Solution (leetcode-in-java 1.19 API)

java.lang.Object
- g0101_0200.s0171_excel_sheet_column_number.Solution

```
public class Solution
extends Object
```
171 - Excel Sheet Column Number.
Easy

Given a string columnTitle that represents the column title as appear in an Excel sheet, return its corresponding column number.

For example:
```
 A -> 1
 B -> 2
 C -> 3
 ...
 Z -> 26
 AA -> 27
 AB -> 28
 ... 
```
Example 1:

Input: columnTitle = “A”

Output: 1

Example 2:

Input: columnTitle = “AB”

Output: 28

Example 3:

Input: columnTitle = “ZY”

Output: 701

Example 4:

Input: columnTitle = “FXSHRXW”

Output: 2147483647

Constraints:
- 1 <= columnTitle.length <= 7
- columnTitle consists only of uppercase English letters.
- columnTitle is in the range ["A", "FXSHRXW"].

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  int titleToNumber(String s)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- Solution
```
public Solution()
```

Method Detail

titleToNumber

public int titleToNumber(String s)