Thread $1$ handles Player $1$s behavior; Thread $2$ handles Player $2$s behavior. Both threads share a common structure.

Loop forever

Set min to $0$ and max to $100$Lock mutex $3$Using a while loop, wait on condition variable $3.$

In my code base this was implemented as a while$(!$rdy$)$ cond$\_$wait$()$ loop. The following loop is for thread $1$

while $($rdy$[2]==0)$ pthread$\_$cond$\_$wait$($&cnd$[2],$ &mtx$[2])$;

$($note: both players are waiting on the cnd$[2],$ mtx$[2]$ pairing$)$Unlock mutex $3$ and set the rdy flag you were looping over to $0$Loop forever

Calculate the child$$s guess using the proper method $($See below$)$Store that guess in the proper global variable.Lock the mutex associated with the thread$$s guess $($See below$)$Using a while loop, wait on the associated condition variable $($See below$)$Unlock the proper mutex $($See below$)$Once this condition variable has been signaled, the value of the referee$$s response should be stored in the cmp global. Using the proper element of the cmp global do the following:

If cmp $<0,$ set min to the current guessIf cmp $>0,$ set max to the current guessIf cmp is $0,$ break.

I suggest using the following values for Thread $1$:

use mtx$[0]$ as the thread's mutex for its guess

use cnd$[0]$ and rdy$[0]$ as your condition variable and associated state

use guess$[0]$ and cmp$[0]$ to store thread $1\text{'}$s guess and the referee's response