拉丁方陣和約瑟夫環 鍊錶 python

# -*- coding=utf-8 -*-

# software: 演算法學習
# datetime:2020/4/9 9:14 上午
class
node
(object):
""" 鍊錶的節點物件：包含資料與和指標域
"""def__init__
(self, data=
none
,next
=none):
self._value = data
self._next =
next
defget_value
(self)
:return self._value
defget_next
(self)
:return self._next
defset_value
(self, new_data)
: self._value = new_data
defset_next
(self, new_next)
: self._next = new_next
class
cyclelinklist
(object):
def__init__
(self)
:# 宣告乙個尾節點
self._tail = node(
) self._tail.set_next(self._tail)
self._length =
0def
head
(self)
:"""
鍊錶的第乙個元素(除去頭節點)
:return:
"""return self._tail.get_next(
)def
tail
(self)
:"""
鍊錶的最後乙個元素
:return:
"""return self._tail
defis_empty
(self)
:"""
判斷鍊錶是否為空
:return:
"""return self._tail.get_next(
)== self._tail
defsize
(self)
:"""
鍊錶的大小
:return:
"""return self._length
defadd(self, value)
:"""
從頭部插入節點
:param value:
:return:
"""new_node = node(
) new_node.set_value(value)
new_node.set_next(self._tail.get_next())
self._tail.set_next(new_node)
self._length +=
1def
(self, value)
:"""
從尾部追加節點
:param value:
:return:
"""new_node = node(
) new_node.set_value(value)
new_node.set_next(self._tail)
head = self._tail.get_next(
) tmp = head
while head != self._tail:
tmp = head
head = head.get_next(
) tmp.set_next(new_node)
self._length +=
1def
cycle
(self, m)
:"""
約瑟夫環
:return:
"""str1 =
"" current = self._tail
tmp = self._tail
while current.get_next(
)!= current:
count = m
for i in
range(1
, count +1)
: tmp = current
current = current.get_next(
)if current == self._tail:
current = current.get_next(
) tmp.set_next(current)
if current.get_next(
)== current:
break
tmp.set_next(current.get_next())
str1 +=
str(current.get_value())
+"-->"
return str1
deflatin_policy
(self, n)
:"""
拉丁方陣
:param n:
:return:
"""current = self._tail
tmp = self._tail
for i in
range
(n):
str1 =
""for j in
range
(self.size())
: tmp = current
current = current.get_next(
) str1 +=
str(current.get_value())
+" "
print
(str1)
tmp = current
current = current.get_next(
)if current == self._tail:
current = current.get_next(
) tmp.set_next(current)
if __name__ ==
'__main__'
: cycle_list = cyclelinklist(
)for i in
range(1
,6):
current = cycle_list.tail(
).get_next(
) tmp = cycle_list.tail(
) l =
""while current.get_next(
)!= tmp:
l +=
str(current.get_value())
+" "
current = current.get_next(
) l +=
str(current.get_value())
print
("初始化遍歷鍊錶的值"
, l)
# 拉丁方陣
cycle_list.latin_policy(5)
# 死亡順序
print
(cycle_list.cycle(3)
)

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