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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	vector<int> vec = {1, 2, 3, 4, 1, 2, 3, 4, 1, 1, 2, 7, 5, 5};
  8. 	sort(vec.begin(), vec.end());
  9. 	auto it = vec.begin(), end = vec.end();
  10. 	while(it != end) {
  11. 		auto tmp_it = find_if_not(it, end, [&](const int value) { return value == *it; });
  12. 		if(distance(it, tmp_it) == 2) cout << *it << "\n";
  13. 		it = tmp_it;
  14. 	}
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 3428KB
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https://ideone.com/AF4Fx8
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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