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  1. #include <iostream>
  2. #include <stdio.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n, x1, y1, x2, y2, x3, y3, cnt;
  7. 	scanf("%d", &n); 
  8. 	cnt=0;
  9. 	while(n--) {
  10. 		scanf("%d%d%d%d%d%d", &x1, &y1, &x2, &y2, &x3, &y3);
  11. 		if (((y2-y1)*(y3-y2))==-((x2-x1)*(x3-x2)))
  12. 			cnt++;
  13. 		else if (((y1-y2)*(y3-y1))==-((x1-x2)*(x3-x1)))
  14. 			cnt++;
  15. 		else if (((y3-y1)*(y2-y3))==-((x3-x1)*(x2-x3)))
  16. 			cnt++;
  17. 	}
  18. 	printf("%d", cnt);
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 3344KB
comments ()
stdin
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6
0 5 19 5 0 0
17 19 12 16 19 0
5 14 6 13 8 7
0 4 0 14 3 14
0 2 0 14 9 2
0 0 0 2 1 1
stdout
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4
https://ideone.com/y4pOmO
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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