譬如这种题目
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
一看就觉得是26进制
但是就是不相信第一感,而要仔细琢磨一下,演算一下,怕出错
这是怎么回事?是不是脑力不够,没有天赋?