static int maxProd ( int N ) {
  if ( N == 0 ) return 1 ;
  if ( N < 10 ) return N ;
  return Math . max ( maxProd ( N / 10 ) * ( N % 10 ) , maxProd ( N / 10 - 1 ) * 9 ) ;
}

static int maxProd ( int N ) { if ( N == 0 ) return 1 ; if ( N < 10 ) return N ; return Math . max ( maxProd ( N / 10 ) * ( N % 10 ) , maxProd ( N / 10 - 1 ) * 9 ) ; }
(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 (identifier))) (return_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) right: (decimal_integer_literal)))))))