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  1. using System;
  2.  
  3. public class Test
  4. {
  5. 	public static List<int> getMax(List<string> operations)
  6. 	{
  7. 	    Stack<int> arr = new Stack<int>();
  8. 	    List<int> ans = new List<int>();
  9.  
  10. 	    SortedDictionary<int, int> occurences = new SortedDictionary<int, int>();
  11.  
  12. 	    foreach (var query in operations)
  13. 	    {
  14. 	        if (query.Length > 1)
  15. 	        {
  16. 	            string x = query.Substring(2);
  17. 	            int value = int.Parse(x);
  18.  
  19. 	            arr.Push(value);
  20.  
  21. 	            if (occurences.ContainsKey(value))
  22. 	            {
  23. 	                occurences[value]++;
  24. 	            }
  25. 	            else
  26. 	            {
  27. 	                occurences.Add(value, 1);
  28. 	            }
  29. 	        }
  30. 	        else if (query == "2")
  31. 	        {
  32. 	            occurences[arr.Peek()]--;
  33.  
  34. 	            if (occurences[arr.Peek()] == 0)
  35. 	            {
  36. 	                occurences.Remove(arr.Peek());
  37. 	            }
  38.  
  39. 	            arr.Pop();
  40. 	        }
  41. 	        else
  42. 	        {
  43. 	            ans.Add(occurences.Last().Key);
  44. 	        }
  45. 	    }
  46.  
  47. 	    return ans;
  48. 	}
  49.  
  50. 	public static void Main()
  51. 	{
  52. 		// your code goes here
  53. 	}
  54. }
  55.  
Success #stdin #stdout 0.04s 21724KB
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https://ideone.com/MN1ybC
language:
C# (NET 6.0)
created:
252 days ago
visibility:
secret

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