public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int t = scanner.nextInt();
scanner.nextLine();
assert 1 <= t && t <= 10 : "out of range, t: " + t;
for (int it = 1; it <= t; it++) {
Bravo o = Bravo.load(scanner);
System.out.printf("Case #%d: %.7f\n", it, o.solve());
}
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int nt = scanner.nextInt();
scanner.nextLine();
assert 1 <= nt && nt <= 100 : "out of range, nt: " + nt;
for (int it = 1; it <= nt; it++) {
Bravo o = Bravo.load(scanner);
System.out.printf("Case #%d: %s\n", it, numors(o.solve(it), "IMPOSSIBLE"));
}
}
