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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Dot
  6. {
  7. 	public double x, y;
  8.  
  9. 	public Dot() {}
  10.  
  11. 	public Dot(double x, double y)
  12. 	{
  13. 		this.x = x;
  14. 		this.y = y;
  15. 	}
  16. }
  17.  
  18. public class Main
  19. {
  20. 	public static double euclidianDistanceToZero(Dot a)
  21. 	{
  22. 		return Math.sqrt(a.x*a.x+a.y*a.y);
  23. 	}
  24.  
  25. 	public static void main (String[] args) throws java.lang.Exception
  26. 	{
  27. 		Scanner in = new Scanner(System.in);
  28. 		PrintWriter out = new PrintWriter(System.out);
  29.  
  30. 		int n_dot = in.nextInt();
  31. 		int n_circ = in.nextInt();
  32.  
  33. 		Vector <Dot> dots = new Vector<Dot>();
  34.  
  35. 		for(int i = 0; i < n_dot; ++i)
  36. 		{
  37. 			Dot a = new Dot(in.nextDouble(), in.nextDouble());
  38. 			if (a.y > 0)
  39. 				dots.addElement(a);
  40. 		}
  41.  
  42. 		double rads[] = new double[n_circ];
  43. 		int amounts[] = new int[n_circ];
  44.  
  45. 		for(int i = 0; i < n_circ; ++i)
  46. 		{
  47. 			rads[i] = in.nextDouble();
  48. 			amounts[i] = 0;
  49. 		}
  50.  
  51. 		if (n_circ == 1)
  52. 		{
  53. 			for(int i = 0; i < dots.size(); ++i)
  54. 				if (euclidianDistanceToZero(dots.elementAt(i)) < rads[0])
  55. 					++amounts[0];
  56. 		}
  57. 		else
  58. 			for(int i = 0; i < dots.size(); ++i)
  59. 			{
  60. 				int j = n_circ;
  61. 				double r = euclidianDistanceToZero(dots.elementAt(i));
  62.  
  63. 				if (r < rads[n_circ-1]) // if dot belongs to one of the semicircles
  64. 				{
  65. 					if (r < rads[0]) // if dot belongs to the first semicircle
  66. 						j = 0;
  67. 					else if (rads[n_circ-2] <= r) // if dot belongs to the last semicircle
  68. 						j = n_circ-1;
  69. 					else // binary search of the smallest semicircle, which includes dot
  70. 					{
  71. 						int prev_l = 0, prev_r = n_circ, k;
  72.  
  73. 						while(j == n_circ)
  74. 						{
  75. 							k = (prev_l+prev_r)/2;
  76.  
  77. 							if (rads[k-1] <= r && r < rads[k])
  78. 								j = k;
  79. 							else if (r >= rads[k])
  80. 								prev_l = (prev_l+k)/2;
  81. 							else //if (r < rads[k-1])
  82. 								prev_r = (prev_r+k)/2;
  83. 						}
  84. 					}
  85.  
  86. 					++amounts[j]; //increasing amount of dots, which belong to [j, n_circ-1] circles.
  87. 				}
  88. 			}
  89.  
  90. 		for(int accumulated_amount = 0, i = 0; i < n_circ; ++i)
  91. 		{
  92. 			accumulated_amount += amounts[i];
  93. 			amounts[i] = accumulated_amount;
  94. 		}
  95.  
  96. 		for(int i = 0; i < n_circ; ++i)
  97. 			out.println(String.valueOf(amounts[i]));
  98. 		out.flush();
  99. 	}
  100. }
Success #stdin #stdout 0.07s 842752KB
comments (?)
stdin
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20 11
14 4
5 -4
4 90
2 4.91
8 9.0
8.3 4.111 
20 49.0
0 301.419
8.01 34.5
2.1 -49.1
0.01 0.03
56 1.91
4.04918 34.49294
-1.85892 5.01674
51 214
14.94 44.09
41.4 -154
-581.49 495
14.39 -81.682
77 194.4
0.3
20.82
50.9
51
65.845
90.37
109.58
170.83
217
301.58901
314
stdout
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https://ideone.com/NpPDNw
A301
language:
Java (12.0.1)
created:
6 years ago
visibility:
secret

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