Use query string and none query string in CI

[eluser]Unknown[/eluser]
Dear

I would like to use Query string and None query string.

Example.

Query string: /controller_name/index&stringname; ($config['enable_query_strings'] = TURE)
None query string: /controller_name/index/stringname ($config['enable_query_strings'] = FALSE)

I want to use both how can ?

Best regards