static int cntSubsets ( int [ ] arr , int n ) {
  int max = ( int ) Math . pow ( 2 , n ) ;
  int result = 0 ;
  for ( int i = 0 ;
  i < max ;
  i ++ ) {
    int counter = i ;
    if ( ( counter & ( counter >> 1 ) ) > 0 ) continue ;
    result ++ ;
  }
  return result ;
}

static int cntSubsets ( int [ ] arr , int n ) { int max = ( int ) Math . pow ( 2 , n ) ; int result = 0 ; for ( int i = 0 ; i < max ; i ++ ) { int counter = i ; if ( ( counter & ( counter >> 1 ) ) > 0 ) continue ; result ++ ; } return result ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (cast_expression type: (integral_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (decimal_integer_literal))) consequence: (continue_statement)) (expression_statement (update_expression (identifier))))) (return_statement (identifier))))