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Yes, you have to do it in the child process. If you do it in the parent, you get 20 identical copies of the parent, and 20 identical copies of the parent's seed, and 20 identical random numbers. I...

If you put the same seed in, you get the same numbers out.

time() only changes once a second. How long does your program take to run? Less than a second?

That's why I suggested putting the...