@0
MOV UP RIGHT

@1
SUB LEFT
MOV LEFT NIL
MOV LEFT RIGHT

A: MOV ACC RIGHT
JMP A

@2
MOV UP NIL
MOV LEFT DOWN
B: MOV UP ACC
MOV -999 DOWN
ADD LEFT
JEZ B
MOV UP ACC
MOV ACC DOWN
ADD LEFT
JEZ B

@3


@4


@5


@6
SUB UP
A: MOV UP DOWN
MOV ACC DOWN
JMP A

@7


@8


@9


@10
MOV 0 DOWN
ADD UP
JNZ A

B: MOV UP ACC
MOV 1 DOWN
ADD UP
A: MOV UP ACC