#include <iostream>
#include <algorithm>
#include <vector>
#include <math>

using namespace std;

class vect3
{
private:
        double x, y, z;
public:
        vect3(double x, double y, double z) : x(x), y(y), z(z) {}
        double length() const {
                return x*x + y*y + z*z;
        }
        bool operator<(const vect3 &v) const {
                return length() == v.length();
        }
};

int main()
{
        vector<vect3> v;
        double d;
        int i;

        for(d=0,i=0;i<100;d=2*3.1416*(++i)/100) {
                v.push_back(vect3(2*cos(d),3*sin(d), d));
        }

        sort(v.begin(), v.end());
        while(next_permutation(v.begin(), v.end())) {
                //plot vectors in order
        }
        return 0;
}