public static String process ( TestCase testCase ) {
  final int N = testCase . N ;
  return String . valueOf ( IntStream . range ( 1 , 10 ) . map ( i -> i * ALL_DIGITS_SAME ) . filter ( contestNum -> contestNum >= N ) . findFirst ( ) . orElseThrow ( ( ) -> new IllegalArgumentException ( "N is too large: " + N ) ) ) ;
}

public static String process ( TestCase testCase ) { final int N = testCase . N ; return String . valueOf ( IntStream . range ( 1 , 10 ) . map ( i -> i * ALL_DIGITS_SAME ) . filter ( contestNum -> contestNum >= N ) . findFirst ( ) . orElseThrow ( ( ) -> new IllegalArgumentException ( " N ▁ is ▁ too ▁ large : ▁ " + N ) ) ) ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration (modifiers) type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (identifier)))) (return_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (method_invocation object: (method_invocation object: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (decimal_integer_literal))) name: (identifier) arguments: (argument_list (lambda_expression parameters: (identifier) body: (binary_expression left: (identifier) right: (identifier))))) name: (identifier) arguments: (argument_list (lambda_expression parameters: (identifier) body: (binary_expression left: (identifier) right: (identifier))))) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (lambda_expression parameters: (formal_parameters) body: (object_creation_expression type: (type_identifier) arguments: (argument_list (binary_expression left: (string_literal) right: (identifier))))))))))))