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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main()
  8. 	{
  9. 		            List<List<int>> lst = new List<List<int>>();
  10.             lst.Add(new List<int> { 1 });
  11.             lst.Add(new List<int> { 2 });
  12.             lst.Add(new List<int> { 3 });
  13.             lst.Add(new List<int> { 4, 5 });
  14.             lst.Add(new List<int> { 7 });
  15.             lst.Add(new List<int> { 4, 5 });
  16.             lst.Add(new List<int> { 1 });
  17.             lst.Add(new List<int> { 3 });
  18.  
  19.             var newList = lst.GroupBy(x => x, new Compare()).Where(x => x.Count() == 1).SelectMany(x => x);
  20.  
  21.             foreach (var x in newList)
  22.                 Console.WriteLine(string.Join(" ", x));
  23. 	}
  24.  
  25. }
  26.     public class Compare : IEqualityComparer<List<int>>
  27.     {
  28.         public bool Equals(List<int> x, List<int> y)
  29.         {
  30.             if (x.Count != y.Count) return false;
  31.             int n = x.Count;
  32.             for (int i = 0; i < n; i++)
  33.                 if (x[i] != y[i])
  34.                     return false;
  35.  
  36.             return true;
  37.         }
  38.         public int GetHashCode(List<int> x)
  39.         {
  40.             return 0;
  41.         }
  42.     }
Success #stdin #stdout 0.05s 24512KB
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https://ideone.com/Iiqye2
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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