def findKthLargestByStack(self, nums: List[int], k: int) -> int:
"""
使用最大堆
"""
from heap import HeapMin
h = HeapMin([-i for i in nums])
for i in range(k):
ret = h.pop()
return -ret
def queueHeap(self):
size = len(self.__queue)+1
first = Node('', -1)
inf = Node('', float("inf"))
self.__heap_queue = HeapMin(first, size, inf)
for char in self.__queue:
try:
self.__heap_queue.insertNode(Node(char, self.__queue[char]))
except CapacityError as e:
print(e.expr.upper() + ":\n" + e.msg + "\n")
sys.exit(0)
def prim(self):
"""Algoritmo de Prim para hallar el árbol de expansión mínimo."""
bosque = []
aristas = HeapMin()
origen = self.inicio.obtener_elemento(0)
adyac = 0
while (adyac < origen['aristas'].tamanio()):
arista = origen['aristas'].obtener_elemento(adyac)
aristas.arribo([origen['info'], arista['destino']], arista['peso'])
adyac += 1
# print(bosque)
# print(aristas.elementos)
# print()
while (len(bosque) // 2 < self.tamanio() and not aristas.vacio()):
dato = aristas.atencion()
if (len(bosque) == 0) or (
(self.busqueda_prim(bosque, dato[1][0]) is not None) ^
(self.busqueda_prim(bosque, dato[1][1]) is not None)):
bosque.append(dato)
pos_vertice = self.buscar_vertice(dato[1][1])
nuevo_vertice = self.inicio.obtener_elemento(pos_vertice)
adyac = 0
while (adyac < nuevo_vertice['aristas'].tamanio()):
arista = nuevo_vertice['aristas'].obtener_elemento(adyac)
# print(arista)
aristas.arribo([nuevo_vertice['info'], arista['destino']],
arista['peso'])
adyac += 1
# print(bosque)
# print(aristas.elementos)
# a = input()
return bosque
def schargepmtn_nlogn(jobs_list):
R = HeapMin()
Q = HeapMax()
i=0
for job in jobs_list:
R.add(Cell(value=job.head[0], job=i))
i += 1
# S = np.zeros(len(jobs_list)) # momenty rozpoczęcia wykonywania zadań
# C = np.zeros(len(jobs_list)) # momenty zakończenia wykonywania zadań
Nn = list(range(len(jobs_list)))
Ng = []
# order = []
# Algorymt
t = 0
l = 0
Cmax = 0
while len(Nn) > 0 or len(Ng) > 0:
while len(Nn) > 0 and R.min().value <= t:
j = R.min(True).job
Nn.remove(j)
Ng.append(j)
Q.add(Cell(value=jobs_list[j].tail[0], job=j))
if jobs_list[j].tail[0] > jobs_list[l].tail[0]:
jobs_list[l].body[0] = t - jobs_list[j].head[0]
t = jobs_list[j].head[0]
if jobs_list[l].body[0] > 0:
Ng.append(l)
Q.add(Cell(value=jobs_list[l].tail[0], job=l))
if len(Ng) == 0:
t = R.min().value
else:
j = Q.max(True).job
Ng.remove(j)
l = j
t = t + jobs_list[j].body[0]
Cmax = max(Cmax, t + jobs_list[j].tail[0])
return Cmax
def prim(self, inicio=0):
bosque = []
aristas = HeapMin()
origen = self.inicio.obtener_elemento(inicio)
adyac = 0
while (adyac < origen['aristas'].tamanio()):
arista = origen['aristas'].obtener_elemento(adyac)
aristas.arribo([origen['info'], arista['destino']], arista['peso'])
adyac += 1
while (len(bosque) // 2 < self.tamanio() and not aristas.vacio()):
dato = aristas.atencion()
if (len(bosque) == 0) or (
(self.busqueda_prim(bosque, dato[1][0]) is not None) ^
(self.busqueda_prim(bosque, dato[1][1]) is not None)):
bosque.append(dato)
pos_vertice = self.buscar_vertice(dato[1][1])
nuevo_vertice = self.inicio.obtener_elemento(pos_vertice)
adyac = 0
while (adyac < nuevo_vertice['aristas'].tamanio()):
arista = nuevo_vertice['aristas'].obtener_elemento(adyac)
aristas.arribo([nuevo_vertice['info'], arista['destino']],
arista['peso'])
adyac += 1
return bosque
def dijkstra(self, ver_origen, ver_destino):
"""Algoritmo de Dijkstra para hallar el camino mas corto."""
no_visitados = HeapMin()
camino = Pila()
aux = 0
while (aux < self.tamanio()):
vertice = self.inicio.obtener_elemento(ver_origen)
vertice_aux = self.inicio.obtener_elemento(aux)
vertice_aux['anterior'] = None
if (vertice_aux['info'] == vertice['info']):
no_visitados.arribo([vertice_aux['info'], None], 0)
else:
no_visitados.arribo([vertice_aux['info'], None], inf)
aux += 1
while (not no_visitados.vacio()):
dato = no_visitados.atencion()
camino.apilar(dato)
pos_aux = self.buscar_vertice(dato[1][0])
vertice_aux = self.inicio.obtener_elemento(pos_aux)
aristas = 0
while (aristas < vertice_aux['aristas'].tamanio()):
arista = vertice_aux['aristas'].obtener_elemento(aristas)
pos_heap = no_visitados.busqueda(arista['destino'])
if (pos_heap is not None
and no_visitados.elementos[pos_heap][0] >
dato[0] + arista['peso']):
no_visitados.elementos[pos_heap][1][1] = dato[1][0]
nuevo_peso = dato[0] + arista['peso']
no_visitados.cambiar_prioridad(pos_heap, nuevo_peso)
aristas += 1
# print(no_visitados.elementos)
return camino
class Huffman:
__queue, __table = {}, {}
__heap_queue = []
__text, __bintext = '', ''
def __init__(self, filename):
with open(filename, 'r') as f:
for line in f:
for char in line:
if char in self.__queue:
self.__queue[char] += 1
else:
self.__queue[char] = 1
self.__text += line
def printQueue(self):
for char in self.__queue:
print("%c:%d" %(char, self.__queue[char]))
def queueHeap(self):
size = len(self.__queue)+1
first = Node('', -1)
inf = Node('', float("inf"))
self.__heap_queue = HeapMin(first, size, inf)
for char in self.__queue:
try:
self.__heap_queue.insertNode(Node(char, self.__queue[char]))
except CapacityError as e:
print(e.expr.upper() + ":\n" + e.msg + "\n")
sys.exit(0)
def printHeapQueue(self):
self.__heap_queue.printHeap()
def printAllNodes(self):
root = self.__heap_queue.getNode(1)
level = root.height(root)+1
root.printNode(root, level)
def printSequenceNodes(self):
root = self.__heap_queue.getNode(1)
root.printNodeLine(root)
def joinElements(self):
while(self.__heap_queue.getSize() > 2):
left = self.__heap_queue.extractMin()
right = self.__heap_queue.extractMin()
root = Node(left.char+right.char, left.freq+right.freq, left, right)
self.__heap_queue.insertNode(root)
def compress(self):
root = self.__heap_queue.getNode(1)
root.passTree(root)
self.__table = root.getTable()
def extract(self, filename=''):
b, txt = '', ''
inv_table = dict((value, key) for key, value in self.__table.items())
text = self.__bintext
if(filename != ''):
f = open(filename, 'rb')
text = self.__convertStringToBin(f.read().decode('ascii'))
f.close()
for char in text:
b += char
if b in inv_table:
txt += inv_table[b]
b = ''
return txt
def saveFile(self, filename):
f = open(filename, 'w+')
b = ''
for char in self.__text:
b += self.__table[char]
f.write(b)
f.close()
self.__bintext = b
def saveFileBin(self, filename):
f = open(filename, 'wb')
b = ''
for char in self.__text:
b += self.__table[char]
f.write(self.__convertBinToString(b).encode('ascii'))
f.close()
self.__bintext = b
def __convertBinToString(self, b):
start, end = 0, 7
text = ''
while(end < len(b)+7):
temp = b[start:end]
text += chr(int(temp, 2))
start, end = end, end+7
return text
def __convertStringToBin(self, b):
i = 0
text = ''
while(i < len(b)):
temp = b[i]
text += str(bin(ord(temp)))[2:].zfill(7)
i += 1
return text
def printTexts(self):
print(self.__text)
print(self.__bintext)
def printTable(self):
print(self.__table)
def printSizes(self):
sizeOriginalText = len(self.__text)*8
sizeCompressText = len(self.__bintext)
compressRatio = 100-float((sizeCompressText*100)/sizeOriginalText)
print("Tamanho do texto original em bits: %d" %(sizeOriginalText))
print("Tamanho do texto compactado em bits: %d" %(sizeCompressText))
print("Taxa de compactacao: %.2f%%" %compressRatio)
def schrange_nlogn(jobs_list):
'''
Simulate RPQ problem
:param jobs_list:
:param order:
:return:
'''
R = HeapMin()
Q = HeapMax()
i=0
for job in jobs_list:
R.add(Cell(value=job.head[0], job=i))
i += 1
S = np.zeros(len(jobs_list)) # momenty rozpoczęcia wykonywania zadań
C = np.zeros(len(jobs_list)) # momenty zakończenia wykonywania zadań
Nn = list(range(len(jobs_list)))
Ng = []
order = []
# Algorymt
t = R.min().value
while len(Nn) > 0 or len(Ng) > 0:
while len(Nn) > 0 and R.min().value <= t:
j = R.min(True).job
Nn.remove(j)
Ng.append(j)
Q.add(Cell(value=jobs_list[j].tail[0], job=j))
if len(Ng) == 0:
t = R.min().value
else:
j = Q.max(True).job
Ng.remove(j)
order.append(j)
t += jobs_list[j].body[0]
# S czas rozpoczecia zadania
first = True
for i in order:
if first:
S[i] = jobs_list[i].head[0]
i_last = i
first = False
else:
S[i] = max(jobs_list[i].head[0], S[i_last]+jobs_list[i_last].body[0])
i_last = i
# C czas zakonczenia zadania
for i in order:
C[i] = S[i] + jobs_list[i].body[0]
# Obliczenie cmax
cmax = []
for i in order:
cmax.append(C[i]+jobs_list[i].tail[0])
# Najdłuższy czas jako ostatnie zakonczone zadania
cmax = max(cmax)
return order, cmax
