Excel Sheet Column Number ( LeetCode ) Problem Solution.

Excel Sheet Column Number ( LeetCode ) Problem Solution.

For example:

    A -> 1
    B -> 2
    C -> 3
    ...
    Z -> 26
    AA -> 27
    AB -> 28 
    ...

Example 1:

Input: "A"
Output: 1

Example 2:

Input: "AB"
Output: 28

Example 3:

Input: "ZY"
Output: 701

Solution :-

class Solution:
    def titleToNumber(self, s: str) -> int:  
        ans=0
        for i in range(0,len(s)):
            temp=ord(s[i])-64
            ans+=temp*26**(len(s)-1-i)
        return ans

Runtime: 28 ms, faster than 80.96% of Python3 online submissions for Excel Sheet Column Number.

Memory Usage: 12 MB, less than 8.06% of Python3 online submissions for Excel Sheet Column Number.