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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. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		int arr1[] =  {2,4,2,2,1,1};
  14. 		int arr2[] = {1,1,2,2,4,9};
  15.  
  16. 		Map<Integer,Integer> map = new HashMap<>();
  17. 		//Inserting all the elements along with their frequencies into the hashmap of arr1
  18. 		for(int i = 0;i<arr1.length;i++){
  19. 			map.put(arr1[i],map.getOrDefault(arr1[i],0) + 1);
  20. 		}
  21.  
  22. 		//Check if map has the same or greater frequency of numbers
  23. 		for(int i=0;i<arr2.length;i++){
  24. 			if(!map.containsKey(arr2[i])){
  25. 				System.out.println("Array2 is not a subset of Array1");
  26. 				return;
  27. 			}
  28. 		  if(map.get(arr2[i]) == 0){
  29. 		  	System.out.println("Array2 is not a subset of Array1");
  30. 			return;
  31. 		  }
  32.  
  33. 		  int countOfElement = map.get(arr2[i]);
  34. 		  map.put(arr2[i],countOfElement -1);
  35. 		}
  36.  
  37. 		System.out.println("Arr2 is a subset of Arr1");
  38. 	}
  39. }
Success #stdin #stdout 0.09s 54612KB
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Standard input is empty
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Array2 is not a subset of Array1
https://ideone.com/ZrirG4
language:
Java (HotSpot 12)
created:
10 days ago
visibility:
public

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