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class SubwayLine: def __init__(self, num_of_stn): self.num_of_stop_train_list = [0]*num_of_stn
def increaseNumOfStopTrain(self, idx): if self.num_of_stop_train_list[idx] == 0: self.num_of_stop_train_list[idx] += 1 else: self.setDangerAlert()
def decreaseNumOfStopTrain(self, idx): if self.num_of_stop_train_list[idx] == 1: self.num_of_stop_train_list[idx] -= 1
def getNumOfStopTrain(self, idx): return self.num_of_stop_train_list[idx]
def setDangerAlert(self): return False
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