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

Collections.deque()

  • dilajevolves
     + 0 comments
    # Enter your code here. Read input from STDIN. Print output to STDOUT
from collections import deque
d = deque()
for _ in range(int(input())):
    function = input().split()
    match function[0]:
        case "append":
            d.append(int(function[1]))
        case "pop":
            d.pop()
        case "popleft":
            d.popleft()
        case "appendleft":
            d.appendleft(int(function[1]))
print (" ".join(map(str,d)))