#include <stdio.h>
#include <math.h>

int main(void) {
    int n, i;

    printf("nを入力して下さい: "); scanf("%d", &n);

    for(i = 0; i < n; i++) {
        double theta1 = 2 * M_PI *  i / n;
        double theta2 = 2 * M_PI *  (i+1) / n;
        printf("%.3f %.3f %.3f %.3f\n",
	       100 * cos(theta1), 100 * sin(theta1),
               100 * cos(theta2), 100 * sin(theta2));
    }

    return 0;
}