def __init__(self):
'''pre: None
post: Construct the empty ordered Set
'''
self.set = DLList()
def __init__(self):
'''pre: None
post: Construct the empty ordered Set
'''
self.set = DLList()
class OrderedSet(object):
'''The OrderedSet is an ordered collection of unique elements. with following operations
Construction/Insertion/str/len/in/getset/remove/removeFirst
'''
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __init__(self):
'''pre: None
post: Construct the empty ordered Set
'''
self.set = DLList()
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def insert(self, x):
'''pre: X is of the same type as the objects in OrderedSet
post: X is inserted into OrderedSet (to the right position)
'''
#if x is already in the set
#remove the existing one
#insert x to the right position
if x in self:
self.remove(x)
self.insert(x)
return
#if x not in the set
#insert x to the right position
index = len(self.set)
for i in range(len(self.set) - 1, -1, -1):
if x <= self.set[i]:
index = i
if index == len(self.set):
self.set.insert(index, x)
return
if self.set[index] == x:
self.set.insert(index + 1, x)
return
self.set.insert(index, x)
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __str__(self):
'''
pre:NOne
Post: return a string representation of the orderedset
'''
#retur [] if the set is empty
if len(self.set) == 0:
return '[]'
#generate the correct string representation for non-empty set
s = '['
s = s + str(self.set[0]) + '*'
for i in range(1, len(self.set)):
s = s + ', ' + str(self.set[i])
s = s + ']'
return s
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __contains__(self, x):
'''pre: None
post: 1. return True if x is inside the orderedset
2. return False otherwise
'''
#Check whether i
for i in self.set:
if i is x:
return True
return False
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def remove(self, x):
'''pre:element x is in the list
post:elemnt x is removed from the list
exception: IndexError if x is not in the list in the frist place
'''
#go into the set to check whether x is in the set
#if it is, remove item x
for i in self.set:
if i is x:
print(i)
self.set.remove(i)
return
#raise IndexError if not found
raise IndexError
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def removeFirst(self):
'''
pre:NOne
post:1.removes and return the first element from the ordered set
2. return None if the ordered set is empty
'''
#return None if the set is empty
print(len(self))
if len(self) == 0:
return None
#pop the first item if not empty
return self.set.pop(0)
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __len__(self):
'''
pre: None
post:return the length of the ordered set
'''
return len(self.set)
def __init__(self):
SLLQueue.__init__(self)
self.deque = DLList()
class MaxQueue(SLLQueue):
def __init__(self):
SLLQueue.__init__(self)
self.deque = DLList()
def add(self, x: np.object):
super().add(x)
if self.deque.size() == 0:
self.deque.add(0, x)
else:
while self.deque.size() != 0 and self.deque.dummy.next.x < x:
self.deque.remove(self.deque.n - 1)
self.deque.add(self.deque.n, x)
def remove(self) -> np.object:
if self.n == 0: return None
if self.head.x == self.deque.dummy.prev.x:
self.deque.remove(0)
return super().remove()
def max(self) -> np.object:
if self.deque.size() == 0:
return None
return self.deque.dummy.prev.x
class OrderedSet(object):
'''The OrderedSet is an ordered collection of unique elements. with following operations
Construction/Insertion/str/len/in/getset/remove/removeFirst
'''
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __init__(self):
'''pre: None
post: Construct the empty ordered Set
'''
self.set = DLList()
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def insert(self,x):
'''pre: X is of the same type as the objects in OrderedSet
post: X is inserted into OrderedSet (to the right position)
'''
#if x is already in the set
#remove the existing one
#insert x to the right position
if x in self:
self.remove(x)
self.insert(x)
return
#if x not in the set
#insert x to the right position
index = len(self.set)
for i in range(len(self.set)-1,-1,-1):
if x <= self.set[i]:
index = i
if index == len(self.set):
self.set.insert(index,x)
return
if self.set[index] == x:
self.set.insert(index+1,x)
return
self.set.insert(index,x)
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __str__(self):
'''
pre:NOne
Post: return a string representation of the orderedset
'''
#retur [] if the set is empty
if len(self.set) == 0:
return '[]'
#generate the correct string representation for non-empty set
s = '['
s = s + str(self.set[0])+'*'
for i in range (1,len(self.set)):
s = s + ', ' + str(self.set[i])
s = s + ']'
return s
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __contains__(self,x):
'''pre: None
post: 1. return True if x is inside the orderedset
2. return False otherwise
'''
#Check whether i
for i in self.set:
if i is x:
return True
return False
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def remove(self,x):
'''pre:element x is in the list
post:elemnt x is removed from the list
exception: IndexError if x is not in the list in the frist place
'''
#go into the set to check whether x is in the set
#if it is, remove item x
for i in self.set:
if i is x:
print(i)
self.set.remove(i)
return
#raise IndexError if not found
raise IndexError
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def removeFirst(self):
'''
pre:NOne
post:1.removes and return the first element from the ordered set
2. return None if the ordered set is empty
'''
#return None if the set is empty
print(len(self))
if len(self)==0:
return None
#pop the first item if not empty
return self.set.pop(0)
#---------------------------------------------------------------------------------
#---------------------------------------------------------------------------------
def __len__(self):
'''
pre: None
post:return the length of the ordered set
'''
return len(self.set)
