text: #!/usr/bin/env python3
  import re
  import sys
  from pprint import pprint
  from d19 import AoCVM
  INPUT = 'd16-input.txt'
  DEBUG = False
  
  # ------------------------------------------------
  # initialize
  # ------------------------------------------------
  vm = AoCVM(INPUT)
  
  # ------------------------------------------------
  # part 1
  # ------------------------------------------------
  print(sum([hv for n, hv in vm.samples_nmatch_hist.items() if n >= 3]))
  
  # ------------------------------------------------
  # part 2
  # ------------------------------------------------
  assert(len(vm.ambiguous_opcodes()) == 0)
  vm.execute(INPUT)
  print(vm.regs)
  
  # vim:sts=4:sw=4:et:
  