def hotPotato(namelist, num):
simqueue = Queue()
for name in namelist:
simqueue.enqueue(name)
while simqueue.size() > 1:
for i in range(num):
simqueue.enqueue(simqueue.dequeue())
simqueue.dequeue()
return simqueue.dequeue()
class DepthFirstOrder(object):
def __init__(self, G):
self.__marked = [False] * G.V()
self.__pre = [-1] * G.V()
self.__post = [-1] * G.V()
self.__pre_counter = 0
self.__post_counter = 0
self.__pre_order = Queue()
self.__post_order = Queue()
for v in range(G.V()):
if self.__marked[v] is False:
self.__dfs(G, v)
def __dfs(self, G, v):
self.__marked[v] = True
self.__pre[v] = self.__pre_counter
self.__pre_counter += 1
self.__pre_order.enqueue(v)
for w in G.adj(v):
if self.__marked[w] is False:
self.__dfs(G, w)
self.__post_order.enqueue(v)
self.__post[v] = self.__post_counter
self.__post_counter += 1
def pre(self, v):
self.__validate_vertex(v)
return self.__pre[v]
def post(self, v):
self.__validate_vertex(v)
return self.__post[v]
def pre_order(self):
return self.__pre_order
def post_order(self):
return self.__post_order
def reverse_post(self):
reverse = Stack()
for v in self.__post_order:
reverse.push(v)
return reverse
def __validate_vertex(self, v):
V = len(self.__marked)
if v < 0 or v > V:
raise ValueError("vertex %s is not between 0 and %s" % (v, V))
def __bfs(self, G, sources):
q = Queue()
for s in sources:
self.__marked[s] = True
self.__dist_to[s] = 0
q.enqueue(s)
while q.is_empty() is False:
v = q.dequeue()
for w in G.adj(v):
if self.__marked[w] is False:
self.__edge_to[w] = v
self.__dist_to[w] = self.__dist_to[v] + 1
self.__marked[w] = True
q.enqueue(w)
from pyqueue import Queue
q=Queue()
q.enqueue(6)
q.enqueue('cat')
q.enqueue(True)
print(q.size())
print(q.dequeue())
print(q.dequeue())
print(q.size())
from pyqueue import Queue
q = Queue()
q.enqueue(6)
q.enqueue("cat")
q.enqueue(True)
print(q.size())
print(q.dequeue())
print(q.dequeue())
print(q.size())