static int per ( int n ) {
  if ( n == 0 ) return 3 ;
  if ( n == 1 ) return 0 ;
  if ( n == 2 ) return 2 ;
  return per ( n - 2 ) + per ( n - 3 ) ;
}

static int per ( int n ) { if ( n == 0 ) return 3 ; if ( n == 1 ) return 0 ; if ( n == 2 ) return 2 ; return per ( n - 2 ) + per ( n - 3 ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (return_statement (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))))))