jae_coding

문제 문제 링 코드 import sys from collections import deque input = sys.stdin.readline def push(lst, num): lst.append(num) def pop(lst): if len(lst) != 0: print(lst[0]) lst.popleft() else: print(-1) def size(lst): print(len(lst)) def empty(lst): if len(lst) != 0: print(0) else: print(1) def front(lst): if len(lst) != 0: print(lst[0]) else: print(-1) def back(lst): if len(lst) != 0: print(lst[-1]) else: ..