#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;
}