168. Excel Sheet Column Title

最新推荐文章于 2020-08-05 20:55:23 发布

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最新推荐文章于 2020-08-05 20:55:23 发布

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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”

string convertToTitle(int n) {
        string res = "";
        while(n > 0){
            int r = --n%26;
            res.insert(0, 1, (char)('A'+r));
            n /=26;
        }
        return res;
    }