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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. #include <chrono>
  5.  
  6. using namespace std;
  7.  
  8. template <class F>
  9. chrono::milliseconds take_time(F&& f)
  10. {
  11. 	auto const begin = chrono::system_clock::now();
  12. 	f();
  13. 	auto const end = chrono::system_clock::now();
  14. 	return chrono::duration_cast<chrono::milliseconds>( end - begin );
  15. }
  16.  
  17. int main()
  18. {
  19. 	vector< vector<int> > arr {
  20. 		{1,5,3,4},
  21. 		{0,4,1,0},
  22. 		{7,2,3,1}
  23. 	};
  24. 	auto const time = take_time([&] {
  25. 		vector<int> tmp;
  26.  
  27. 		for (auto& r : arr)
  28. 			copy( r.begin(), r.end(), back_inserter( tmp ) );
  29.  
  30. 		sort( tmp.begin(), tmp.end() );
  31.  
  32. 		for (unsigned r=0; r<arr.size(); ++r) {
  33. 			for (unsigned c=0; c<arr[r].size(); ++c) {
  34. 				const unsigned i= r * arr[r].size() + c;
  35. 				arr[r][c] = tmp[i];
  36. 			}
  37. 		}
  38. 	});
  39. 	/* results */
  40. 	for (auto& row : arr)
  41. 	{
  42. 		for (auto& col : row)
  43. 			cout << col << ", ";
  44. 		cout << '\n';
  45. 	}
  46. 	cout << time.count() << " ms." << endl;
  47.  
  48. 	return 0;
  49. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
Standard input is empty
stdout 
0, 0, 1, 1, 
1, 2, 3, 3, 
4, 4, 5, 7, 
0 ms.
https://ideone.com/cF31w0
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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