#include <iostream>
#include <cmath>

using namespace std;

int main()
{
	    double x[20],y[20],CA[20];
	    double c0=5;
	    x[0] = 1.;
	    y[0] = c0/x[0]; 
	    cout << x[0] << " " << y[0] << endl;
	    for(int i=1; i < 20; i++){
		    if( i % 5  == 0 ){
                        //printf("%d は偶数です\n", i);
			x[i] = x [i-1];
			y[i] = c0/x[i];
			cout << x[i] << " " << y[i] << endl;
                    } else {
                        //printf("%d は奇数です\n", i);
			CA[i] = pow(x[i-1],-1.4)*y[i-1];
			x[i] = x[i-1] + 0.02;
			y[i] = CA[i]* pow(x[i],-1.4);
			cout << x[i] << " " << y[i] << endl;
                    }
	  //	        double freq=440.*pow(2.,doremi[i]/12.);
          //			    cout << doremi[i] << " " << freq << endl;
	    }
	    return 0;
}