One thing I forgot to mention (but it seems you already took care of it in a way) is to initially set your minimum value very high (so the only place it can go is down) and your maximum value very low (so the only place it can go is up)...
One thing I forgot to mention (but it seems you already took care of it in a way) is to initially set your minimum value very high (so the only place it can go is down) and your maximum value very low (so the only place it can go is up)...
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