Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:算法
A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28
给定一个Excel表的行标题,返回它对应的行号。app
本质就是将一个26进制的数,转换成10进制的数。spa
算法实现类.net
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; } }