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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. 		Scanner sc = new Scanner(System.in);
  14. 		int n = sc.nextInt();
  15. 		int arr1[] = new int[n];
  16. 		int m = sc.nextInt();
  17. 		int arr2[] = new int[m];
  18.  
  19. 		if(m>n){
  20. 			System.out.println("arr2 is not a subset of arr1");
  21. 			return;
  22. 		}
  23.  
  24. 		HashMap<Integer,Integer> map = new HashMap<>();
  25.  
  26. 		for(int i=0;i<n;i++){
  27. 			int val = sc.nextInt();
  28. 			map.put(val, map.getOrDefault(val,0)+1);
  29. 		}
  30.  
  31. 		for(int i=0;i<m;i++){
  32. 			int val = sc.nextInt();
  33. 			if(map.getOrDefault(val,0)==0){
  34. 				System.out.println("arr2 is not a subset of arr1");
  35. 				return;
  36. 			}
  37. 			map.put(map.get(val), map.get(val)-1);
  38. 		}
  39. 		System.out.println("arr2 is a subset of arr1"); 
  40.  
  41. 	}
  42. }
Success #stdin #stdout 0.15s 56564KB
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6
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9 3 1 5 2 1
9 1 1 1
stdout
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arr2 is not a subset of arr1
https://ideone.com/4afuVp
language:
Java (HotSpot 12)
created:
13 days ago
visibility:
public

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