Mars Exploration

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    int count=0;
        string d;
        for(int i=0;i<s.length();i=i+3)
        {
            d+="SOS";
        }
        for(int i=0;i<d.length();i++)
        {
            if(d.at(i)!=s.at(i))
            {
                count++;
            }
        }
        return count;
    
    }