not if you place them on at the same time.
If you do them in a way that is off-timing, it'll make the population disappear by 50% then 50% of 50%. The effect stacks if you time it perfectly.
Yes I know and there is a such thing as the “planck length” which is such a small amount of time that due to time dilation and relativity, it would be impossible to prove that you actually did stack up. It’s a strange concept