Submission #75938494

Source Code Expand

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#include <stdio.h>
#include <math.h>
int main(void) {
  double pi = atan(1) * 4;
  int D;
  if (scanf("%d", &D) != 1) return 1;
  printf("%.30f\n", (D * 0.5) * (D * 0.5) * pi);
  return 0;
}
 
 
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#include <stdio.h>
#include <math.h>

int main(void) {
	double pi = atan(1) * 4;
	int D;
	if (scanf("%d", &D) != 1) return 1;
	printf("%.30f\n", (D * 0.5) * (D * 0.5) * pi);
	return 0;
}

Submission Info

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