https://www.hackerrank.com/challenges/input
In Python 2, the expression input() is equivalent to eval(raw _input(prompt)).
Task
You are given a polynomial P of a single indeterminate (or variable), x.
You are also given the values of x and k. Your task is to verify if P(x) = k.
Input Format
The first line contains the space separated values of x and k.
The second line contains the polynomial P.
Sample Input 0
1 4
x**3 + x**2 + x + 1
Sample Output 0
True