static int digitNumber ( long n ) {
  if ( n == 0 ) return 1 ;
  if ( n == 1 ) return 9 ;
  if ( n % 2 != 0 ) {
    int temp = digitNumber ( ( n - 1 ) / 2 ) % mod ;
    return ( 9 * ( temp * temp ) % mod ) % mod ;
  }
  else {
    int temp = digitNumber ( n / 2 ) % mod ;
    return ( temp * temp ) % mod ;
  }
}

static int digitNumber ( long n ) { if ( n == 0 ) return 1 ; if ( n == 1 ) return 9 ; if ( n % 2 != 0 ) { int temp = digitNumber ( ( n - 1 ) / 2 ) % mod ; return ( 9 * ( temp * temp ) % mod ) % mod ; } else { int temp = digitNumber ( n / 2 ) % mod ; return ( temp * temp ) % 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: (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: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)))) right: (identifier)))) (return_statement (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))) right: (identifier))) right: (identifier)))) alternative: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (identifier)))) (return_statement (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (identifier)))))))