Computer Science

Show the status of deque after each operation.

peek()
insertFront(12)
insertRear(67)
deletionFront()
insertRear(43)
deletionRear()
deletionFront()
deletionRear()

Python Queue

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Answer

peek()#Empty
insertFront(12)12
↑↑
f r
insertRear(67)1267
fr
deletionfront()67
↑↑
f r
insertRear(43)6743
fr
deletionRear()67
↑ ↑
f r
deletionfront()#Empty
deletionRear()Underflow

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