int size = grades.size();
    vector<int> newgrades;
    
    for(int i=0; i<size; i++){
        if(grades[i]%5 > 2 && grades[i] > 37){
            int adder = 5 - (grades[i]%5);
            newgrades.push_back(grades[i] + adder);
        }
        else{
            newgrades.push_back(grades[i]);
        }   
    }
    return newgrades;
}