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Introfor

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from sys import stdin from collections import deque if __name__ == '__main__': n = int(stdin.readline()) Deque = deque() for _ in range(n): cmd = stdin.readline().split() if cmd[0] == 'push_front': Deque.appendleft(cmd[1]) elif cmd[0] == 'push_back': Deque.append(cmd[1]) elif cmd[0] == 'pop_front': if len(Deque) == 0: print(-1) else: print(Deque.popleft()) elif cmd[0] == 'pop_back': if len(Deque..
카테고리 없음 2020. 9. 12. 21:08
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