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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int x1, y1, x2, y2, x3, y3;
  6. 	cin>>x1>>y1>>x2>>y2>>x3>>y3;
  7. 	int S=x1*(y2-y3)+x2*(y3-y1)+x3*(y1-y2);
  8. 	if (S==0)
  9. 		cout<<"YES";
  10. 	else
  11. 		cout<<"NO";
  12. 	return 0;
  13. }
Success #stdin #stdout 0.01s 5292KB
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YES
https://ideone.com/MEi72C
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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