static int countNonEmptySubstr ( String str ) {
  int n = str . length ( ) ;
  return n * ( n + 1 ) / 2 ;
}

static int countNonEmptySubstr ( String str ) { int n = str . length ( ) ; return n * ( n + 1 ) / 2 ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (return_statement (binary_expression left: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (decimal_integer_literal)))))