static int findLen ( int [ ] arr , int n , int m ) {
  Vector < Integer > filter = new Vector < > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) if ( ( arr [ i ] & m ) == m ) filter . add ( arr [ i ] ) ;
  if ( filter . size ( ) == 0 ) return 0 ;
  int c_and = filter . get ( 0 ) ;
  for ( int i = 1 ;
  i < filter . size ( ) ;
  i ++ ) c_and &= filter . get ( i ) ;
  if ( c_and == m ) return filter . size ( ) ;
  return 0 ;
}

static int findLen ( int [ ] arr , int n , int m ) { Vector < Integer > filter = new Vector < > ( ) ; for ( int i = 0 ; i < n ; i ++ ) if ( ( arr [ i ] & m ) == m ) filter . add ( arr [ i ] ) ; if ( filter . size ( ) == 0 ) return 0 ; int c_and = filter . get ( 0 ) ; for ( int i = 1 ; i < filter . size ( ) ; i ++ ) c_and &= filter . get ( i ) ; if ( c_and == m ) return filter . size ( ) ; return 0 ; }
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