static boolean CheckArray ( int arr [ ] , int n ) {
  int prod = 1 ;
  ArrayList < Integer > freq = new ArrayList < > ( ) ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) {
    freq . add ( arr [ i ] ) ;
    prod *= arr [ i ] ;
  }
  int root = ( int ) Math . sqrt ( prod ) ;
  if ( root * root == prod ) {
    if ( freq . contains ( root ) & freq . lastIndexOf ( root ) != ( freq . size ( ) ) ) {
      return true ;
    }
  }
  return false ;
}

static boolean CheckArray ( int arr [ ] , int n ) { int prod = 1 ; ArrayList < Integer > freq = new ArrayList < > ( ) ; for ( int i = 0 ; i < n ; ++ i ) { freq . add ( arr [ i ] ) ; prod *= arr [ i ] ; } int root = ( int ) Math . sqrt ( prod ) ; if ( root * root == prod ) { if ( freq . contains ( root ) & freq . lastIndexOf ( root ) != ( freq . size ( ) ) ) { return true ; } } return false ; }
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