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Hackerrank Polynomials Solution

Hackerrank Polynomials Solution

Beeze Aal
Beeze Aal


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]


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

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


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

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


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

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


The polyval tool evaluates the polynomial at specific value.

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


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.


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

Input Format

The first line contains the space separated value of the coefficients in .
The second line contains the value of .

Output Format

Print the desired value.

Sample Input

1.1 2 3

Sample Output


Solution in python3

Approach 1.

import numpy

Approach 2.

import numpy
print(numpy.polyval(tuple(map(float, input().split())), float(input())))

Approach 3.

import numpy
print (numpy.polyval(list(map(float, input().split())), float(input())))

Solution in python

Approach 1.

import numpy as np
A = map(float,raw_input().split())
print np.polyval(A,input())

Approach 2.

import numpy
print numpy.polyval(map(float,raw_input().split()),float(raw_input()))

Approach 3.

import numpy
print numpy.polyval(map(float, raw_input().split()), float(raw_input()))