static int maxDiff ( int [ ] arr , int n ) {
  int result = 0 ;
  Arrays . sort ( arr ) ;
  for ( int i = 0 ;
  i < n - 1 ;
  i ++ ) {
    if ( arr [ i ] != arr [ i + 1 ] ) result += Math . abs ( arr [ i ] ) ;
    else i ++ ;
  }
  if ( arr [ n - 2 ] != arr [ n - 1 ] ) result += Math . abs ( arr [ n - 1 ] ) ;
  return result ;
}

static int maxDiff ( int [ ] arr , int n ) { int result = 0 ; Arrays . sort ( arr ) ; for ( int i = 0 ; i < n - 1 ; i ++ ) { if ( arr [ i ] != arr [ i + 1 ] ) result += Math . abs ( arr [ i ] ) ; else i ++ ; } if ( arr [ n - 2 ] != arr [ n - 1 ] ) result += Math . abs ( arr [ n - 1 ] ) ; return result ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (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 (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) consequence: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) alternative: (expression_statement (update_expression (identifier)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) consequence: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (return_statement (identifier))))