public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  char [ ] a , b ;
  long A = sc . nextLong ( ) ;
  long B = sc . nextLong ( ) ;
  a = String . valueOf ( A ) . toCharArray ( ) ;
  b = String . valueOf ( B + 1 ) . toCharArray ( ) ;
  System . out . println ( B - A + 1 - ( f ( b , 0 ) - f ( a , 0 ) ) ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; char [ ] a , b ; long A = sc . nextLong ( ) ; long B = sc . nextLong ( ) ; a = String . valueOf ( A ) . toCharArray ( ) ; b = String . valueOf ( B + 1 ) . toCharArray ( ) ; System . out . println ( B - A + 1 - ( f ( b , 0 ) - f ( a , 0 ) ) ) ; }
(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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)) right: (parenthesized_expression (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal))) right: (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))))))))))