Excel Sheet Column Title
Given a positive integer, return its corresponding column title as appear in an Excel sheet.
For example:
1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB
Solution
根据题意进行转化即可
Complexity
时间复杂度 O(n),空间复杂度 O(1)
Code
public class Solution {
public String convertToTitle(int n) {
StringBuffer sb = new StringBuffer();
while (n > 0) {
sb.insert(0,(char)((n - 1)%26 + 'A'));
n = (n - 1) / 26;
}
return sb.toString();
}
}