#!/usr/bin/python

#coding=utf-8


__author__ = 'JinyouHu'


import cmath

print(cmath.sqrt(-1))

print((1+3j)*(9+4j))


print(repr("hello world"))

print("hello world " + str(43))

print('''
hello world,
this is JoyousHu,
what's your name ?
''')

print(r"C:\nowwhere")