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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. double abs(double argument) {
  5. 	return argument >= 0 ? argument : -argument;
  6. }
  7.  
  8. int ceil(double argument) {
  9. 	int result = (int) argument;
  10. 	if((double) result != argument && argument > 0) {
  11. 		result++;
  12. 	} else if((double) result == argument && argument < 0) {
  13. 		result++;
  14. 	}
  15. 	return result;
  16. }
  17.  
  18. int determineOrderOfPolynomial(double argument, double accuracy) {
  19. 	int order = 1;
  20. 	double a = 2 * argument;
  21. 	while(abs(a) >= accuracy) {
  22. 		order++;
  23. 		a *= 2 * argument / (order + 1);
  24. 	}
  25. 	return order;
  26. }
  27.  
  28. double function(double argument, double accuracy) {
  29. 	int order = determineOrderOfPolynomial(argument, accuracy);
  30. 	double summand = 2;
  31. 	double sum = summand;
  32. 	for(int k = 2; k <= ceil(order / 2.0); k++) {
  33. 		summand *= -4 * argument * argument / ((2 * k - 2) * (2 * k - 1));
  34. 		sum += summand;
  35. 	}
  36. 	return sum;
  37. }
  38.  
  39. int main() {
  40. 	double argument, accuracy;
  41. 	cin >> argument >> accuracy;
  42. 	if(argument == 0) {
  43. 		cout << "empty set";
  44. 	} else {
  45. 		cout << function(argument, accuracy);
  46. 	}
  47. 	cout << endl;
  48. 	return 0;
  49. }
Time limit exceeded #stdin #stdout 5s 3460KB
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https://ideone.com/rIrtfh
MLoop16
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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