def csub_fin

import bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend as Field

import Base

256def csub_fin(r: Cr, x: List<&2, U32>) -> List<&2, U32>:
257  match r:
258    case Cr{s, c}:
259      select(c, x, s)

Uses (4)