static int findAnswer ( int n , int [ ] arr ) {
  Arrays . sort ( arr ) ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < n / 2 ;
  ++ i ) {
    sum += ( arr [ i ] + arr [ n - i - 1 ] ) * ( arr [ i ] + arr [ n - i - 1 ] ) ;
  }
  return sum ;
}

static int findAnswer ( int n , int [ ] arr ) { Arrays . sort ( arr ) ; int sum = 0 ; for ( int i = 0 ; i < n / 2 ; ++ i ) { sum += ( arr [ i ] + arr [ n - i - 1 ] ) * ( arr [ i ] + arr [ n - i - 1 ] ) ; } return sum ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier))) body: (block (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))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (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: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))))) right: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))))))))) (return_statement (identifier))))