* Add `using namespace std`

* Add `using namespace std`
* Rename some functions (e.g. `zip` -> `co_zip`, `meow` -> `co_upto`)
* Add missing includes
* Other minor changes (see commit messages)

_Originally posted by @JMazurkiewicz in https://github.com/microsoft/STL/pull/4722_

_Originally posted by @Zipitn in https://github.com/Zipitn/shiny-system/issues/1_

from collections import Counter

counts = Counter()
counts1 = []
for row in data:
counts[row[IMPORT_COMMUNICATION]]