public class MathExpression {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        double n = sc.nextDouble();
        double m = sc.nextDouble();
        double p = sc.nextDouble();

        int b = (int) Math.round(m);
        double result;

        double k = 128.523123123 * p;

        result = (Math.pow(n, 2) + (1 / m / p) + 1337) / (n - k) + Math.sin(b % 180);

        System.out.printf("%.6f", result);

    }
}