Seating arrangement problem in a circular table [closed] - python-3.x

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N people sit around a circular table. You have to find the probability that two particular people won't be sitting together.
The input will have the number N and the output should have the probability printed as a float type number rounded off to four decimal places.

Here's the link for the derived formula
You can find the step by step derivation over there
Here's the simple python implementation as per the thread
n = 5
result = (n-3)/(n-1)
print(result)

n= int(input())
import math
print(round(1-math.factorial(n-2)*math.factorial(2)/math.factorial(n-1),4))

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How to make radius input automatically appear (Python 3) [closed]

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I'm trying to write a program that takes the input, radius given by the user.
For example:
If radius is 2.
I want the program to output:
"The volume of this sphere with radius 2 is: 33.51"
I have used the variable a to store the radius that the user inputs.
So far, I have printed
print("The volume of this sphere with radius a is:", ).
What am I missing?
You can use f-string for this:
print(f'The volume of this sphere with radius a is:{4*math.pi*a**3/3}')

How to read the arithmetic operators as input in python [closed]

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How to take operator as input and how to perform operations using tat operator
I have tried using functions
If we provide the input 2,5,+. the program should give output as 7.
I'm not going to give you all of the code, but here's a good starting point.
In Python, check out the operator module:
>>> import operator
>>> sum = operator.add(2, 5)
>>> sum
7
>>> diff = operator.sub(2, 5)
>>> diff
-3

How to find the number of common characters of two input strings in Assembly? [closed]

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I need to compare two input strings and display the number of common characters in Assembly but i can't find how to do that.
To do it efficiently you would need some sort of data structure to remember which characters you have seen already.
If you don’t mind duplicates and don't need efficiency, you could loop over the first string and, for each character, loop over the second string and compare them (adding one to a register or a variable when they match).

How to draw a kernel density plot using Haskell [closed]

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I have a set of timestamps (each corresponding to a student submission), and I wanted to take a look at them graphically. I know criterion uses a KDE and makes a nice plot, and it looks like it depends on the statistics package, which provides a kde function, but I couldn't trace through the code of criterion to see how it's being used.
Ideally, and answer would at least be a snippet of code that produces a picture. An explanation of what criterion does in this case would also be welcome.

Floating-point in Python vs Mathematica [closed]

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Given the limited hardware and its memory we encounter float-point problem. My questions is, how come in Python: 0.1 + 0.1 + 0.1 == 0.3 returns False while Mathematica returns it True?
How did Wolfram guys managed it to work and can Python developers implement their solution?
From the Wolfram documentation at https://reference.wolfram.com/language/ref/Equal.html
Approximate numbers with machine precision or higher are considered equal if they differ in at most their last seven binary digits (roughly their last two decimal digits).
So it's just a different rule for == comparisons.

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