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It can carry out addition, subtraction, multiplication and division, exponential operation, power operation, factorial operation, trigonometric function operation and logarithmic function operation. Because the previous ones are easy to handle, here I mainly explain that the operation of trigonometric function and logarithmic function can adop ...

Mapping method of single source shortest path Heat Wave Title Link: Heat Wave Analysis: for a relatively naked problem, directly build a drawing and set a template, and I will directly use spfa water. Code implementation: #include<iostream> #include<queue> #include<cstring> using namespace std; const int N=2510,M=12410; ...

This weekend, on a whim, I opened LeetCode to do a question: https://leetcode-cn.com/problems/number-of-enclaves/ Seeing the question, my first thought is: Start with the land on the edge and find its largest connected area. Set the marker bit for the found connected area to avoid duplication. After all the connecting areas of marginal land are ...

For a better reading experience, please go to: Paxton's little broken station 1, 01 Backpack 01 backpack is to take out several items from M items and put them in a backpack with space W. the volume of each item is W1, W2 to Wn, and the corresponding value is P1,P2 to Pn. 01 knapsack is the simplest problem in knapsack problem. 01 the ...

Problem description There are n kinds of goods, which have their own volume, value and certain quantity. How to maximize the total value of the items loaded in the backpack with a given capacity? Algorithmic thought Before solving the problem, for the convenience of description, first define some variables: vi represents the value of the ith ...

177. Convert the sorted array into a binary search tree with the lowest height Give a sort array (from small to large) and convert it into a binary search tree with the smallest height. class Solution: """ @param: A: an integer array @return: A tree node """ def sortedArrayToBST(self, A): # write your code her ...

Double ended queue wide search is a kind of Dijkstra algorithm, which mainly solves the shortest path problem in which the weight of the edge in the graph is only 0 or 1. Operation: Every time you take out elements from the team head and expand other elements 1. If the edge weight of an extended element is 0, the element is inserted into ...

LC031. Next Permutation 1, Title An arrangement of an integer array is to arrange all its members in sequence or linear order. For example, arr = [1,2,3], the following can be regarded as the arrangement of arr: [1,2,3], [1,3,2], [3,1,2], [2,3,1]. The next permutation of an array of integers refers to the next lexicographically ordered pe ...

1. Overview Bob Dylan is a great American poet and songwriter. His creative works contribute a lot to American culture and even to the culture of the whole world. This paper uses NLTK to extract nouns from Bob Dylan's lyrics, stores his lyrics in a hash table for word segmentation statistics, and visualizes the lyrics with high frequency using ...

definition Let's take a look at the example of playing cricket. Suppose you win a game today, it means a successful event. You played another game, but you lost. If you win a game today, it doesn't mean you will win tomorrow. Let's assign a random variable x to represent the number of wins. What is the possible value of X? It can be any value, ...