static int countWays ( int N ) {
  int E = ( N * ( N - 1 ) ) / 2 ;
  if ( N == 1 ) return 0 ;
  return ( int ) Math . pow ( 2 , E - 1 ) ;
}

static int countWays ( int N ) { int E = ( N * ( N - 1 ) ) / 2 ; if ( N == 1 ) return 0 ; return ( int ) Math . pow ( 2 , E - 1 ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (return_statement (cast_expression type: (integral_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (binary_expression left: (identifier) right: (decimal_integer_literal))))))))