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  1. #include <iostream>
  2. #include <algorithm>
  3. using namespace std;
  4.  
  5. int main(){
  6. 	int n, a[100005];
  7. 	cin >>n;
  8. 	for (int i = 1; i <= n; i++){
  9. 		cin >> a[i];
  10. 	}
  11. 	sort(a+1, a+n+1);
  12. 	for (int i = n; i >= 3; i--){
  13. 		if (a[i-2]+a[i-1]>a[i]){
  14. 			cout << "YES";
  15. 			return 0;
  16. 		}
  17. 	}
  18. 	cout << "NO";
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 15512KB
comments (?)
stdin 
5
1 5 3 2 4
stdout 
YES
https://ideone.com/Md1LRP
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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