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
思路
与上一个题目思路相反即可完成。
public int titleToNumber(String s) {
if(s==null){
return 0;
}
int len=s.length();
int res=0;
for(int i=0;i<len;i++){
int temp=s.charAt(i)-'A'+1;
res=res*26+temp;
}
return res;
}