📌문제설명 📌문제풀이 소스코드 import sys class Queue: def __init__(self): self.queue = [] def push(self, x): self.queue.append(x) def pop(self): if len(self.queue) !=0: print(self.queue.pop(0)) else: print(-1) def size(self): print(len(self.queue)) def empty(self): if len(self.queue) == 0: print(1) else: print(0) def front(self): if len(self.queue) == 0: print(-1) else: print(self.queue[0]) def back(self): i..