public static void main ( String [ ] args ) throws Exception {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  String input = br . readLine ( ) ;
  int n = Integer . parseInt ( input . replaceAll ( "," , "" ) ) ;
  input = br . readLine ( ) ;
  int [ ] a = Arrays . stream ( input . split ( " " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ;
  int k = a [ 0 ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( a [ i ] > k ) k = a [ i ] ;
  }
  int A = 0 ;
  int B = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    B += a [ i ] ;
    A += k - a [ i ] ;
  }
  int diff = B - A ;
  if ( diff >= 0 ) {
    System . out . println ( ( diff / n ) + k + 1 ) ;
  }
  else {
    System . out . println ( k ) ;
  }
}

public static void main ( String [ ] args ) throws Exception { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; String input = br . readLine ( ) ; int n = Integer . parseInt ( input . replaceAll ( " , " , " " ) ) ; input = br . readLine ( ) ; int [ ] a = Arrays . stream ( input . split ( " ▁ " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ; int k = a [ 0 ] ; for ( int i = 0 ; i < n ; i ++ ) { if ( a [ i ] > k ) k = a [ i ] ; } int A = 0 ; int B = 0 ; for ( int i = 0 ; i < n ; i ++ ) { B += a [ i ] ; A += k - a [ i ] ; } int diff = B - A ; if ( diff >= 0 ) { System . out . println ( ( diff / n ) + k + 1 ) ; } else { System . out . println ( k ) ; } }
(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)))))))) (local_variable_declaration type: (type_identifier) 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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal) (string_literal))))))) (expression_statement (assignment_expression left: (identifier) right: (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: (identifier) name: (identifier) arguments: (argument_list (string_literal))))) name: (identifier) arguments: (argument_list (method_reference (identifier) (identifier)))) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (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: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (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: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (identifier)) right: (decimal_integer_literal)))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))))