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  1. #include <iostream>
  2. #include <random>
  3. #include <cstdint>
  4. #include <limits>
  5.  
  6. int AboutX(std::int32_t X, std::int32_t A){
  7. 	if (A > X)return 1;
  8. 	if (A < X) return -1;
  9. 	return 0;
  10. }
  11.  
  12. std::uint32_t BinarySearch(std::int32_t X, std::int32_t Add, int Judge){
  13. 	int F = 1;
  14. 	if (Add < 0) F *= -1;
  15. 	if (Add == 0) Add = 1*F;
  16. 	if (Judge == F) return X + Add;
  17. 	if (Judge == -F) return X - Add;
  18. 	return X;
  19. }
  20.  
  21. std::pair<std::int32_t,int> Process(int A){
  22. 	std::int32_t X = 0;
  23. 	std::int32_t Add = 0;
  24. 	int i = 0;
  25. 	int Judge = 0;
  26. 	do{
  27. 		if (i == 1){
  28. 			if (Judge > 0){
  29. 				Add = std::numeric_limits<std::int32_t>::max();
  30. 			}
  31. 			else{
  32. 				Add = std::numeric_limits<std::int32_t>::min();
  33. 			}
  34. 		}
  35. 		Add /= 2;
  36. 		X = BinarySearch(X, Add, Judge);
  37. 		Judge = AboutX(X, A);
  38. 		i++;
  39. 	} while (Judge != 0);
  40.  
  41. 	return std::make_pair(X,i);
  42. }
  43.  
  44. int main(){
  45. 	std::random_device rd;
  46. 	std::mt19937 mt(rd());
  47. 	//std::uniform_int_distribution<std::int32_t> uid(std::numeric_limits<std::int32_t>::min(),std::numeric_limits<std::int32_t>::max());
  48. 	std::uniform_real_distribution<> urd;
  49. 	std::int32_t A1 = (std::int32_t)(std::numeric_limits<std::int32_t>::max()*urd(mt));
  50. 	auto X1 = Process(A1);
  51. 	std::int32_t A2 = (std::int32_t)(std::numeric_limits<std::int32_t>::min()*urd(mt));
  52. 	auto X2 = Process(A2);
  53.  
  54. 	std::cout << "X=>" << X1.first << ',' << "Answer=>" << A1 << ' ' << std::endl << "Search for "<<X1.second<<" Count!" << std::endl<< "this is " << ((A1 == X1.first) ? "Valid" : "Invalid") << std::endl;
  55. 	std::cout << "X=>" << X2.first << ',' << "Answer=>" << A2 << ' ' << std::endl << "Search for "<<X2.second<<" Count!" << std::endl<< "this is " << ((A2 == X2.first) ? "Valid" : "Invalid") << std::endl;
  56.  
  57. 	return 0;
  58. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin
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Standard input is empty
stdout
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X=>1382432118,Answer=>1382432118 
Search for 31 Count!
this is Valid
X=>-1569586155,Answer=>-1569586155 
Search for 32 Count!
this is Valid
https://ideone.com/10zVme
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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