null created by zeapo - https://repl.it/IW9F/0

IW9F-0.py

def fn(arr):
  target = [1, 3, 4]
  j = 0
  
  for el in arr:
    if el == target[j]:
      j += 1
    else:
      j = 0
      
    if j == len(target):
      return True
    
  return False

assert fn([0, 1, 2, 1, 3, 4, 5]) == True
assert fn([1, 3, 4]) == True
assert fn([1, 3]) == False
assert fn([]) == False
assert fn([1, 3, 5]) == False