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Question:
Related to question Excel Sheet Column Title
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
1、题型分类:
2、思路:
3、时间复杂度:
4、代码:
public int titleToNumber(String s) { int ret=0; for(int i=0;i<s.length();i++) { ret+=(s.charAt(i)-‘A‘+1)*Math.pow(26, s.length()-i-1); } return ret; }
5、优化:
6、扩展:
[LeetCode] Excel Sheet Column Number
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原文地址:http://www.cnblogs.com/maydow/p/4643854.html