fork download
copy 
  1. #include <iostream>
  2. #include <sstream>
  3. #include <set>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	string temp;
  8. 	getline(cin, temp);
  9. 	stringstream in(temp);
  10. 	int val;
  11. 	set<int> res;
  12. 	while (true) {
  13. 		in >> val;
  14. 		if (in) 
  15. 			res.insert(val);
  16. 		else 
  17. 			break;
  18. 	}
  19. 	cout << 4 - (int)res.size() << endl;
  20. 	return 0;
  21. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
copy 
1 2 3 4 5
stdout
copy 
-1
https://ideone.com/3ltYxs
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!