#include <stdio.h>

int main(void) {
    double h = 0;
    double r1 = 0;
    double r2 = 0;
    const double pi = 3.1415;

    scanf("%lf %lf %lf", &h, &r1, &r2);

    double V = pi * h * (r1*r1 - r2*r2);
    double S = 0;
    double S1 = 0;

    printf("V = %lf\n", V);
    printf("S = %lf\n", S);
    printf("S1 = %lf\n", S1);
    return 0;
}