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python, using list
class Solution: def __init__(self): self.stack = [] self.queue = [] def pushCharacter(self, ch): self.stack.append(ch) def enqueueCharacter(self, ch): self.queue.append(ch) def popCharacter(self): return self.stack.pop() def dequeueCharacter(self): return self.queue.pop(0)
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Day 18: Queues and Stacks
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python, using list