#include<stdio.h>
#include<math.h>
typedef struct{
    int radius;
    int height;
}Cylinder;
void calculate_surface_area(Cylinder cylinder){
    if(cylinder.radius < 0 || cylinder.height < 0){
        printf("Invalid input\n");
    } else{
        double surface_area = 2 * M_PI * cylinder.radius*(cylinder.radius+cylinder.height);
        printf("Surface Area:%.2f\n",surface_area);
    }
}
int main()
{
    Cylinder cylinder;
    scanf("%d", &cylinder.radius);
    scanf("%d", &cylinder.height);
    calculate_surface_area(cylinder);
    
    return 0;
}