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+<h2>unknown-problem</h2><h3>Easy</h3><hr><div><p>Given <code>numBottles</code>&nbsp;full water bottles, you can exchange <code>numExchange</code> empty water bottles for one full water bottle.</p>
+
+<p>The operation of drinking a full water bottle turns it into an empty bottle.</p>
+
+<p>Return the <strong>maximum</strong> number of water bottles you can&nbsp;drink.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<p><strong><img alt="" src="https://assets.leetcode.com/uploads/2020/07/01/sample_1_1875.png" style="width: 480px; height: 240px;"></strong></p>
+
+<pre><strong>Input:</strong> numBottles = 9, numExchange = 3
+<strong>Output:</strong> 13
+<strong>Explanation:</strong> You can exchange 3 empty bottles to get 1 full water bottle.
+Number of water bottles you can&nbsp;drink: 9 + 3 + 1 = 13.
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<p><img alt="" src="https://assets.leetcode.com/uploads/2020/07/01/sample_2_1875.png" style="width: 790px; height: 290px;"></p>
+
+<pre><strong>Input:</strong> numBottles = 15, numExchange = 4
+<strong>Output:</strong> 19
+<strong>Explanation:</strong> You can exchange 4 empty bottles to get 1 full water bottle. 
+Number of water bottles you can&nbsp;drink: 15 + 3 + 1 = 19.
+</pre>
+
+<p><strong>Example 3:</strong></p>
+
+<pre><strong>Input:</strong> numBottles = 5, numExchange = 5
+<strong>Output:</strong> 6
+</pre>
+
+<p><strong>Example 4:</strong></p>
+
+<pre><strong>Input:</strong> numBottles = 2, numExchange = 3
+<strong>Output:</strong> 2
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;=&nbsp;numBottles &lt;= 100</code></li>
+	<li><code>2 &lt;=&nbsp;numExchange &lt;= 100</code></li>
+</ul></div>