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Category: Mathematics

Applied Mathematics is a general term for mathematical theories and methods with a clear application purpose. The study of how to apply mathematical knowledge to the branches of mathematics in other categories (especially science) can be said to be the opposite of pure mathematics. Including differential equations, vector analysis, matrix, Fourier transform, complex analysis, numerical methods, probability theory, mathematical statistics, operations research, control theory, combinatorial mathematics, information theory and many other branches of mathematics, as well as from various application fields The study of the mathematical problem presented. Computational mathematics can sometimes be regarded as part of applied mathematics.

Differential search algorithms (non-recursive)

/**
* @param data Array with search (array)
* @param target target data
* @return returns the corresponding subscript, -1 means Not found
*/
public static int binarySearch(int[] data, int targ

October 17, 2021By Simo Mathematics 2 points, Algorithm, Find, non-recursive, Two pointsLeave a Comment

Non-boring sequences(分治)

We were afraid of making this question too boring, so we decided to make this question super short. A sequence is called not boring, only if there is a unique number in each successive subsequence,

October 17, 2021By Simo Mathematics boring, Non, Sequences, 分治Leave a Comment

[PAT Level] 1043 IS IT A Binary Search Tree (25 points) (Judge whether or not the BST is traversed and outputs traversal traversal)

Title:

Enter a positive integer N (<=1000), and then enter the serial number of N points. If the sequence just entered is a binary search tree or its mirror image (the center is flipped 180°)

October 17, 2021By Simo Mathematics Binary, BST, division, First, judgment, order, Output, PAT A, search, sequential, travers, traversal, Tree, whetherLeave a Comment

Division and recursive – FIBONACCI DVI Rabbit Problem

Fibonacci leonardo (about 1170-1250) is a famous Italian mathematician. Among the many interesting questions in his book “Abacus Book”, the most successful one is the famous “Rabbit Reproduction Pr

October 17, 2021By Simo Mathematics division, fibonacci, Number, problem, Rabbit, RecursiveLeave a Comment

Array – How to use any () on a multidimensional array?

I’m testing an arbitrarily large, arbitrarily sized logical array, and I want to know if one or more of them are true. any() can only be in one dimension at a time Works, so does sum(). I know I ca

October 17, 2021By Simo Mathematics array, How, multi-dimensional, useLeave a Comment

Use Group_by to find the percentage in the subgroup and summarize

I am new to dplyr and tried to make the following conversion without luck. I have searched on the internet and I found an example of doing the same in ddply, but I want to use dplyr .

I have

October 17, 2021By Simo Mathematics Find, Group, incorporated, line, Medium, percentage, Sub, Summary, useLeave a Comment

Data Structure and Algorithm – Arrange

An array is a data structure composed of a collection of elements of the same type, and a contiguous memory is allocated for storage. The index of the element can be used to calculate the storage a

October 17, 2021By Simo Mathematics Algorithm, array, data, structureLeave a Comment

Two-forked tree, full binary tree, full binary tree

Definition Tree node (node): contains a data element and several branches pointing to the subtree;

Child node: node The root of the subtree of a point is called the child of the node;

P

October 17, 2021By Simo Mathematics binary tree, complete, full, Two-forkLeave a Comment

Conversion of recursive functions to asynchronous CPS implementation (JavaScript)

This is my function.

function duplicate_step_through_highlighted (element_jq, target_jq, char_cb) {
console. log( element_jq);
var contents = element_jq.contents();
for (var i = 0; i }
}

October 17, 2021By Simo Mathematics asynchronous, conversion, CPS, function, Implementation, JavaScript, Recursive, willLeave a Comment

P1197 [JSoi2008] Star Wars – Chain Directive Star + Collection

https://www.luogu.org/problem/P1197

This question is an enhanced version of closing the farm. The data is a bit large, and the matrix cannot be saved;

It is also a record deletion opera

October 17, 2021By Simo Mathematics chain, check, front, JSoi, JSoi2008, P1197, set, Star, Star WarsLeave a Comment

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