The answer part references GPT, GPT_Pro better solve the problem
Each assignment in the begin-end block takes a time unit, So this begin-end block takes 12 time units to complete.
Specifically, the first statement y1= #5A^B takes 5 time units to complete, and the second statement y2< =#3AIB takes 3 time units to complete, the third statement. =#2A& B takes 2 time units, and the last statement y4= #4(-B) takes 4 time units. That adds up to 12 time units.
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