F_rch[T] = object
  lb*: T
  ub*: T
  add*: T

RangeChminChmaxRangeSumMaxMin[T] = object
  seg*: SegmentTreeBeats[S_rch[T], F_rch[T]]
  inf*, zero*: T

S_rch[T] = object
  max*: T
  max2*: T
  min*: T
  min2*: T
  sum*: T
  sz*: int
  n_min*: int
  n_max*: int
  fail*: bool

CPLIB_COLLECTIONS_SEGTREE_BEATS_TEMPLATE = 1

proc `$`[T](self: var RangeChminChmaxRangeSumMaxMin[T]): string

proc `[]=`[T](self: var RangeChminChmaxRangeSumMaxMin[T]; p: Natural; val: T): S_rch[
    T]

proc `[]`[T](self: var RangeChminChmaxRangeSumMaxMin[T];
             p: Natural or HSlice[int, int]): S_rch[T]

proc add[T](self: var RangeChminChmaxRangeSumMaxMin[T];
            segment: HSlice[int, int]; val: T)

proc chmax[T](self: var RangeChminChmaxRangeSumMaxMin[T];
              segment: HSlice[int, int]; val: T)

proc chmin[T](self: var RangeChminChmaxRangeSumMaxMin[T];
              segment: HSlice[int, int]; val: T)

proc initRangeChminChmaxRangeSumMaxMin(v: seq[float]): RangeChminChmaxRangeSumMaxMin[
    float] {....raises: [Exception], tags: [RootEffect].}

proc initRangeChminChmaxRangeSumMaxMin(v: seq[int32]): RangeChminChmaxRangeSumMaxMin[
    int32] {....raises: [Exception], tags: [RootEffect].}

proc initRangeChminChmaxRangeSumMaxMin(v: seq[int]): RangeChminChmaxRangeSumMaxMin[
    int] {....raises: [Exception], tags: [RootEffect].}

proc initRangeChminChmaxRangeSumMaxMin[T](v: seq[T]; inf: T; zero: T): auto

proc len[T](self: var RangeChminChmaxRangeSumMaxMin[T]): int

proc update[T](self: var RangeChminChmaxRangeSumMaxMin[T]; p: Natural; val: T)