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  1. #include <algorithm>
  2. #include <string>
  3. #include <vector>
  4.  
  5. template<typename I>
  6. void MergeSort(I first, I last) {
  7. 	if (last - first > 1) {
  8. 		I mid = first + (last - first) / 2;
  9. 		MergeSort(first, mid);
  10. 		MergeSort(mid, last);
  11. 		std::inplace_merge(first, mid, last);
  12. 	}
  13. }
  14.  
  15. int main() {
  16. 	for (int method = 2; method < 3; ++method) {
  17. 		std::vector<std::string> a(1000000);
  18. 		unsigned first = 0;
  19. 		unsigned last = a.size();
  20. 		for (unsigned i = 0; i < 100; ++i) {
  21. 			const std::string s = std::string()
  22. 					+ (char)('a' + i / 25)
  23. 					+ (char)('a' + i % 25);
  24. 			for (unsigned j = 0; j < i + 2; ++j) {
  25. 				a[first++] = s;
  26. 			}
  27. 			a[--last] = s;
  28. 		}
  29. 		for (unsigned pos = first; pos < last; ++pos) {
  30. 			a[pos] = std::string() + "z"
  31. 					+ (char)('a' + pos % 23);
  32. 		}
  33. 		switch (method) {
  34. 			case 0:
  35. 				std::sort(a.begin(), a.end());
  36. 				break;
  37. 			case 1:
  38. 				std::partial_sort(a.begin(), a.end(), a.end());
  39. 				break;
  40. 			case 2:
  41. 				std::stable_sort(a.begin(), a.end());
  42. 				break;
  43. 			case 3:
  44. 				MergeSort(a.begin(), a.end());
  45. 				break;
  46. 		}
  47. 	}
  48. 	return 0;
  49. }
  50.  
Success #stdin #stdout 1.25s 26672KB
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https://ideone.com/QV0b47
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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