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Cars coming from the north and south must pass a bridge across a river. Unfortunately, there is only one lane on the bridge. So at
Cars coming from the north and south must pass a bridge across a river. Unfortunately, there is only one lane on the bridge. So at any moment, it can be crossed by one or more cars coming from the same direction (but not from opposite directions). Write an algorithm using semaphores, for a southern and a northern car as they arrive at the bridge, cross it, and depart on the other lane.
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