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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. const double eps = 0.001;
  4. int main () {
  5. double a = 1; 
  6. double b = 4;
  7. double c;
  8. int N = 4;
  9. double y1, y2;
  10. double F[N];
  11. for (int i = 2; i <= N; i++)
  12. {
  13. 	F[0] = 1;
  14. 	F[1] = 1;
  15. 	F[i] = F[i-2] + F[i-1];
  16. }
  17. double x1;
  18. double x2;
  19. double s1 = 0;
  20. int count = 0;	
  21. x1 = a + (b - a) * (F[N-2]/F[N]);
  22. x2 = a + (b - a) * (F[N-1]/F[N]);
  23. y1 = (x1-1)/(x1+1);
  24. y2 = (x2-1)/(x2+1);
  25. do {
  26. 	if (y1 < y2) {
  27. 		s1 = b;
  28. 		b = x2;
  29. 		y2 = y1;
  30. 		x2 = x1;
  31. 		x1 = a + (b - x2);
  32. 		y1 = (x1-1)/(x1+1);}
  33. 	else {
  34. 		s1 = a;
  35. 		a = x1;
  36. 		x1 = x2;
  37. 		x2 = b - (x1 - a); 
  38. 		y1 = y2;
  39. 		y2 = (x2-1)/(x2+1);}
  40. 		count++;
  41. 	 c = abs(x1-x2);
  42. }
  43. 	while (c > eps);
  44. 	cout << (x1 + x2)/ 2 << endl;
  45. 	return 0;
  46. }
  47.  
Success #stdin #stdout 0s 4264KB
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1.6
https://ideone.com/3gAXME
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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