[LeetCode #171] Excel Sheet Column Number

Excel Sheet Column Number

Given a 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 
public class Solution {
    public int titleToNumber(String s) {
        
        int result = 0;
        for (int i = 0; i < s.length(); i++) {
            result = result * 26 + (s.charAt(i) - 'A' + 1);
        }
        return result;

	
    }
}
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