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  1. #include <iostream>
  2. #include <map>
  3. using namespace std;
  4.  
  5. int main() 
  6. {
  7. 	map<int, int>hash;
  8. 	int n, m;
  9.  
  10. 	cin>>n;			//Given range 1 to n
  11. 	cin>>m;			// size of array
  12.  
  13. 	for(int i=1;i<=m;i++)
  14. 	{
  15. 		int x;
  16. 		cin>>x;
  17. 		hash[x] = 1;
  18. 	}
  19.  
  20. 	for(int i=1;i<=n;i++)
  21. 	{
  22. 		if(hash[i] == 0)
  23. 		cout<<i<<endl;
  24. 	}
  25. 	return 0;
  26. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/kz7gNH
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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