#include <stdio.h>
#include <math.h>
#define PI M_PI

int main() {
    double r, h;
    
    scanf("%lf", &h);
    
    if (r < 0 || h < 0) {
        printf("Invalid input\n");
    } else {
        
        double surfaceArea = (2 * PI *r *h) + (PI * r *r);
        printf("Surface A")
    }
}