def drop64
import bend-collections-laws-crypto@1.0.0.0/proofs/math/random/chacha8/stream.bend as Streamimport Base
import bend-collections-laws-crypto@1.0.0.0/src/math/u64.bend as W
21def drop64(n: Nat, xs: List<&2, W.U64>) -> List<&2, W.U64>:
22 match n xs:
23 case 0n _:
24 xs
25 case 1n+p Nil{}:
26 []
27 case 1n+p Con{x, rest}:
28 drop64(p, rest)