You can useset comprehensionto convert a list to a set in Python. set comprehension is a concise way to create a set. Let’s use set comprehension over the given list to convert it to a set with unique random values. For instance,{item for item in lists}is a set comprehension that c...
treenode.left=self.sortArray2BST(arr[0:mid]) treenode.right=self.sortArray2BST(arr[mid+1:len(arr)])returntreenode 将linked-list转化为array,有别人提出的不转化的办法是通过两个指针,第一个指针每次走一位,第二个指针每次走两位,第二个指针走到最后的时候,第一个指针走到中间位。 可用多个指针(速...
root.left = self.sortedArrayToBST(array[:l //2]) root.right = self.sortedArrayToBST(array[l //2+1])returnrootclassSolution(object):defsortedListToBST(self, head):""" :type head: ListNode :rtype: TreeNode """array = [] tmp = headwhiletmp: array.append(tmp.val) tmp = tmp.nex...
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// Java program to convert a LinkedList // collection to an array import java.util.*; public class Main { public static void main(String[] args) { LinkedList < Integer > list = new LinkedList < Integer > (); list.add(1); list.add(2); list.add(3); list.add(4); list.add(5)...
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编译语言: python3 题目: You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single d... [LeetCode] Convert Binary Search Tree to Sorted Doubly Linked List 将二叉搜索树转为有序双向链表.....
题目来源: https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree/ 题目描述: 代码如下: leetcode -- 109. Convert Sorted List to Binary Search Tree 题目描述题目难度:Medium Given a singly linked list where elements are sorted in ascending order, convert it to a height ba...
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add(new Book(2, "The Debt to Pleasure", "John Lanchester")); Map result1 = bookList.stream() .sorted(Comparator.comparingInt(Book::getId).reversed()) .collect(Collectors.toMap(Book::getId, Book::toString, (oldValue, newValue) -> newValue, LinkedHashMap::new)); System.out.println("...