171

leetcode/171. Excel Sheet Column Number/README.md

@@ -1,48 +1,53 @@
 # [171. Excel Sheet Column Number (Easy)](https://leetcode.com/problems/excel-sheet-column-number/)
 
-<p>Given a column title as appear in an Excel sheet, return its corresponding column number.</p>
+<p>Given a string <code>columnTitle</code> that represents the column title as appear in an Excel sheet, return <em>its corresponding column number</em>.</p>
 
 <p>For example:</p>
 
-<pre>    A -&gt; 1
-    B -&gt; 2
-    C -&gt; 3
-    ...
-    Z -&gt; 26
-    AA -&gt; 27
-    AB -&gt; 28 
-    ...
+<pre>A -&gt; 1
+B -&gt; 2
+C -&gt; 3
+...
+Z -&gt; 26
+AA -&gt; 27
+AB -&gt; 28 
+...
 </pre>
 
+<p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<pre><strong>Input:</strong> "A"
+<pre><strong>Input:</strong> columnTitle = "A"
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 2:</strong></p>
 
-<pre><strong>Input: </strong>"AB"
+<pre><strong>Input:</strong> columnTitle = "AB"
 <strong>Output:</strong> 28
 </pre>
 
 <p><strong>Example 3:</strong></p>
 
-<pre><strong>Input: </strong>"ZY"
+<pre><strong>Input:</strong> columnTitle = "ZY"
 <strong>Output:</strong> 701
 </pre>
+
 <p>&nbsp;</p>
 <p><strong>Constraints:</strong></p>
 
 <ul>
-	<li><code>1 &lt;= s.length &lt;= 7</code></li>
-	<li><code>s</code> consists only of uppercase English letters.</li>
-	<li><code>s</code> is between "A" and "FXSHRXW".</li>
+	<li><code>1 &lt;= columnTitle.length &lt;= 7</code></li>
+	<li><code>columnTitle</code> consists only of uppercase English letters.</li>
+	<li><code>columnTitle</code> is in the range <code>["A", "FXSHRXW"]</code>.</li>
 </ul>
 
 
+**Companies**:  
+[Microsoft](https://leetcode.com/company/microsoft), [Bloomberg](https://leetcode.com/company/bloomberg)
+
 **Related Topics**:  
-[Math](https://leetcode.com/tag/math/)
+[Math](https://leetcode.com/tag/math/), [String](https://leetcode.com/tag/string/)
 
 **Similar Questions**:
 * [Excel Sheet Column Title (Easy)](https://leetcode.com/problems/excel-sheet-column-title/)