168.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2020/4/21 9:30
# @Author  : Fhh
# @File    : 168.py
# Good good study,day day up!
"""给定一个正整数，返回它在 Excel 表中相对应的列名称。
例如，
    1 -> A
    2 -> B
    3 -> C
    ...
    26 -> Z
    27 -> AA
    28 -> AB
    ...
示例 1:

输入: 1
输出: "A"
示例 2:

输入: 28
输出: "AB"
示例 3:

输入: 701
输出: "ZY"
"""


class Solution:
    def convertToTitle(self, n: int) -> str:
        res = ''
        while n:
            n -= 1
            res = chr(n % 26 + 65) + res
            n //= 26
        return res


s = Solution()
import time
a=time.time()
for i in range(1000):
    print("{}={}".format(i,s.convertToTitle(i)))
b=time.time()
print(b-a)