Question: Add the necessary flags to synchronize operations A, B, C, and D. So that A and B complete, they may be executed concurrently before implementing
Add the necessary flags to synchronize operations A, B, C, and D. So that A and B complete, they may be executed concurrently before implementing C or D, but C and D may be executed concurrently. You must use minimum number of semaphore variables such as possible.

Semaphore
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