public static void main ( String [ ] args ) {
  int n = nextInt ( ) , m = nextInt ( ) ;
  long h = min ( n , m ) , w = max ( n , m ) ;
  long ans = 0 ;
  if ( h == 1 && w == 1 ) {
    ans = 1 ;
  }
  else if ( h == 1 && w != 1 ) {
    ans = w - 2 ;
  }
  else ans = ( h - 2 ) * ( w - 2 ) ;
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { int n = nextInt ( ) , m = nextInt ( ) ; long h = min ( n , m ) , w = max ( n , m ) ; long ans = 0 ; if ( h == 1 && w == 1 ) { ans = 1 ; } else if ( h == 1 && w != 1 ) { ans = w - 2 ; } else ans = ( h - 2 ) * ( w - 2 ) ; System . out . println ( ans ) ; }
(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: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier)))) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) alternative: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))