static int countPermutations ( int n ) {
  if ( n == 1 ) {
    return 0 ;
  }
  return ( ( int ) power ( 2 , n - 1 ) - 2 ) % mod ;
}

static int countPermutations ( int n ) { if ( n == 1 ) { return 0 ; } return ( ( int ) power ( 2 , n - 1 ) - 2 ) % mod ; }
(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: (block (return_statement (decimal_integer_literal)))) (return_statement (binary_expression left: (parenthesized_expression (binary_expression left: (cast_expression type: (integral_type) value: (method_invocation name: (identifier) arguments: (argument_list (decimal_integer_literal) (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (decimal_integer_literal))) right: (identifier)))))