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+<h2><a href="https://leetcode.com/problems/zigzag-conversion/">6. Zigzag Conversion</a></h2><h3>Medium</h3><hr><div><p>The string <code>"PAYPALISHIRING"</code> is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)</p>
+
+<pre>P   A   H   N
+A P L S I I G
+Y   I   R
+</pre>
+
+<p>And then read line by line: <code>"PAHNAPLSIIGYIR"</code></p>
+
+<p>Write the code that will take a string and make this conversion given a number of rows:</p>
+
+<pre>string convert(string s, int numRows);
+</pre>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre><strong>Input:</strong> s = "PAYPALISHIRING", numRows = 3
+<strong>Output:</strong> "PAHNAPLSIIGYIR"
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre><strong>Input:</strong> s = "PAYPALISHIRING", numRows = 4
+<strong>Output:</strong> "PINALSIGYAHRPI"
+<strong>Explanation:</strong>
+P     I    N
+A   L S  I G
+Y A   H R
+P     I
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre><strong>Input:</strong> s = "A", numRows = 1
+<strong>Output:</strong> "A"
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= s.length &lt;= 1000</code></li>
+	<li><code>s</code> consists of English letters (lower-case and upper-case), <code>','</code> and <code>'.'</code>.</li>
+	<li><code>1 &lt;= numRows &lt;= 1000</code></li>
+</ul>
+</div>