【leetcode】】换酒问题

int numWaterBottles(int numBottles, int numExchange){
    
    int total = 0;
    int spaceBottels = 0;
    while(numBottles)
    {
        total+=numBottles;
        spaceBottels = numBottles + spaceBottels; //喝完之后加上之前的空瓶
        numBottles = spaceBottels / numExchange;  //空瓶除以换瓶数得到新瓶数
        spaceBottels = spaceBottels % numExchange; //换瓶后剩余空瓶
    }
    return total;
}