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  1. /* package whatever; // don"t place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7.  
  8.  
  9. /**
  10.  * An array with special operations.  
  11.  * @param <T> the type of elements in this array
  12.  *
  13.  * @author  Igor Mazurok
  14.  */
  15.  
  16. interface SegmentedArray<T> {
  17.    /**
  18. 	* <p>Get value by element index</p>
  19. 	* @param index index of element.
  20. 	* @return  Value of element with specified index.
  21. 	*/
  22. 	T get(int index);
  23.  
  24.    /**
  25. 	* <p>Set the same value for all elements in the specified index range</p>
  26. 	* @param start the beginning index, inclusive.
  27. 	* @param end the ending index, exclusive.
  28. 	* @param value value for .
  29. 	* @return This object.
  30. 	*/
  31. 	SegmentedArray<T> set(int start, int end, T value);
  32.  
  33.    /**
  34. 	* <p>Returns the index within this array of the first occurrence of the specified value,
  35. 	* starting at the specified index. If no such value of k exists, then -1 is returned.</p>
  36. 	* @param value the T-based value for which to search.
  37. 	* @param fromIndex the index from which to start the search.
  38. 	* @return the index within this array of the first occurrence of the element with specified value,
  39. 	* starting at the specified index.
  40. 	*/
  41. 	int indexOf(T value, int fromIndex);
  42.  
  43.    /**
  44. 	* <p>Find minimum value in the specified indexes range</p>
  45. 	* @param start the beginning index, inclusive.
  46. 	* @param end the ending index, exclusive.
  47. 	* @return Minimum value.
  48. 	*/
  49. 	T minValue(int from, int to);
  50. }
  51.  
  52. class DummyArray implements SegmentedArray<Integer> {
  53. 	public Integer get(int index){
  54. 		return 0;
  55. 	}
  56.  
  57. 	public SegmentedArray<Integer> set(int start, int end, Integer value){
  58. 		return this;
  59. 	}
  60.  
  61.  
  62. 	public int indexOf(Integer value, int fromIndex){
  63. 		return 0;
  64. 	}
  65.  
  66.  
  67. 	public Integer minValue(int from, int to){
  68. 		return 0;
  69. 	}
  70.  
  71. }
  72.  
  73. /* Name of the class has to be "Main" only if the class is public. */
  74. class Ideone
  75. {
  76. 	public static void testSegmentedArray1(SegmentedArray<Integer> arr) {
  77. 		long start = System.nanoTime();
  78.  
  79. 		//Предположим что параметром метода является 
  80. 		//нулевой массив размера 1000
  81. 		if (arr.get(30)!=0)
  82. 			System.out.println("Non zero element in empty array");
  83. 		if (arr.minValue(0,1000)!=0)
  84. 			System.out.println("Non zero minimum in empty array");
  85. 		arr.set(0,200,1);
  86. 		arr.set(100,300,2);
  87. 		arr.set(150,160,1);
  88. 		if (arr.get(30)!=1)
  89. 			System.out.println("Element is not set");
  90. 		if (arr.get(300)!=0)
  91. 			System.out.println("End should be exclusive");	
  92. 		if (arr.get(125)!=2)
  93. 			System.out.println("Element is not set (2 assigments)");
  94. 		if (arr.get(150)!=1)
  95. 			System.out.println("Element is not set (3 assigments)");	
  96. 		if (arr.minValue(100,300)!=1)
  97. 			System.out.println("Wrong minimum calculation (two values)");
  98. 		if (arr.minValue(100,301)!=0)
  99. 			System.out.println("Wrong minimum calculation (two values and zero)");
  100. 		if (arr.minValue(155,156)!=1)
  101. 			System.out.println("Wrong minimum calculation (single element)");
  102.  
  103. 		long finish = System.nanoTime();
  104.  
  105. 		System.out.println("Test 1 (small array) completed!");
  106. 		System.out.format("Time elapsed: %.3f ms", (finish-start)/1e6); // ns -> ms
  107.  
  108. 	}
  109.  
  110. 	public static void main (String[] args) throws java.lang.Exception
  111. 	{
  112. 		testSegmentedArray1(new DummyArray());
  113. 	}
  114. }
Success #stdin #stdout 0.13s 320576KB
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Standard input is empty
stdout
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Element is not set
Element is not set (2 assigments)
Element is not set (3 assigments)
Wrong minimum calculation (two values)
Wrong minimum calculation (single element)
Test 1 (small array) completed!
Time elapsed: 0.683 ms
https://ideone.com/yl2XFC
Dummy Segmented Array Test
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
secret

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