#has_33([1, 3, 3]) → True
#has_33([1, 3, 1, 3]) → False
#has_33([3, 1, 3]) → False

def has_33(nums):
    r=""
    true=0
    for i in nums:
      if r==i:
          true+=1
      else:
          pass
      r=i
    #print (true)
    if true>0:
        return True
    else:
        return False

print(has_33([1,3,3]))
print(has_33([13,1,3,1]))
print(has_33([3,3,1]))