def put.at
import bend-parallel@0.1.0.0/sort.bend as Sortimport Base
import bend-parallel@0.1.0.0/histogram.bend as Hist
285def put.at(+j: U32, +slot: U32, pm: Array<U32>, r: Array<U32> & U32) -> Hist.Two:
286 (t, +at) = r
287 Hist.Two{t[slot] <- (at + 1 : U32), pm[at] <- j}