SOCK MERCHANT PROGRAM JAVA

public class foxyCoders {
    // This class is about modifiers and packages 

 public static void main(String args[]) {

        int[] ar = {10, 20, 20, 10, 10, 30, 50, 10, 20}; 

 int n = 0;        System.out.println(game(n, ar));    }

    public static int game(int n, int[] ar) {

        ArrayList<Integer> fre = new ArrayList<Integer>();
        int m = 0;    for(int a =0 ;a<ar.length;a++){
        fre.add(ar[a]);    }

        Set<Integer> unique = new HashSet<Integer>(fre); 

 for (Integer key : unique) {
            System.out.println(key + ": " + Collections.frequency(fre, key)); 

 int count = (Collections.frequency(fre, key));
            m = m + count / 2;
            System.out.println(m);
 

         }

     n=m;     return n;    }
}// Hopes this solves your problem