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  1. using System;
  2. using System.Collections.Generic;
  3.  
  4. public class Test
  5. {
  6. 	static Random random = new Random();
  7.  
  8. 	public static List<int> GenerateRandom(int count)
  9. 	{
  10. 		List<int> result = new List<int>(count);
  11.  
  12. 		// generate count random values.
  13. 		HashSet<int> candidates = new HashSet<int>();
  14. 		// top will overflow to Int32.MinValue at the end of the loop
  15. 		for (Int32 top = Int32.MaxValue - count + 1; top > 0; top++)
  16. 		{
  17. 			// May strike a duplicate.
  18. 			int value = random.Next(top);
  19. 			if (candidates.Add(value))
  20. 			{
  21. 				result.Add(value);
  22. 			}
  23. 			else
  24. 			{
  25. 				result.Add(top);
  26. 				candidates.Add(top);
  27. 			}
  28. 		}
  29.  
  30. 		return result;
  31. 	}
  32. 	public static void Main()
  33. 	{
  34. 		List<int> vals = GenerateRandom(10);
  35. 		Console.WriteLine("Result: " + vals.Count);
  36. 		vals.ForEach(Console.WriteLine);
  37. 	}
  38. }
Success #stdin #stdout 0.04s 34016KB
comments (?)
stdin 
Standard input is empty
stdout 
Result: 10
1266576738
1988796064
1296699947
644552315
1095650138
534957753
553590513
474913018
1925059559
1750148947
https://ideone.com/PSSney
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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