1. 1.
    +1
    ____________________$____________________
    ___________________$$$___________________
    ___________________$$$___________________
    __________________$$$$$__________________
    __________________$$$$$__________________
    __________________$$$$$__________________
    __$$______________$$$$$____________$$____
    ___$$$____________$$$$$___________$$$____
    ____$$$$$_________$$$$$________$$$$$_____
    _____$$$$$$$______$$$$$_____$$$$$$$______
    _______$$$$$$$____$$$$$___$$$$$$$________
    __________$$$$$____$$$___$$$$$___________
    _$$$$$$$______$$$__$$$__$$$______$$$$$$$_
    _____$$$$$$$$____$$_$_$$____$$$$$$$$_____
    _________$$$$$$$$$_$$$_$$$$$$$$$_________
    ________________$$$_$_$$$________________
    ____________$$$$$___$___$$$$$____________
    ___________$________$________$___________
    ____________________$____________________
    ···
  2. 2.
    0
    reserved
    ···