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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. using namespace std;
  5. double bez(double x)
  6. {
  7. 	if (x < 0)
  8. 	{
  9. 		return x*-1;
  10. 	}
  11. 	else
  12. 	{
  13. 		return x;
  14. 	}
  15. }
  16.  
  17. double Pole(double x, double y, double x1, double y1)
  18. {
  19. 	double p;
  20. 	p = ((x*y1) - (x1*y)) / 2;
  21. 	return bez(p);
  22. }
  23.  
  24.  
  25. int main()
  26. {
  27.  
  28. 	int ile, a, b, c, d;
  29. 	double pole, p2, x = -1;
  30. 	vector <double> wx;
  31. 	vector <double> wy;
  32.  
  33. 	cin >> ile;
  34. 	for (int i = 0; i < ile * 2; i++)
  35. 	{
  36. 		x += 2;
  37. 		cin >> a;
  38. 		cin >> b;
  39. 		cin >> c;
  40. 		cin >> d;
  41. 		wx.push_back(c - a);
  42. 		wy.push_back(d - b);
  43. 		cin >> c;
  44. 		cin >> d;
  45. 		wx.push_back(c - a);
  46. 		wy.push_back(d - b);
  47. 		pole = Pole(wx[x - 1], wy[x - 1], wx[x], wy[x]);
  48. 		while ((c != a) || (d != b))
  49. 		{
  50. 			x++;
  51. 			cin >> c;
  52. 			cin >> d;
  53.  
  54. 			wx.push_back(c - a);
  55. 			wy.push_back(d - b);
  56. 			if ((wy[x] / wx[x]) > (wy[x - 1] / wx[x - 1]) && wx[x] >= 0 || (wy[x] / wx[x]) < (wy[x - 1] / wx[x - 1]) && wx[x] < 0)
  57. 			{
  58. 				pole += Pole(wy[x], wx[x], wy[x - 1], wx[x - 1]);;
  59. 			}
  60. 			else
  61. 			{
  62. 				pole -= Pole(wy[x], wx[x], wy[x - 1], wx[x - 1]);
  63. 			}
  64.  
  65.  
  66. 		}
  67. 		pole = bez(pole);
  68. 		if (i % 2 == 0)
  69. 		{
  70. 			p2 = pole;
  71.  
  72. 		}
  73. 		else
  74. 		{
  75.  
  76. 			cout << (p2 * 10) + (pole - p2) * 6 << endl;
  77.  
  78. 		}
  79.  
  80. 	}
  81. 	return 0;
  82. }
Success #stdin #stdout 0s 16056KB
comments ()
stdin 
2
1 2 2 1 2 2 1 2
0 2 3 0 2 3 0 2

2 3 5 2 3 3 5 4 2 3
1 5 1 3 5 0 3 2 5 1 6 2 4 3 6 3 6 4 7 4 7 1 6 1 6 0 8 0 8 5 1 5
stdout 
23
139
https://ideone.com/sp23TP
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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