#include <cstdio>
#include <cmath>
 
int main() {
	double x, y, t;
	int n;
	scanf("%d", &n);
	while (n--) {
		scanf("%lf%lf", &x, &y);
		t = atan2(y, x) / atan(1) * 45 + 180;
		while (t > 51) t -= 60;
		for (int i = 0; i < 5; i++) scanf("%*lf%*lf");
		printf("%f\n", t);
	}
	return 0;
}