Siz quyidagicha ikkita to'plamdan foydalanib navbatni amalga oshirishingiz mumkin: ``` python sinfi Navbat: def init ((self): self.in_stack = [] self.out_stack = [] def enqueue ((self, item): self.in_stack.append ((item) def dequeue ((self): agar self.out_stack bo'lmasa: self.in_stack: self.out_stack.append ((self.in_stack.pop)) qaytarish self.out_stack.pop ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
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