1678. Goal Parser Interpretation

class Solution {
public:
    string interpret(string command) {
       string ans;

       for(int i=0; i<command.length(); i++)
       {
           if(command[i]=='(' && command[i+1]==')')
           {
               ans+='o';
           }
            else
            {
                if(command[i] != '(' && command[i]!=')')
                    ans+=command[i];
            }
       } 
       return ans;
    }
};