static boolean checkFibinnary ( int n ) {
  int prev_last = 0 ;
  while ( n != 0 ) {
    if ( ( n & 1 ) != 0 && prev_last != 0 ) return false ;
    prev_last = n & 1 ;
    n >>= 1 ;
  }
  return true ;
}

static boolean checkFibinnary ( int n ) { int prev_last = 0 ; while ( n != 0 ) { if ( ( n & 1 ) != 0 && prev_last != 0 ) return false ; prev_last = n & 1 ; n >>= 1 ; } return true ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (return_statement (false))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (true))))