1518. Water Bottles

Given numBottles full water bottles, you can exchange numExchange empty water bottles for one full water bottle.

The operation of drinking a full water bottle turns it into an empty bottle.

Return the maximum number of water bottles you can drink.

 

Example 1:



Input: numBottles = 9, numExchange = 3
Output: 13
Explanation: You can exchange 3 empty bottles to get 1 full water bottle.
Number of water bottles you can drink: 9 + 3 + 1 = 13.
Example 2:



Input: numBottles = 15, numExchange = 4
Output: 19
Explanation: You can exchange 4 empty bottles to get 1 full water bottle. 
Number of water bottles you can drink: 15 + 3 + 1 = 19.
Example 3:

Input: numBottles = 5, numExchange = 5
Output: 6
Example 4:

Input: numBottles = 2, numExchange = 3
Output: 2
 

Constraints:

1 <= numBottles <= 100
2 <= numExchange <= 100

这题模拟一下即可。

class WaterBottles : public Solution {
public:
    void Exec() {

    }
    int numWaterBottles(int numBottles, int numExchange) {
        int drink = numBottles, empty = numBottles;
        while (empty >= numExchange) {
            int full = empty / numExchange;
            drink += full;
            empty = empty - full * numExchange + full;
        }
        return drink;
    }
};