可以输入kill 4009命令来停止该程序，或者在您退出会话时，该页面将会消失。
You can halt the program by typing the kill 4009 command, or the page will disappear when you leave your session.
从积木数量值的下一行开始是一系列的命令，每条命令独占一行。你的程序要处理所有的命令直到输入退出命令。
The number of blocks is followed by a sequence of block commands, one command per line. Your program should process all commands until the quit command is encountered.
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