import turtle
class Stack:
 def __init__(self):
  self.items = []
 def isEmpty(self):
  return len(self.items) == 0
 def push(self, item):
  self.items.append(item)
 def pop(self):
  return self.items.pop()
 def peek(self):
  if not self.isEmpty():
   return self.items[len(self.items) - 1]
  def size(self):
   return len(self.items)
def drawpole_3():#画出汉诺塔的poles
 t = turtle.Turtle()
 t.hideturtle()
 def drawpole_1(k):
  t.up()
  t.pensize(10)
  t.speed(100)
  t.goto(400*(k-1), 100)
  t.down()
  t.goto(400*(k-1), -100)
  t.goto(400*(k-1)-20, -100)
  t.goto(400*(k-1)+20, -100)
 drawpole_1(0)#画出汉诺塔的poles[0]
 drawpole_1(1)#画出汉诺塔的poles[1]
 drawpole_1(2)#画出汉诺塔的poles[2]
def creat_plates(n):#制造n个盘子
 plates=[turtle.Turtle() for i in range(n)]
 for i in range(n):
  plates[i].up()
  plates[i].hideturtle()
  plates[i].shape("square")
  plates[i].shapesize(1,8-i)
  plates[i].goto(-400,-90+20*i)
  plates[i].showturtle()
  return plates
def pole_stack():#制造poles的栈
 poles=[Stack() for i in range(3)]
 return poles
def moveDisk(plates,poles,fp,tp):#把poles[fp]顶端的盘子plates[mov]从poles[fp]移到poles[tp]
 mov=poles[fp].peek()
 plates[mov].goto((fp-1)*400,150)
 plates[mov].goto((tp-1)*400,150)
 l=poles[tp].size()#确定移动到底部的高度（恰好放在原来最上面的盘子上面）
 plates[mov].goto((tp-1)*400,-90+20*l)
def moveTower(plates,poles,height,fromPole, toPole, withPole):#递归放盘子
 if height >= 1:
  moveTower(plates,poles,height-1,fromPole,withPole,toPole)
  moveDisk(plates,poles,fromPole,toPole)
  poles[toPole].push(poles[fromPole].pop())
  moveTower(plates,poles,height-1,withPole,toPole,fromPole)
myscreen=turtle.Screen()
drawpole_3()
n=int(input("请输入汉诺塔的层数并回车:\n"))
plates=creat_plates(n)
poles=pole_stack()
for i in range(n):
 poles[0].push(i)
moveTower(plates,poles,n,0,2,1)
myscreen.exitonclick()