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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int arr[]= {1, -2, 1, 0, 5};
  6. 	int n=sizeof(arr)/sizeof(arr[0]);
  7. 	int x=0;
  8. 	bool flag=false;
  9. 	unordered_set<int> mp;
  10. 	for(int j=0;j<n;j++)
  11. 	{
  12. 		int diff=x-arr[j];
  13. 		if(mp.find(diff)!=mp.end()){
  14. 			flag=true;
  15. 			cout<<"true";
  16. 			break;
  17. 		}
  18. 		mp.insert(arr[j]);
  19. 	}
  20. 	if(flag==false)
  21. 		cout<<"false";
  22. 	return 0;
  23. }
  24.  
Success #stdin #stdout 0.01s 5324KB
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stdin
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Standard input is empty
stdout
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false
https://ideone.com/RJXpK6
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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