InterviewBit Problems   Excel Column Number : Solved

About the Excel Column Number : Solved category (1)
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TC-O(26*n),SC-O(26) ,C++ (1)
Python solution 457 (1)
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Simple O(n) time complexity and O(1) space complexity (1)
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Very easy and short code with no overflow (1)
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Scala solution. One LOC (1)
Using Math.pow() (1)
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Fast simple Golang solution (1)
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Wrong expected returned value in Excel Column Number (1)
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Simple JAVA solution with O(1) space complexity (3)
In case you need see the solution [C++] (2)
Easy 2-line solution (1)
Easy c++ solution excel col num! (2)
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3 line Java Solution without pow function (3)
Python efficient Solution (1)
Simple and easy to understand (1)
Could somebody please explain how this formula 'result = result * 26 + (s[i] - 'A (3)
Python concise and elegant solution (1)
Easiest Code ever [JAVA] (1)