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- Prepare
- Python
- Collections
- Collections.deque()
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Collections.deque()
Collections.deque()
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from collections import deque d = deque() N = int(input()) for i in range(N): INput = input().split() if INput[0] == "append": d.append(INput[1]) elif INput[0]=="appendleft": d.appendleft(INput[1]) elif INput[0]=="popleft": d.popleft() else: d.pop()
for i in d: print(i, end=' ')
from collections import deque d = deque() N = int(input()) for i in range(N): INput = input().split() if INput[0] == "append": d.append(INput[1]) elif INput[0]=="appendleft": d.appendleft(INput[1]) elif INput[0]=="popleft": d.popleft() else: d.pop()
for i in d: print(i, end=' ')
for i in d: print(i, end=' ')
from collections import deque
d = deque()
N = int(input()) for i in range(N): in_put = input().split()
for i in range(len(d)): print(d[i], end=" ")