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  1. #include <iostream>
  2. #include <vector>
  3. #include <random>
  4. #include <algorithm>
  5.  
  6. std::vector<std::size_t> MakeRandom(std::size_t N){
  7. 	std::vector<std::size_t> vec(N);
  8. 	std::size_t i = 0;
  9.  
  10. 	for (auto& o : vec) o = i++;
  11.  
  12. 	std::random_device rd;
  13. 	std::mt19937 mt(rd());
  14.  
  15. 	std::shuffle(vec.begin(), vec.end(), mt);
  16.  
  17. 	return vec;
  18.  
  19. }
  20.  
  21. std::vector<std::size_t> MakeHoge(std::size_t N, std::size_t Drop = 2, bool IsShowArray = false){
  22.  
  23. 	auto vec = MakeRandom(N);
  24. 	std::vector<std::size_t> ret;
  25. 	int C = 0;
  26. 	bool IsFind = false;
  27. 	std::size_t j = 0;
  28.  
  29. 	for (std::size_t i = 0; i < Drop; i++){
  30. 		vec.pop_back();
  31. 	}
  32. 	if (IsShowArray == true){
  33. 		for (std::size_t i = 0; i < vec.size(); i++){
  34. 			std::cout << vec[i] << ',';
  35. 		}
  36. 		std::cout << std::endl;
  37. 	}
  38. 	for (std::size_t i = 0; i < N; i++)
  39. 	{
  40. 		IsFind = true;
  41. 		for (std::size_t j = 0; j < vec.size(); j++){
  42.  
  43. 			if (vec[j] == i){
  44. 				IsFind = false;
  45. 				break;
  46. 			}
  47. 		}	
  48. 		if (IsFind == true){
  49. 			ret.push_back(i);
  50. 			if (ret.size() == Drop) break;
  51. 		}
  52. 	}
  53.  
  54.  
  55. 	return ret;
  56. }
  57. int main(){
  58. 	auto R = MakeHoge(16, 2, true);
  59.  
  60. 	std::cout << "I find Number of (";
  61. 	for (auto& o : R) std::cout << o << ',';
  62. 	std::cout << ")";
  63.  
  64. 	return  0;
  65. }
Success #stdin #stdout 0s 3432KB
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stdin
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Standard input is empty
stdout
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10,9,3,0,2,5,12,4,11,6,15,8,1,13,
I find Number of (7,14,)
https://ideone.com/7YIxZx
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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