#include <stdio.h>
#include <math.h >
#define PI 3.14

void main()
{   float d,h,s;
	printf("Enter distance : ");
	scanf("%f",&d);
	printf("Enter height : ");
	scanf("%f",&h);
	s=(2*PI*d*d/4)+(2*PI*d/2*h);
	printf("Surface = %f",s);

}