import java.awt.*;
import java.lang.Double;
/* gcj --main=RK RK.java -o RK */
class RK {
public static void main (String args[]) {
    int i,m;
    double x,v,x_new, v_new, h,t,l1,l2,k1,k2,k3,l3;
    h=0.02;
    x=1.0;  /* initial data */
    v=0.0;  /* initial data */
    t=0.0;
    for(m=0;m<2000;m++){
    /* third order RK */
        k1=h*v; 
        l1=-2.0*h*x*x*x; 
        k2=h*(v+0.5*l1); 
        l2=-2.0*h*(x+0.5*k1)*(x+0.5*k1)*(x+0.5*k1); 
        k3=h*(v+l2); 
        l3=-2.0*h*(x+k2)*(x+k2)*(x+k2); 
        v=v+(l1+4.0*l2+l3)/6.0; 
        x=x+(k1+4.0*k2+k3)/6.0; 
	System.out.println(x + "\t" + v);
     }
   }
}