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

Collections.deque()

  • fazepavan
     + 0 comments
    from collections import deque
n = int(input())
d = deque()
for n in range(n):
    cmd = input().split()
    operation = cmd[0]
    if operation == "append":
        d.append(int(cmd[1]))
    elif operation == "appendleft":
        d.appendleft(int(cmd[1]))
    elif operation == "pop":
        d.pop()
    elif operation == "popleft":
        d.popleft()
        
print(*d)