names$[] = [ "panacea" "ichor" "gold" ]
vals[] = [ 3000 1800 2500 ]
wgts[] = [ 0.3 0.2 2.0 ]
vols[] = [ 0.025 0.015 0.002 ]
maxwgt = 25
maxvol = 0.25
#
n = len names$[]
len cnt[] n
global best[] bestval .
#
proc knapsack i val wgt vol .
   if i > n
      if val > bestval
         bestval = val
         best[] = cnt[]
      .
      return
   .
   cnt[i] = lower floor (wgt / wgts[i]) floor (vol / vols[i])
   while cnt[i] >= 0
      knapsack i + 1 val + cnt[i] * vals[i] wgt - cnt[i] * wgts[i] vol - cnt[i] * vols[i]
      cnt[i] -= 1
   .
.
knapsack 1 0 maxwgt maxvol
for i to n
   if best[i] > 0
      print best[i] & " " & names$[i]
   .
.