██████╗ ██╗ ██╗███████╗████████╗██████╗ ██████╗ ██████╗ ██╗ ██╗
██╔══██╗██║ ██║██╔════╝╚══██╔══╝██╔══██╗██╔═══██╗██╔═══██╗██║ ██╔╝
██████╔╝██║ ██║███████╗ ██║ ██████╔╝██║ ██║██║ ██║█████╔╝
██╔══██╗██║ ██║╚════██║ ██║ ██╔══██╗██║ ██║██║ ██║██╔═██╗
██║ ██║╚██████╔╝███████║ ██║ ██████╔╝╚██████╔╝╚██████╔╝██║ ██╗
╚═╝ ╚═╝ ╚═════╝ ╚══════╝ ╚═╝ ╚═════╝ ╚═════╝ ╚═════╝ ╚═╝ ╚═╝
Exercises from The Book (Second Edition).