Water Bottles II
<p>You are given two integers <code>numBottles</code> and <code>numExchange</code>.</p>

<p><code>numBottles</code> represents the number of full water bottles that you initially have. In one operation, you can perform one of the following operations:</p>

<ul>
	<li>Drink any number of full water bottles turning them into empty bottles.</li>
	<li>Exchange <code>numExchange</code> empty bottles with one full water bottle. Then, increase <code>numExchange</code> by one.</li>
</ul>

<p>Note that you cannot exchange multiple batches of empty bottles for the same value of <code>numExchange</code>. For example, if <code>numBottles == 3</code> and <code>numExchange == 1</code>, you cannot exchange <code>3</code> empty water bottles for <code>3</code> full bottles.</p>

<p>Return <em>the <strong>maximum</strong> number of water bottles you can drink</em>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/3100-3199/3100.Water%20Bottles%20II/images/exampleone1.png" style="width: 948px; height: 482px; padding: 10px; background: #fff; border-radius: .5rem;" />
<pre>
<strong>Input:</strong> numBottles = 13, numExchange = 6
<strong>Output:</strong> 15
<strong>Explanation:</strong> The table above shows the number of full water bottles, empty water bottles, the value of numExchange, and the number of bottles drunk.
</pre>

<p><strong class="example">Example 2:</strong></p>
<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/3100-3199/3100.Water%20Bottles%20II/images/example231.png" style="width: 990px; height: 642px; padding: 10px; background: #fff; border-radius: .5rem;" />
<pre>
<strong>Input:</strong> numBottles = 10, numExchange = 3
<strong>Output:</strong> 13
<strong>Explanation:</strong> The table above shows the number of full water bottles, empty water bottles, the value of numExchange, and the number of bottles drunk.
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= numBottles &lt;= 100 </code></li>
	<li><code>1 &lt;= numExchange &lt;= 100</code></li>
</ul>
Math; Simulation
class Solution {
public:
    int maxBottlesDrunk(int numBottles, int numExchange) {
        int ans = numBottles;
        while (numBottles >= numExchange) {
            numBottles -= numExchange;
            ++numExchange;
            ++ans;
            ++numBottles;
        }
        return ans;
    }
};