inline void normalize std vector double double sum for int size sum su

inline void normalize(std::vector<double>& x)
{
	double sum = 0;
    for (int i = 0; i < x.size(); ++i)
    	sum += x[i] * x[i];
    sum = sqrt(sum);
    for (int i = 0; i < x.size(); ++i)
    	x[i] /= sum;
}