public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int [ ] ar = new int [ n + 1 ] ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    ar [ i ] = sc . nextInt ( ) ;
  }
  Arrays . sort ( ar ) ;
  long sum1 = 0 ;
  long sum2 = 0 ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    if ( i < ( n + 1 - i ) ) {
      sum1 += ar [ i ] ;
      sum2 += ar [ n + 1 - i ] ;
    }
    else if ( i == ( n + 1 - i ) ) {
      sum2 += ar [ n + 1 - i ] ;
    }
  }
  long sum = sum1 * sum1 + sum2 * sum2 ;
  System . out . println ( sum ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int [ ] ar = new int [ n + 1 ] ; for ( int i = 1 ; i <= n ; i ++ ) { ar [ i ] = sc . nextInt ( ) ; } Arrays . sort ( ar ) ; long sum1 = 0 ; long sum2 = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { if ( i < ( n + 1 - i ) ) { sum1 += ar [ i ] ; sum2 += ar [ n + 1 - i ] ; } else if ( i == ( n + 1 - i ) ) { sum2 += ar [ n + 1 - i ] ; } } long sum = sum1 * sum1 + sum2 * sum2 ; System . out . println ( sum ) ; }
(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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (identifier) right: (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: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (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 (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier))))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier)))))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier))))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier)))))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (binary_expression left: (identifier) right: (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))