static double rangeSum ( double N , double L , double R ) {
  return sumTillX ( R , N ) - sumTillX ( L - 1 , N ) ;
}

static double rangeSum ( double N , double L , double R ) { return sumTillX ( R , N ) - sumTillX ( L - 1 , N ) ; }
(method_declaration (modifiers) type: (floating_point_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (floating_point_type) name: (identifier)) (formal_parameter type: (floating_point_type) name: (identifier)) (formal_parameter type: (floating_point_type) name: (identifier))) body: (block (return_statement (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier)))))))