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Merged
ppiyaki97 merged 1 commit into from
May 16, 2023
Merged

[Baekjoon] 23-05-15 #642

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39 changes: 39 additions & 0 deletions Baekjoon/초급자_큐/덱_홍진욱.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,39 @@
from collections import deque
import sys

deq = deque()

n = int(sys.stdin.readline())
for i in range(0, n):
command = sys.stdin.readline().split()
if command[0] == "push_front":
deq.appendleft(int(command[1]))
elif command[0] == "push_back":
deq.append(int(command[1]))
elif command[0] == "pop_front":
if len(deq)>0:
print(deq.popleft())
else:
print("-1")
elif command[0] == "pop_back":
if len(deq)>0:
print(deq.pop())
else:
print("-1")
elif command[0] == "size":
print(len(deq))
elif command[0] == "empty":
if len(deq)==0:
print("1")
else:
print("0")
elif command[0] == "front":
if len(deq)>0:
print(deq[0])
else:
print("-1")
elif command[0] == "back":
if len(deq)>0:
print(deq[-1])
else:
print("-1")