【LeetCode】171 Excel Sheet Column Number
2015-12-01 13:36
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Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
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
public class Solution {
public int titleToNumber(String s) {
String source = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
int flag = 0;
int sum = 0;
for (int i = 0; i < s.length(); i++) {
flag = (1+source.indexOf(s.charAt(i)));
sum += flag*Math.pow(26, s.length() - i-1);
}
return sum;
}
}
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