fork download 
  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. #include <map>
  5.  
  6. typedef std::map<std::string, std::vector<std::string>> MType;
  7.  
  8. int main() {
  9. 	MType M{{	"A",{"2019 / 07 / 05","2019 / 07 / 10","2019 / 07 / 15","2019 / 07 / 20"}},
  10. 			{	"B",{"2019 / 07 / 08","2019 / 07 / 10","2019 / 07 / 20"}},
  11. 			{	"C",{"2019 / 07 / 15","2019 / 07 / 20","2019 / 07 / 25"}},	
  12. 	};
  13.  
  14. 	MType D;
  15.  
  16. 	for (auto& oo : M) {
  17. 		for (auto& o : oo.second) {
  18. 			D[o].push_back( oo.first);
  19. 		}
  20. 	}
  21.  
  22. 	for (auto& oo : D) {
  23. 		if (oo.second.size() < 2)continue;
  24. 		std::cout << oo.first << ':';
  25. 		for (auto& o : oo.second) {
  26. 			std::cout << o << ' ';
  27. 		}
  28. 		std::cout << std::endl;
  29. 	}
  30.  
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
2019 / 07 / 10:A B 
2019 / 07 / 15:A C 
2019 / 07 / 20:A B C
https://ideone.com/wTvm0s
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!