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

Collections.deque()

  • fam_lee_top
     + 0 comments
    if __name__ == '__main__':
    from collections import deque
    operation_count = int(input())
    que = deque()
    for _ in range(operation_count):
        operation = str(input()).split(" ")
        if operation[0] == 'append':
            que.append(operation[1])
        if operation[0] == 'appendleft':
            que.appendleft(operation[1])
        if operation[0] == 'pop':
            que.pop()
        if operation[0] == 'popleft':
            que.popleft()
            
    for value in que:
        print(value, end=" ")