static long help ( int [ ] w , int X ) {
  int n = w . length ;
  if ( n == 1 ) {
    return w [ 0 ] == X ? 1 : 0 ;
  }
  int ans = 0 ;
  int p = n / 2 ;
  HashMap < Integer , Integer > dic = getDic ( Arrays . copyOfRange ( w , p , n ) ) ;
  int [ ] first = Arrays . copyOfRange ( w , 0 , p ) ;
  for ( int i = 0 ;
  i < ( 1 << p ) ;
  i ++ ) {
    int cur = getSum ( first , i ) ;
    ans += dic . getOrDefault ( X - cur , 0 ) ;
  }
  return ans ;
}

static long help ( int [ ] w , int X ) { int n = w . length ; if ( n == 1 ) { return w [ 0 ] == X ? 1 : 0 ; } int ans = 0 ; int p = n / 2 ; HashMap < Integer , Integer > dic = getDic ( Arrays . copyOfRange ( w , p , n ) ) ; int [ ] first = Arrays . copyOfRange ( w , 0 , p ) ; for ( int i = 0 ; i < ( 1 << p ) ; i ++ ) { int cur = getSum ( first , i ) ; ans += dic . getOrDefault ( X - cur , 0 ) ; } return ans ; }
(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: (field_access object: (identifier) field: (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (return_statement (ternary_expression condition: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (identifier)) consequence: (decimal_integer_literal) alternative: (decimal_integer_literal))))) (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: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier) (type_identifier))) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier) (identifier))))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal) (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: (parenthesized_expression (binary_expression left: (decimal_integer_literal) right: (identifier)))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)) (decimal_integer_literal))))))) (return_statement (identifier))))