import math class Complex(object): def init(self, real, imaginary): self.real = real self.imaginary = imaginary

def __add__(self, no):
    real = self.real + no.real
    imaginary = self.imaginary + no.imaginary
    return Complex(real,imaginary)

def __sub__(self, no):
    real = self.real - no.real
    imaginary = self.imaginary - no.imaginary
    return Complex(real,imaginary)

def __mul__(self, no):
    real = (self.real*no.real - self.imaginary*no.imaginary)
    imaginary = (self.real*no.imaginary + self.imaginary*no.real)
    return Complex(real,imaginary)

def __truediv__(self, no):
    try:
        real = (self.real*no.real + self.imaginary*no.imaginary)/((no.real)**2 + (no.imaginary)**2)
        imaginary = (self.imaginary*no.real - self.real*no.imaginary)/((no.real)**2 + (no.imaginary)**2)
        return Complex(real,imaginary)
    except ZeroDivisionError as e:
        return e

def mod(self):
    return Complex(math.sqrt(self.real**2 + self.imaginary**2),0)


def __str__(self):

    if self.imaginary == 0:
        result = "%.2f+0.00i" % (self.real)
    elif self.real == 0:
        if self.imaginary >= 0:
            result = "0.00+%.2fi" % (self.imaginary)
        else:
            result = "0.00-%.2fi" % (abs(self.imaginary))
    elif self.imaginary > 0:
        result = "%.2f+%.2fi" % (self.real, self.imaginary)
    else:
        result = "%.2f-%.2fi" % (self.real, abs(self.imaginary))
    return result