9:3

set<int> setInsert(int arr[],int n)
{
    set<int>s;

      for(int i=0;i<n;i++)
    {
        s.insert(arr[i]);
    }


    return s;

}


void setDisplay(set<int>s)
{
     for(auto u:s) cout<<u<<" ";

    cout<<endl;
}


void setErase(set<int>&s,int x)
{
   if(s.erase(x))
    cout<<"erased "<<x;

    else
    cout<<"not found";


    cout<<endl;
}