def count_len
import bend-collections@1.0.0.0/src/containers/bitlist.bend as Bitlistimport Base
import bend-collections@1.0.0.0/src/containers/dynamic_array.bend as D
213def count_len(+lim: Maybe<&2, Nat>, +n: Nat, r: D.DynArray<&2, U32> & Nat) -> Bitlist & Nat:
214 (w, +k) = r
215 count_fin(lim, n, count_go(k, (w, 0n), 0n))