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+%22%22%22%0A171 Excel Sheet Column Number%0Ahttps://leetcode.com/problems/excel-sheet-column-number/description/%0ARelated to question Excel Sheet Column Title%0A%0AGiven a column title as appear in an Excel sheet, return its corresponding column number.%0A%0AFor example:%0A%0A    A -%3E 1%0A    B -%3E 2%0A    C -%3E 3%0A    ...%0A    Z -%3E 26%0A    AA -%3E 27%0A    AB -%3E 28 %0A%22%22%22%0Aclass Solution(object):%0A    def titleToNumber(self, s):%0A        %22%22%22%0A        :type s: str%0A        :rtype: int%0A        %22%22%22%0A        column_num = 0%0A        for i,letter in enumerate(s):%0A            column_num = 26 * column_num + ord(letter) - 64%0A        return column_num%0A            %0A

Create 171_excel_sheet_column_number.py