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 ...
Example 1:
Input: 1 Output: "A"
Example 2:
Input: 28 Output: "AB"
Example 3:
Input: 701 Output: "ZY"
此题卡顿半天,上网参考代码,但看许多人解释这是二十六进制转化,思忖再三觉得不是。
另此处头插字符串很有创意。
class Solution {
public:
string convertToTitle(int n) {
string s="";
while(n!=0)
{
s=(char)((n-1)%26+'A')+s;
n=(n-1)/26;
}
return s;
}
};