classPolinom

import math
class Polinom:
    def __init__(self, gr, coef):
        if (len(coef)-gr)==1:
            self.grad=gr
            coef.reverse()
            self.coeficienti = coef
        else:
            raise Exception ("Parametrii incorecti")

    def __repr__(self):
        g=self.grad
        self.coeficienti.reverse()
        v=self.coeficienti
        self.coeficienti
        s="{}x^{}".format(v[0],g)
        for i in range (1, len(v)):
            g=g-1
            if v[i] >0 and i!=(len(v)-1):
                s=s+"+{}x^{}".format(v[i],g)
            if v[i] <0 and i!=(len(v)-1):
                s=s+"+({})x^{}".format(v[i],g)
            if i==(len(v)-1):
                s=s+"+{}".format(v[i])
        return s

    def calcul(self,x):
        suma=0
        for i in range(0, len(self.coeficienti)):
            monom=self.coeficienti[i]*x^i
            suma=suma + monom
        return suma

    def __add__(self, q):
        if self.grad == q.grad:
            v=[]
            for i in range(0, len(self.coeficienti)):
                el=self.coeficienti[i]+q.coeficienti[i]
                v.append(el)
            p = Polinom(self.grad,v)
            return p


p=Polinom(4,[5,2,-1,0,7])
p2=Polinom(4,[2,5,-1,7,8])
print (p)
print (p.calcul(2))
print(p+p2)