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


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

  while (cin >> d) {
    v.push_back(d);
  }
  sort(v.begin(), v.end());
  
  for (i = 0; i < v.size(); i++) {
    cout << v[i] << " " << ((double) i + 1) / ((double) v.size()) << endl;
  }
}