HackerRank Python Solution - Numpy Topic - Polynomials

Poly:

The poly tool returns the coefficients of a polynomial with the given sequence of roots.

print numpy.poly([-1, 1, 1, 10])        #Output : [  1 -11   9  11 -10]

Roots:

The roots tool returns the roots of a polynomial with the given coefficients.

print numpy.roots([1, 0, -1])           #Output : [-1.  1.]

Polyint:

The polyint tool returns an antiderivative (indefinite integral) of a polynomial.

print numpy.polyint([1, 1, 1])          #Output : [ 0.33333333 0.5 1. 0. ]

Polyder:

The polyder tool returns the derivative of the specified order of a polynomial. 

print numpy.polyder([1, 1, 1, 1])       #Output : [3 2 1]

Polyval:

The polyval tool evaluates the polynomial at specific value. 

print numpy.polyval([1, -2, 0, 2], 4)   #Output : 34

Polyfit:

The polyfit tool fits a polynomial of a specified order to a set of data using a least-squares approach.

print numpy.polyfit([0,1,-1, 2, -2], [0,1,1, 4, 4], 2)
#Output : [  1.00000000e+00   0.00000000e+00  -3.97205465e-16]

The functions polyadd, polysub, polymul, and polydiv also handle proper addition, subtraction, multiplication, and division of polynomial coefficients, respectively. 

Task:

• You are given the coefficients of a polynomial P. 
• Your task is to find the value of P at point x.

Input Format:

• The first line contains the space-separated value of the coefficients in P.
• The second line contains the value of x. 

Output Format:

Print the desired value.

Sample Input:

1.1 2 3
0

Sample Output:

3.0

Solution:

import numpy

arr= numpy.array(input().split(),float)

x = int(input())

print(numpy.polyval(arr,x))

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