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  1. #include <iostream>
  2. #include <vector>
  3. #include <cstdint>
  4. #include <algorithm>
  5. #include <map>
  6. //MITライセンス　です。
  7.  
  8. typedef std::vector<std::int64_t> DType;
  9.  
  10. template<class Container>
  11.  typename Container::value_type MakeHoge3(const Container& D) {
  12. 	std::map < typename Container::value_type, std::uintmax_t> M;
  13.  
  14. 	for (auto& o : D) {
  15. 		M[o]++;
  16. 	}
  17. 	for (auto& o : M) {
  18. 		if (o.second == 1) {
  19. 			return o.first;
  20. 		}
  21. 	}
  22. 	return { -1 };
  23. }
  24. /** /
  25.  
  26. typedef std::map<std::int64_t, std::uint64_t> MType;
  27.  
  28. std::int64_t MakeHoge2(const DType& D) {
  29. 	MType M;
  30.  
  31. 	for (auto& o : D) {
  32. 		M[o]++;
  33. 	}
  34. 	for (auto& o : M) {
  35. 		if (o.second == 1) {
  36. 			return o.first;
  37. 		}
  38. 	}
  39. 	return -1;
  40.  
  41. }
  42. /**/
  43.  
  44. /** /
  45. DType::value_type MakeHoge(DType D) {
  46.  
  47. 	std::sort(D.begin(), D.end());
  48. 	std::size_t i = 0;
  49. 		for (i = 1; i < D.size() - 1; i++) {
  50. 		if (D[i - 1] != D[i]) {
  51. 			if (D[i] == D[i + 1])continue;
  52.  
  53. 			return D[i];
  54. 		}
  55. 	}
  56. 	if (D[i] != D[i - 1])return D[i];
  57. 	return -1;
  58. }
  59. /**/
  60. int main() {
  61. 	DType D = { 1,1,1,1,2,2,2,3,3,4 };
  62. 	std::cout << MakeHoge3(D) << std::endl;
  63. 	D = DType{ 1,2,3,4,5,5,4,3,2,1 };
  64. 	std::cout << MakeHoge3(D) << std::endl;
  65. 	D = DType{ 3,1,4,1,5,9,2,6,5,3,5 };
  66. 	std::cout << MakeHoge3(D) << std::endl;
  67. 	return 0;
  68. }
  69.  
  70.  
Success #stdin #stdout 0s 4480KB
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https://ideone.com/Cu9Dix
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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