优化目标: 12行82步
JUMP init out: COPYFROM 1 zero: OUTBOX init: INBOX JUMPZ zero COPYTO 0 main: COPYTO 1 BUMPDN 0 JUMPZ out ADD 1 JUMP main
JUMP init out: COPYFROM 1 OUTBOX init: INBOX COPYTO 0 main: COPYTO 1 BUMPDN 0 JUMPN out JUMPZ out ADD 1 JUMP main