static int get_permutation ( int arr [ ] , int n ) {
  Arrays . sort ( arr ) ;
  int result = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    result += Math . abs ( arr [ i ] - ( i + 1 ) ) ;
  }
  return result ;
}

static int get_permutation ( int arr [ ] , int n ) { Arrays . sort ( arr ) ; int result = 0 ; for ( int i = 0 ; i < n ; i ++ ) { result += Math . abs ( arr [ i ] - ( i + 1 ) ) ; } return result ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) 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: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))))))))) (return_statement (identifier))))