import timeit

if True:
  let xs = [[[x for x in range(30)] for y in range(30)] for z in range(30)]
  xs[29][29][29] = 42

  def breaks():
    let _z
    for ys in xs:
      for zs in ys:
        for z in zs:
          if z == 42:
            _z = z
            break
        else:
          continue
        break
      else:
        continue
      break
    else:
      return None
    return _z

  class FoundIt(Exception):
    pass

  def exceptions():
    let _z
    try:
      for ys in xs:
        for zs in ys:
          for z in zs:
            if z == 42:
              _z = z
              raise FoundIt()
    except FoundIt as e:
      return _z

  def _inner():
    for ys in xs:
      for zs in ys:
        for z in zs:
          if z == 42:
            return z

  def functions():
    return _inner()

  import gc
  gc.collect()
  print(min(timeit.timeit(breaks,number=100) for x in range(10)),"breaks")
  gc.collect()
  print(min(timeit.timeit(functions,number=100) for x in range(10)),"functions")
  gc.collect()
  print(min(timeit.timeit(exceptions,number=100) for x in range(10)),"exceptions")