def rsum
import minebender-game@1.0.0.0/proof_gen.bend as ProofGenimport Base
1057# Each row near the first click's row, counted c times.
1058def rsum(+fy: Nat, +c: Nat, ys: List<&2, Nat>) -> Nat:
1059 match ys:
1060 case Nil{}:
1061 0n
1062 case y <> t:
1063 Nat.add(Bool.pick(Nat, nr(fy, y), c, 0n), rsum(fy, c, t))