#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

class Squares : vector<int> {
public:
  Squares(unsigned n) { for (unsigned k=0; k<n; k++) push_back(k*k); }

  // decreasing order; *** must be static ***
  static bool cmp( const int& x1, const int& x2) {
    return x1 > x2; }

  void rsort() { sort(begin(), end(), cmp); }

  ostream& print(ostream& out) const {
    for (unsigned k=0; k<size(); k++) out<< (*this)[k]<< endl;
    return out; }
};

int main() {
  Squares sq(10);
  sq.rsort();
  sq.print(cout);
}