<p>The string <code>&quot;PAYPALISHIRING&quot;</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>&quot;PAHNAPLSIIGYIR&quot;</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 = &quot;PAYPALISHIRING&quot;, numRows = 3
<strong>Output:</strong> &quot;PAHNAPLSIIGYIR&quot;
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> s = &quot;PAYPALISHIRING&quot;, numRows = 4
<strong>Output:</strong> &quot;PINALSIGYAHRPI&quot;
<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 = &quot;A&quot;, numRows = 1
<strong>Output:</strong> &quot;A&quot;
</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>&#39;,&#39;</code> and <code>&#39;.&#39;</code>.</li>
	<li><code>1 &lt;= numRows &lt;= 1000</code></li>
</ul>

class Solution:
    def convert(self, s: str, numRows: int) -> str:
        ans = []
        ans_str = []
        for i in range(numRows):
            ans.append([])
        cur_col = 0
        cur_ind = 0
        if numRows == 1:
            return s
        while cur_ind < len(s):
            for i in range(numRows):
                if cur_col % (numRows - 1) != 0:
                    if i == (numRows - 1 - (cur_col % (numRows-1))):
                        if cur_ind < len(s):
                            ans[i].append(s[cur_ind])
                            cur_ind += 1
                        else:
                            ans[i].append('-')
                    else:
                        ans[i].append('-')
                else:
                    if cur_ind < len(s):
                        ans[i].append(s[cur_ind])
                        cur_ind += 1
                    else:
                            ans[i].append('-')
            cur_col += 1

        for i in range(numRows):
            for j in range(cur_col):
                print(ans[i][j], end = " ")
                if ans[i][j] != "-":
                    ans_str.append(ans[i][j])
            print()
        return ''.join(ans_str)

        

        
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