algorithm-in-python/codes/dataStructure/leftHeap.py

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2018-07-08 23:28:29 +08:00
''' mbinary
#########################################################################
# File : leftHeap.py
# Author: mbinary
# Mail: zhuheqin1@gmail.com
# Blog: https://mbinary.coding.me
# Github: https://github.com/mbinary
# Created Time: 2018-05-19 23:06
# Description:
#########################################################################
'''
from functools import total_ordering
@total_ordering
class node:
def __init__(self,val,freq=1,s=1,left=None,right=None):
self.val=val
self.freq=freq
self.s=s
if left is None or right is None:
self.left = left if left is not None else right
self.right =None
else:
if left.s<right.s:
left,right =right, left
self.left=left
self.right=right
self.s+=self.right.s
def __eq__(self,nd):
return self.val==nd.val
def __lt__(self,nd):
return self.val<nd.val
def __repr__(self):
return 'node(val=%d,freq=%d,s=%d)'%(self.val,self.freq,self.s)
class leftHeap:
def __init__(self,root=None):
self.root=root
def __bool__(self):
return self.root is not None
@staticmethod
def _merge(root,t): #-> int
if root is None:return t
if t is None:return root
if root<t:
root,t=t,root
root.right = leftHeap._merge(root.right,t)
if root.left is None or root.right is None:
root.s=1
if root.left is None:
root.left,root.right = root.right,None
else:
if root.left.s<root.right.s:
root.left,root.right = root.right,root.left
root.s = root.right.s+1
return root
def insert(self,nd):
if not isinstance(nd,node):nd = node(nd)
if self.root is None:
self.root=nd
return
if self.root==nd:
self.root.freq+=1
return
prt =self. _findPrt(self.root,nd,None)
if prt is None:
self.root=leftHeap._merge(self.root,nd)
else :
if prt.left==nd:
prt.left.freq+=1
else:prt.right.freq+=1
def remove(self,nd):
if not isinstance(nd,node):nd = node(nd)
if self.root==nd:
self.root=leftHeap._merge(self.root.left,self.root.right)
else:
prt = self._findPrt(self.root,nd,None)
if prt is not None:
if prt.left==nd:
prt.left=leftHeap._merge(prt.left.left,prt.left.right)
else:
prt.right=leftHeap._merge(prt.right.left,prt.right.right)
def find(self,nd):
if not isinstance(nd,node):nd = node(nd)
prt = self._findPrt(self.root,nd,self.root)
if prt is None or prt==nd:return prt
elif prt.left==nd:return prt.left
else:return prt.right
def _findPrt(self,root,nd,parent):
if not isinstance(nd,node):nd = node(nd)
if root is None or root<nd:return None
if root==nd:return parent
l=self._findPrt(root.left,nd,root)
return l if l is not None else self._findPrt(root.right,nd,root)
def getTop(self):
return self.root
def pop(self):
nd = self.root
self.remove(self.root.val)
return nd
def levelTraverse(self):
li = [(self.root,0)]
cur=0
while li:
nd,lv = li.pop(0)
if cur<lv:
cur=lv
print()
print(nd,end=' ')
else:print(nd,end=' ')
if nd.left is not None:li.append((nd.left,lv+1))
if nd.right is not None:li.append((nd.right,lv+1))
if __name__ == '__main__':
lh = leftHeap()
data = [(i-3)**2 for i in range(20)]
for i in data:
lh . insert(i)
lh.levelTraverse()
print()
for i in data:
print(lh.getTop())
if lh.find(i) is not None:lh.remove(i)
'''
data = [(i-10)**2 for i in range(20)]
node(100,freq=1,s=3)
node(81,freq=2,s=3) node(64,freq=2,s=2)
node(16,freq=2,s=2) node(25,freq=2,s=2) node(49,freq=2,s=1) node(36,freq=2,s=1)
node(9,freq=2,s=1) node(4,freq=2,s=1) node(1,freq=2,s=1) node(0,freq=1,s=1)
node(100,freq=1,s=3)
node(81,freq=2,s=3)
node(64,freq=2,s=2)
node(49,freq=2,s=1)
node(36,freq=2,s=3)
node(25,freq=2,s=2)
node(16,freq=2,s=2)
node(9,freq=2,s=1)
node(4,freq=2,s=2)
node(1,freq=2,s=1)
node(0,freq=1,s=1)
None
None
None
None
None
None
None
None
None
'''
'''
data = [(i-3)**2 for i in range(20)]
node(256,freq=1,s=1)
node(225,freq=1,s=1)
node(196,freq=1,s=1)
node(169,freq=1,s=1)
node(144,freq=1,s=1)
node(121,freq=1,s=1)
node(100,freq=1,s=1)
node(81,freq=1,s=1)
node(64,freq=1,s=1)
node(49,freq=1,s=1)
node(36,freq=1,s=1)
node(25,freq=1,s=1)
node(16,freq=1,s=1)
node(9,freq=2,s=2)
node(4,freq=2,s=1) node(1,freq=2,s=1)
node(0,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
node(256,freq=1,s=1)
'''