public class Logistic {
    public static void main(String[] args) {
	double y = 2000;
	double pop = 6;
	for (int i = 1; i <= 30; i++) {
	    System.out.println(y + " " + pop);
	    y += 10;
	    pop += (-.7441261047+.5547590777*pop-.5140559217e-1*pop*pop);
	}
	System.out.println(y + " " + pop);

    }
}