problem
171. Excel Sheet Column Number
sum( (s[i]-'A'+1)*pow(26, i) )
code
class Solution { public: int titleToNumber(string s) { int n=0; int ans = 0; while(n<s.size()) { ans = ans*26 + (s[n] - 'A' + 1); n++; } return ans; } };
problem
171. Excel Sheet Column Number
sum( (s[i]-'A'+1)*pow(26, i) )
code
class Solution { public: int titleToNumber(string s) { int n=0; int ans = 0; while(n<s.size()) { ans = ans*26 + (s[n] - 'A' + 1); n++; } return ans; } };