GR1

#include <iostream>
using namespace std;
void groupElements(int arr[], int n)
{ 
bool *visited = new bool[n];
for (int i=0; i<n; i++)
visited[i] = false;
for (int i=0; i<n; i++)
    {
if (!visited[i])
{
cout << arr[i] << " ";
for (int j=i+1; j<n; j++)
{
if (arr[i] == arr[j])
{
cout << arr[i] << " ";
visited[j] = true;
}
}
}
}

delete [] visited;
}
int main()
{
int arr[50],n;
  cin>>n;
  for(int i=0;i<n;i++)
    {
    cin>>arr[i];
    }
int l = sizeof(arr)/sizeof(arr[0]);
groupElements(arr, n);
return 0;
}