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n = R1
i = 0

LOOP:
	if i > n goto END
	R2 = R0 + R2 // set adress to R2 and data to R0, M = M + D
	i++
	goto LOOP
END:
	goto END

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@R1
D=M
@n
M=D //set n to R1

@i
M=0 //set i to 0

@r
M=0 //set r to 0

(LOOP)
	@i
	D=M
	@n
	D=D-M
	@END
	D;JEQ //if i>n goto END
	
	@R0
	D=M
	@END
	D;JEQ //sets R2 to 0 if R0 = 0
	
	@R1
	D=M
	@END
	D;JEQ //sets R2 to 0 if R1 = 0
	
	@R0
	D=M //set D to R0
	@r
	M=D+M //adds R0 to r
	
	@i
	M=M+1 //i = i+1
	
	@LOOP
	0;JMP //rerun loop
	
(END)
	@r
	D=M
	@R2
	M=D
	@END
	0;JMP //infinite loop