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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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...