#include <iostream>
//#include <iomanip>
//#include <cstdlib>
#include <ctime>
#include <cmath>
#include <fstream>


using namespace std;

#define PI 	M_PI
#define PI2 PI*PI

inline double unif_rand_x() {
	return 4*(rand()+0.5)/(RAND_MAX+1.0)-2;
}

inline double unif_rand_y() {
	return (1.1/PI)*(rand()+0.5)/(RAND_MAX+1.0);
}

double wigner() {
	double x=unif_rand_x(), y=unif_rand_y();
	while (4<4*PI2*y*y+x*x) {
		x=unif_rand_x();
		y=unif_rand_y();
	}
	return x;
}

int main() {
	int n;
	cout<<"n ?"<<endl;
	cin>>n;
	srand(time(0));
	rand();
	for(int i=0;i<n;++i) {
	cout<<wigner()<<endl;}
	return 0;
}