Java | Leetcode Java题解之第171题Excel表列序号

题目：

题解：

class Solution {public int titleToNumber(String columnTitle) {int number = 0;int multiple = 1;for (int i = columnTitle.length() - 1; i >= 0; i--) {int k = columnTitle.charAt(i) - 'A' + 1;number += k * multiple;multiple *= 26;}return number;}
}