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  1. Prepare
  2. Python
  3. Collections
  4. Collections.deque()
  5. Discussions

Collections.deque()

  • samitdebnath435
     + 0 comments

    from collections import deque

    if name == 'main': N = int(input()) d = deque()

    for _ in range(N):

    command = input().split()
    operation = command[0]


    if operation == "append":
        d.append(int(command[1]))
    elif operation == "appendleft":
        d.appendleft(int(command[1]))
    elif operation == "pop":
        d.pop()
    elif operation == "popleft":
        d.popleft()


print(" ".join(map(str, d)))