public static void main ( String [ ] args ) {
  try ( Scanner scanner = new Scanner ( System . in ) ) {
    String string = scanner . nextLine ( ) ;
    System . out . println ( string . chars ( ) . filter ( x -> x == '1' ) . count ( ) ) ;
  }
}

public static void main ( String [ ] args ) { try ( Scanner scanner = new Scanner ( System . in ) ) { String string = scanner . nextLine ( ) ; System . out . println ( string . chars ( ) . filter ( x -> x == '1' ) . count ( ) ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (try_with_resources_statement resources: (resource_specification (resource type: (type_identifier) name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (lambda_expression parameters: (identifier) body: (binary_expression left: (identifier) right: (character_literal))))) name: (identifier) arguments: (argument_list)))))))))