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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. Scanner sc = new Scanner(System.in);
  13. int n = sc.nextInt();
  14. int arr []= new int[n];
  15.  
  16. for(int i=0;i<n;i++){
  17. arr[i] = sc.nextInt();
  18. }
  19.  
  20. HashMap<Integer,Integer> map = new HashMap<>();
  21.  
  22. for(int i=0;i<n;i++){
  23. int val = arr[i];
  24. map.put(val,map.getOrDefault(val,0)+1);
  25. }
  26.  
  27.  
  28. System.out.println(map);
  29.  
  30. }
  31. }
Success #stdin #stdout 0.11s 56460KB
stdin
5
1 1 2 2 5
stdout
{1=2, 2=2, 5=1}