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  1. #include <cstdio>
  2. #include <cmath>
  3. double r1, r2, r, ans;
  4. int main() {
  5. 	scanf("%lf%lf", &r1, &r2);
  6. 	r = r1 < r2 ? r1 : r2;
  7. 	double delta = (double) r / 50000000;
  8. 	for(double base = delta; base <= r; base += delta) {
  9. 		ans += sqrt(r1 * r1 - base * base) * sqrt(r2 * r2 - base * base);
  10. 	}
  11. 	printf("%.8lf\n", ans * 8 * delta + r1 * r2 * delta * 4);
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 1.87s 3348KB
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100 100
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5333333.33333501
https://ideone.com/FEjGDO
SGU 217. Two Cylinders
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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