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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
思路:
相当于26进制转10进制,要注意A从1开始而不是从0开始的边界条件。
解法:
public class Solution { public int titleToNumber(String s) { int sum = 0; int temp; for(int i = 0; i < s.length(); i++) { temp = s.charAt(i) - ‘A‘ + 1; sum = sum * 26 + temp; } return sum; } }
LeetCode 171 Excel Sheet Column Number
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原文地址:http://www.cnblogs.com/wood-python/p/5839258.html