public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  long n = sc . nextInt ( ) ;
  long count = 0 ;
  for ( int i = 0 ;
  i < 11 ;
  i ++ ) {
    count += ( n / pow10 ( i + 1 ) ) * pow10 ( i ) ;
    long target = ( n % pow10 ( i + 1 ) ) / pow10 ( i ) ;
    if ( target > 1 ) {
      count += pow10 ( i ) ;
    }
    else if ( target == 1 ) {
      count += n % pow10 ( i ) + 1 ;
    }
  }
  System . out . println ( count ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; long n = sc . nextInt ( ) ; long count = 0 ; for ( int i = 0 ; i < 11 ; i ++ ) { count += ( n / pow10 ( i + 1 ) ) * pow10 ( i ) ; long target = ( n % pow10 ( i + 1 ) ) / pow10 ( i ) ; if ( target > 1 ) { count += pow10 ( i ) ; } else if ( target == 1 ) { count += n % pow10 ( i ) + 1 ; } } System . out . println ( 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 (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))))) right: (method_invocation name: (identifier) arguments: (argument_list (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))))) right: (method_invocation name: (identifier) arguments: (argument_list (identifier)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation name: (identifier) arguments: (argument_list (identifier)))))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (method_invocation name: (identifier) arguments: (argument_list (identifier)))) right: (decimal_integer_literal))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))