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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin>>n;
  7. 	int a = 0, b = 0, c = 0;
  8. 	for(int i =0;i<n;i++){
  9. 		int x, y, z;
  10. 		cin>>x>>y>>z;
  11. 		a+=x;
  12. 		b+=y;
  13. 		c+=z;
  14. 	}
  15. 	if((a==0)&&(b==0)&&(c==0)) cout<<"YES"<<endl;
  16. 	else cout<<"NO"<<endl;
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin
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3
3 -1 7
-5 2 -4
2 -1 -3
stdout
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YES
https://ideone.com/ZW5A9x
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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