#!/usr/bin/env python3

poly_derivative = __import__('10-matisse').poly_derivative

poly = [5, 3, 0, 1]
print(poly_derivative(poly))

poly = [25, 0, -11, 13]
print(poly_derivative(poly))
poly = [5]
print(poly_derivative(poly))
poly = [5, 'a', 0, 1]
print(poly_derivative(poly))
poly = [0, 0, 0, 1]
print(poly_derivative(poly))
poly = [9, 0, 0, 0]
print(poly_derivative(poly))
