public static void main ( String [ ] args ) throws IOException {
  BufferedReader stdin = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  stdin . readLine ( ) ;
  int [ ] nums = Arrays . stream ( stdin . readLine ( ) . split ( " " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ;
  Arrays . sort ( nums ) ;
  System . out . println ( nums [ nums . length - 1 ] - nums [ 0 ] ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader stdin = new BufferedReader ( new InputStreamReader ( System . in ) ) ; stdin . readLine ( ) ; int [ ] nums = Arrays . stream ( stdin . readLine ( ) . split ( " ▁ " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ; Arrays . sort ( nums ) ; System . out . println ( nums [ nums . length - 1 ] - nums [ 0 ] ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal))))) name: (identifier) arguments: (argument_list (method_reference (identifier) (identifier)))) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (decimal_integer_literal))) right: (array_access array: (identifier) index: (decimal_integer_literal))))))))