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

int main(void) {
    int n, i, j;

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

    for (i = 0; i < n; i++) {
        double theta1 = 2 * 3.1416 *  i / n;
        for (j = i + 1; j < n; j++) {
            double theta2 = 2 * 3.1416 *  j / n;
            printf("%.3f %.3f %.3f %.3f\n",
                   100 * cos(theta1), 100 * sin(theta1),
                   100 * cos(theta2), 100 * sin(theta2));
        }
    }

    return 0;
}