C++ solution with comments!!


  • 0
    R
    class Solution {
    public:
        int titleToNumber(string s) {
            int col=0;     // Base case
            for (int i=0; s[i]!=0; i++){    //iterate over the string
                col = col*26 + s[i] - 'A' + 1;   //(s[i] -'A' + 1) will return the corresponding value of s[i] column 
            }
            return col;
        }
    };

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