一個小小工程師的心情抒發天地

Given an integer columnNumber, return its corresponding column title as it appears in an Excel sheet.

For example:

A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28 
...

Example 1:

Input: columnNumber = 1
Output: "A"

Example 2:

Input: columnNumber = 28
Output: "AB"

Example 3:

Input: columnNumber = 701
Output: "ZY"

Constraints:

• 1 <= columnNumber <= 231 - 1

class Solution {
public:
    string convertToTitle(int columnNumber) 
    {
        string strTemp;
        while (columnNumber > 0)
        {
            char c = (char)((columnNumber % 26 == 0 ? 26 : columnNumber % 26) + 64);
            strTemp+=c;
            columnNumber = (columnNumber % 26 == 0 ? columnNumber / 26 - 1 : columnNumber / 26);
        }
        reverse(strTemp.begin(), strTemp.end());
        return strTemp;
    }
};

這兩天應該是有點小中暑, 腦袋有點不聽使喚的感覺, Q_Q