Shenzhen I/O #2 - Control Signal Amplifier
Today we’re doing another Shenzhen I/O puzzle.
As this is the second task, the puzzle is again quite simple. As a reminder, we do have the following command documentation:
The task is to amplify a signal. As we can see from the verification tab the output has to be higher than the input - twice as high, to be precise.
This seems fairly easy, we just need to multiply the input signal with
2 and output the result.
If we take a closer look on our commands we can find a
mul operator which can take one argument.
It is documented with the following:
mul R/I Multiply the value of the first operand by the value of the acc register and store the result in the acc register.
So this makes things a bit more complicated. We can not simply take register
p0 and multiply it with integer
The argument for
mul always gets multiplied with the register
Therefore we need to do a little extra step and save
After that we can multiply register
p0 with integer
2 saved in
acc which automatically stores the result again in
Now we need to move the result from
acc to register
p1 - our output - and sleep for one second.
mov 2 acc mul p0 mov acc p1 slp 1
With these four lines we pass all the tests easily.
|Production Cost||Power Usage||Lines of Code|