UnionFind = ref object
  count*: int
  par_or_siz: seq[int]

CPLIB_COLLECTIONS_UNIONFIND = 1

proc initUnionFind(N: int): UnionFind {....raises: [], tags: [].}

proc issame(self: UnionFind; x: int; y: int): bool {....raises: [], tags: [].}

proc root(self: UnionFind; x: int): int {....raises: [], tags: [].}

proc roots(self: UnionFind): seq[int] {....raises: [], tags: [].}

proc siz(self: UnionFind; x: int): int {....raises: [], tags: [].}

proc unite(self: UnionFind; x: int; y: int) {....raises: [], tags: [].}