binary-search

问题 Does python provide functions for performing binary search on sorted lists, analogous to the std::lower_bound and std::upper_bound algorithms of the C++ Standard Library? 回答1: Those functions are located in the bisect module: bisect. bisect_left ( a , x , lo=0 , hi=len(a) ) is the analog of std::lower_bound() . bisect. bisect_right ( a , x , lo=0 , hi=len(a) ) is the analog of std::upper_bound() . Note: there is also a function bisect () which is an alias for bisect_right (). 来源： https:/

问题 So I'm trying to delete a node from a tree by using these two functions inside the class.Unfortunately it just doesnt delete anything and i was wondering what is wrong about it! any help would be truly appreciated. def Find_Min(self,node): current=node while current.left is None: current=current.left return current def deletenode(self,node,ntbd): ##ntbd:node to be deleted /// node: root node if node is None: return None elif node.data>ntbd: node.left=self.deletenode(node.left,ntbd) elif node

问题 So I'm trying to delete a node from a tree by using these two functions inside the class.Unfortunately it just doesnt delete anything and i was wondering what is wrong about it! any help would be truly appreciated. def Find_Min(self,node): current=node while current.left is None: current=current.left return current def deletenode(self,node,ntbd): ##ntbd:node to be deleted /// node: root node if node is None: return None elif node.data>ntbd: node.left=self.deletenode(node.left,ntbd) elif node

问题 I need a binary search function. I couldn't find any function in the standard library that will return the index of the found item, and if it wasn't found, will return the bitwise complement of the index of the next element that is larger than the item I looked for. What is the function I am looking for? Edit: I need to insert an item to a sorted vector and to keep it sorted. That's why I need to bitwise complement index. 回答1: I'm quite certain the standard library doesn't include anything to

问题 I need a binary search function. I couldn't find any function in the standard library that will return the index of the found item, and if it wasn't found, will return the bitwise complement of the index of the next element that is larger than the item I looked for. What is the function I am looking for? Edit: I need to insert an item to a sorted vector and to keep it sorted. That's why I need to bitwise complement index. 回答1: I'm quite certain the standard library doesn't include anything to

问题 I am a novice in assembly language programming I searched for binary search program and found this and I tried understand the program. It's working fine but I couldn't understand the success part of the code: what is ADD al,'0' and what is mov res,al ? .model small .stack 100h .data ARR DW 1000H,2000H,3000H,4000H,5000H,6000H LEN DW ($-ARR)/2 KEY EQU 2000H SUC DB "KEY IS FOUND AT$" FAILURE DB "KEY IS NOT FOUND$" RES DB "POSITION",13,10,"$" .CODE START: MOV AX,@data MOV DS,AX MOV BX,00 ;LOW MOV

问题 I am a novice in assembly language programming I searched for binary search program and found this and I tried understand the program. It's working fine but I couldn't understand the success part of the code: what is ADD al,'0' and what is mov res,al ? .model small .stack 100h .data ARR DW 1000H,2000H,3000H,4000H,5000H,6000H LEN DW ($-ARR)/2 KEY EQU 2000H SUC DB "KEY IS FOUND AT$" FAILURE DB "KEY IS NOT FOUND$" RES DB "POSITION",13,10,"$" .CODE START: MOV AX,@data MOV DS,AX MOV BX,00 ;LOW MOV

问题 I understand that binary search is O(logn) for a sorted array. However, I want to know if it is possible to calculate the average runtime with the guarantee that the search value is in the sorted array. This guarantee gives the binary search a much greater probability of finding the search value in less than logn time. i.e. there is a 1/n chance of finding it in 1 step, 2/n chance of finding it in the 2nd step and so on. I'm not sure how to go from this intuition into calculating the average

问题 I have a problem about getting the result of Binary Search Algorithm as getting missing values. The program wants you to enter city name and shows the results of entering city names aftering reading each line in file and assigning each variable to City Object. But there is a problem in the result part. There are 3 city names called "Moscow" in the list and it shows 2 results after entering city name "Moscow". How can I fix the issue. I also shared my code snippets as shown below. Here is my

问题 I have a problem about implementing binary search in substring. In my City object, there is a cityName variable as defined String. I want to enter any substring like "Sha" and it shows the result of "Sha". Except for this, there is a weight variable to sort descend city names. For example, the bigger weight value is at the top and the sort process is based on descending. How can I do that? How can I add this to the comparater area? Here is my City Object public class City implements