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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. vector<int> findDup(int a[], int len) {
  6. 	vector<int> ret;
  7. 	for (int i = 0; i<len; i++) {
  8. 		if(a[abs(a[i])] > 0) a[abs(a[i])] *= -1;
  9. 		else ret.push_back(abs(a[i]));
  10. 	}
  11. 	return ret;
  12. }
  13.  
  14. int main() {
  15. 	int a[] = {1,3,2,2,1};
  16. 	vector<int> vet;
  17. 	vet = findDup(a, sizeof(a)/sizeof(a[0]));
  18. 	for (int i:vet) cout<<i<<" ";
  19. 	// your code goes here
  20. 	return 0;
  21. }
Success #stdin #stdout 0s 3428KB
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https://ideone.com/HGXm5S
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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