Find Duplicate Elements in Array

import java.util.*;
class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int[] arr = new int[n];
for(int i=0;i<n;i++) arr[i]=sc.nextInt();
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
if(arr[i]==arr[j]){
System.out.print(arr[i]+" ");
break;
}
}
}
}
}