原题链接https://leetcode.com/problems/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
...
Example 1:
Input: 1
Output: "A"
Example 2:
Input: 28
Output: "AB"
Example 3:
Input: 701
Output: "ZY"
class Solution:
def convertToTitle(self, n: int) -> str:
num_to_letter = "0ABCDEFGHIJKLMNOPQRSTUVWXYZ"
if not isinstance(n, int):
return -1
res =""
while n:
n, left = divmod(n-1, 26)
res = num_to_letter[left+1] + res
return res
