LeetCode168. Excel Sheet Column Title

文章目录

• • 一、题目
  • 二、题解

    一、题目

    index.php/tags-41973.html" >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 public: string convertToTitle(int columnNumber) { string res; while (columnNumber 0) { int a0 = (columnNumber - 1) % 26 + 1; res += a0 - 1 + 'A'; columnNumber = (columnNumber - a0) / 26; } reverse(res.begin(), res.end()); return res; }};