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

int main(void) {
	double v, y, t;
  int n;

	while (cin >> v) {
    t = v / 9.8;
    y = 4.9 * t * t;
    n = (y + 5) / 5;
    cout << y << endl;
    cout << n << endl;
	}
}