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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	vector<int> arr = {1, 2, 3, 3, 3, 2, 3, 42, 1, 1}, tmp;
  8. 	for( int x : arr ){
  9. 		if(
  10. 			count_if(
  11. 				arr.begin(), arr.end(),
  12. 				[&x](int y){return x==y;}
  13. 			) <= 2
  14. 		  ) tmp.push_back(x) ;
  15. 	}
  16. 	arr = tmp;
  17. 	for( int x : arr ) {
  18. 		cout << x << endl;	
  19. 	}
  20. 	cout << arr.size();
  21.  
  22.  
  23. 	// your code goes here
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 3276KB
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stdin
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Standard input is empty
stdout
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2
2
42
3
https://ideone.com/tVOTGb
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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