olko** on *Sat, 05 Mar 2022 00:59:17 +0200*

## Real topic of the 11th Java group B Blue Bridge Cup

Write in front
Time flies, time flies, in a trance, the start of the Blue Bridge Cup is close at hand.. Why is it so official... Cough, the game will start tomorrow. As the saying goes, whet your gun when you are ready, you will be unhappy! Adhering to the excellent expertise of the Chinese nation, I came to brush the real problem of last year ...

Added by **kingman65** on *Sat, 05 Mar 2022 00:55:05 +0200*

## Simple practice of logistic regression and record of problems encountered

Objective: to predict whether a college student can be admitted to the university according to the score.
Methods: call the advanced optimization algorithm or write the gradient descent function (choose the learning rate and iteration times by yourself)
Data: ex2data1 txt
1, Read in data.
1.1 INTRODUCTION Kit
import numpy as np
import pa ...

Added by **fullyscintilla** on *Fri, 04 Mar 2022 21:59:56 +0200*

## [algorithm practice] Blue Bridge Cup C++ AB group counseling topic list: Lecture 1 and 2 (Java solution version)

Anyway, brother y said that he would definitely enter the national competition after brushing. I'll try~
1, Recursion and recursion
92. Recursive implementation of exponential enumeration (simple)
Note that this problem is to solve the combination!!
import java.util.LinkedList;
import java.util.Scanner;
public class Main {
static Link ...

Added by **Melville** on *Fri, 04 Mar 2022 20:53:45 +0200*

## Java data structure and algorithm -- in situ hash algorithm

In situ hash algorithm
The in-situ hash algorithm is used to solve the problem with spatial complexity of O(1), and the result range is between [0, len (Num)], and num is the solution array provided by the problem.
The in-situ hash algorithm is mainly used in the array solution with the result range of [0, len (Num)]. The space complexity is ...

Added by **wisewood** on *Fri, 04 Mar 2022 20:30:33 +0200*

## [expression recognition] facial expression recognition based on sparse representation feature template matching algorithm, including Matlab source code

1 Introduction
With the development of pattern recognition, image processing and machine learning, fast and effective automatic recognition and verification technology has attracted extensive attention because of its great theoretical and practical application value. As an important verification means in biometrics, face recognition has achiev ...

Added by **bidntrade** on *Fri, 04 Mar 2022 19:58:53 +0200*

## The first trial of HNUCM ladder competition

A: Color overlay
Title Description Kimi, who loves science, has been studying various colors. Today he plans to do a small experiment on color superposition. Kimi has many blue and yellow rectangular transparent plastic cards. As we all know, if blue and yellow are mixed together, they will turn green. Therefore, Kimi can see green by look ...

Added by **bigbob** on *Fri, 04 Mar 2022 17:07:07 +0200*

## Detailed explanation of emotion analysis using two-way LSTM

1, Principle introduction
RNN can remember context information, so it is often used to process time series data. In theory, RNN can memorize infinite length of historical information, but due to the accumulation of gradients, the amount of calculation is too large to be operated in practice. Therefore, in practice, RNN can only record the info ...

Added by **Randomizer** on *Fri, 04 Mar 2022 16:53:07 +0200*

## Leetcode one question per day (two questions) - 3.4 + 3.3

Leetcode one question per day (two questions) - 3.4 + 3.3
preface
I wrote the daily question of these two days, learned some new knowledge points, and made a comb and summary.
3.3 add up
Given a non negative integer num, the numbers on each bit are added repeatedly until the result is a single digit. Return this result.
Title Link ...

Added by **rsnell** on *Fri, 04 Mar 2022 16:16:11 +0200*