Lexicographically Smallest String After Applying Operations, 1628. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Maximum Alternating Subsequence Sum, 1913. res Longest Substring with At Least K Repeating Characters, 421. Add Edges to Make Degrees of All Nodes Even, 2510. Binary Tree Zigzag Level Order Traversal - LeetCode Daily LeetCoding Challenge February, Day 19 LeetCode Feb 19, 2023 2 6.1K 23 BFS Level Order Traversal C++ Heisenberg2003 Feb 19, 2023 C++ 4 7.6K 0 [Python] BFS; explained wangw1025 Feb 19, 2023 Python3 Breadth-First Search 2 2.1K 0 Python-Alternate BFS Beats 99%- Easily understandable code Populating Next Right Pointers in Each Node II, 153. Longest Non-decreasing Subarray From Two Arrays, 2772. Friend Requests I: Overall Acceptance Rate, 600. Count the Number of Consistent Strings, 1685. Check if All the Integers in a Range Are Covered, 1894. . Find Nearest Right Node in Binary Tree, 1604. k==1 level==1 Add 5 incorrectly to level 1. res[level] Maximum Running Time of N Computers, 2142. Replace Employee ID With The Unique Identifier, 1379. Add Two Polynomials Represented as Linked Lists, 1637. Find Score of an Array After Marking All Elements, 2598. Make Number of Distinct Characters Equal, 2535. Construct Binary Search Tree from Preorder Traversal, 1010. Find Resultant Array After Removing Anagrams, 2274. Maximum Cost of Trip With K Highways, 2249. Find Minimum in Rotated Sorted Array, 154. Longest Arithmetic Subsequence of Given Difference, 1227. Binary Tree Zigzag Level Order Traversal LeetCode Solution - TutorialCup Count Subarrays With Score Less Than K, 2307. Align \vdots at the center of an `aligned` environment. Minimum Hours of Training to Win a Competition, 2385. Construct Binary Tree from Preorder and Inorder Traversal, 106. Minimum Moves to Reach Target with Rotations, 1213. Find the Kth Smallest Sum of a Matrix With Sorted Rows, 1441. Minimum Operations to Make Array Equal, 1553. Why is {ni} used instead of {wo} in ~{ni}[]{ataru}? Smallest Subarrays With Maximum Bitwise OR, 2412. Apply Bitwise Operations to Make Strings Equal, 2550. Find Kth Largest XOR Coordinate Value, 1741. Maximum Font to Fit a Sentence in a Screen, 1619. Start from the root node. second stack for printing from right to left. Airplane Seat Assignment Probability, 1228. Maximum Number of Words You Can Type, 1939. Maximum Score After Splitting a String, 1423. Customers with Maximum Number of Transactions on Consecutive Days, 2753. Intuition: Considering the fact that we need to print the nodes, level by level, our first guess would definitely be that it must be related to level order traversal. Maximum Fruits Harvested After at Most K Steps, 2107. Minimum Time to Remove All Cars Containing Illegal Goods, 2168. Maximum Beauty of an Array After Applying Operation, 2781. Max Dot Product of Two Subsequences, 1460. Number of Ways to Reorder Array to Get Same BST, 1574. Palindrome Number 10. Number of Ways to Reach a Position After Exactly k Steps, 2406. Maximum Value of K Coins From Piles, 2220. Minimum Difference in Sums After Removal of Elements, 2164. Divide Intervals Into Minimum Number of Groups, 2410. Find the Quiet Students in All Exams, 1413. Pop a node from the current stack, print its value. Online Majority Element In Subarray, 1160. Find the Divisibility Array of a String, 2576. Average Value of Even Numbers That Are Divisible by Three, 2457. Kth Smallest Element in a Sorted Matrix, 381. Assume the two stacks are current: currentlevel and nextlevel. Equal Sum Arrays With Minimum Number of Operations, 1779. Java Solution - Binary Tree Zigzag Level Order Traversal [Leetcode Coordinate With Maximum Network Quality, 1621. Special Array With X Elements Greater Than or Equal X, 1611. I believe the simplest of them all without any variable just two stacks. Minimum Flips to Make a OR b Equal to c, 1319. Space Complexity: There are two stacks present in the program; each stack takes the space complexity of O(n), where n is the total number of nodes present in the binary tree. Count Number of Rectangles Containing Each Point, 2259. Insert into a Sorted Circular Linked List, 712. Maximum Distance Between a Pair of Values, 1857. Medium, Asked in: Minimum Cost to Separate Sentence Into Rows, 2056. Maximum Enemy Forts That Can Be Captured, 2515. Divide Players Into Teams of Equal Skill, 2492. Number of Accounts That Did Not Stream, 2023. Check if Word Equals Summation of Two Words, 1883. Minimum Number of Operations to Make All Array Elements Equal to 1, 2656. Find the Longest Substring Containing Vowels in Even Counts, 1372. Minimum Moves to Equal Array Elements, 462. What mathematical topics are important for succeeding in an undergrad PDE course? Detect Pattern of Length M Repeated K or More Times, 1567. Count Ways to Build Rooms in an Ant Colony, 1921. Check if Numbers Are Ascending in a Sentence, 2044. Removing Minimum Number of Magic Beans, 2174. The Users That Are Eligible for Discount, 2231. 2. Maximum Absolute Sum of Any Subarray, 1750. Random Point in Non-overlapping Rectangles, 524. Smallest Missing Genetic Value in Each Subtree, 2004. Number of Times a Driver Was a Passenger, 2240. Find Substring With Given Hash Value, 2158. Expected Time Complexity: O (N). Smallest Rectangle Enclosing Black Pixels, 309. Apply Operations to Make All Array Elements Equal to Zero, 2776. Find Minimum in Rotated Sorted Array II, 158. Are self-signed SSL certificates still allowed in 2023 for an intranet server running IIS? Minimum Total Cost to Make Arrays Unequal, 2503. Count the Number of Square-Free Subsets, 2575. Maximum Number of Integers to Choose From a Range I, 2556. I just took a variable p.if the variable is equal to 1 than print the order at a given level left to right , if it is -1 print right to left. Intersection of Three Sorted Arrays, 1217. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 20 9 Number of Students Doing Homework at a Given Time, 1452. Check if a Parentheses String Can Be Valid, 2117. Problem Statement: Given the root of a binary tree, return the zigzag level order traversal of Binary Tree. The array elements in the resultant array must be such that arr[0] >= arr[1] <= arr[2] >= arr[3] <= arr[4] and so on. Binary Tree Zigzag Level Order Traversal,#CodingInterview #LeetCode #JulyLeetCodingChallenge #Google #Amazon #BinaryTree #Zigzag Concatenate the Name and the Profession, 2507. Partition Array Such That Maximum Difference Is K, 2300. The Category of Each Member in the Store, 2052. Number of Burgers with No Waste of Ingredients, 1277. Iterative Post Order Binary tree Traversal, Flatten Binary Tree in Level Order Traversal. Not the answer you're looking for? This problem is another common coding question asked in interviews. Number of Subarrays with Bounded Maximum, 798. Another Approach: In this approach, use a deque to solve the problem. k==0 level==2 You add 6 correctly to level 2. Minimum Obstacle Removal to Reach Corner, 2292. Duration: 1 week to 2 week. Remove Duplicates from Sorted List II, 105. Count Square Submatrices with All Ones, 1279. When traversing from the direction right to left, we pop the node from the stack that was being stored in the last step. Minimum Number of Taps to Open to Water a Garden, 1327. Maximum Non Negative Product in a Matrix, 1595. Find The Original Array of Prefix Xor, 2434. Space complexity: For a skewed tree space complexity will be O(n) and for a Balanced tree, the call stack uses O(log n) space, (i.e., the height of the balanced tree). Employees Whose Manager Left the Company, 1979. If we closely examine, for even levels we need to go from left to right while for odd levels we need to go from right to left. Construct Binary Tree from Inorder and Postorder Traversal, 107. To learn more, see our tips on writing great answers. acknowledge that you have read and understood our. Subtract the Product and Sum of Digits of an Integer, 1282. Distance to a Cycle in Undirected Graph, 2205. Convert Sorted List to Binary Search Tree, 116. To reduce the time complexity of shifting, we can use an array of a doubly linked list and before returning, convert all the doubly linked lists into an array. Swap For Longest Repeated Character Substring, 1157. Minimum Add to Make Parentheses Valid, 945. While traversing the odd level push left child then right, and while traversing even level traverse right child then left. Delete Characters to Make Fancy String, 1959. Minimum Number of Work Sessions to Finish the Tasks, 1989. Maximum XOR of Two Numbers in an Array, 423. Disconnect Path in a Binary Matrix by at Most One Flip, 2557. All Paths from Source Lead to Destination, 1061. I can't figure out my mistake. Minimum Lines to Represent a Line Chart, 2282. Minimum Score After Removals on a Tree, 2323. If it's even Insert into the end of the list with index = level Number of Steps to Reduce a Number to Zero, 1343. Find the Losers of the Circular Game, 2685. res[level] Design a Stack With Increment Operation, 1385. Minimum Insertion Steps to Make a String Palindrome, 1315. Examples: The k-th Lexicographical String of All Happy Strings of Length n, 1418. Return. Push and pop in different ways depending on if the level is odd or level is even. Note that the optimization of this approach is the approach where we used deque. Note that the value of the variable changes after the completion of the traversal of each level. Not the answer you're looking for? Number of Adjacent Elements With the Same Color, 2673. Find the Longest Valid Obstacle Course at Each Position, 1966. Maximum Good People Based on Statements, 2152. Longest Palindromic Substring 6. Minimum Interval to Include Each Query, 1855. Maximum Number of Non-Overlapping Subarrays With Sum Equals Target, 1549. Minimum Moves to Make Array Complementary, 1676. A BFS solution could be the right path. Contribute to the GeeksforGeeks community and help create better learning resources for all. Your task is to complete the function zigZagTraversal () which takes the root node of the Binary Tree as its input and returns a list containing the node values as they appear in the Zig-Zag Level-Order Traversal of the Tree. The Employee That Worked on the Longest Task, 2433. Execute Cancellable Function With Delay, 2721. Maximum Number of Achievable Transfer Requests, 1602. Longest Common Subsequence Between Sorted Arrays, 1941. Check Distances Between Same Letters, 2400. Group the People Given the Group Size They Belong To, 1283. Split Array into Consecutive Subsequences, 668. Distribute Money to Maximum Children, 2593. Insert the nodes encountered during traversal into a vector(the dynamic array corresponding to the level of that node). But in this case, we can also maintain a flag variable which keeps track of alternate level to reverse the order of the corresponding level traversal.flag==true implies we have to insert from left to right and flag==false means we have to insert element from right to left our answer arraylist. Concatenation of Consecutive Binary Numbers, 1684. Find the Minimum Number of Fibonacci Numbers Whose Sum Is K, 1415. Restore the Array From Adjacent Pairs. Remove Zero Sum Consecutive Nodes from Linked List, 1178. Check If All 1's Are at Least Length K Places Away, 1438. And recurse left again. Minimum Money Required Before Transactions, 2414. Count Unique Characters of All Substrings of a Given String, 862. Minimum Operations to Reduce an Integer to 0, 2572. Given the root node of the tree and you have to print the value of the level of the node by level. level Given a binary tree, return the zigzag level order traversal of the nodes' values of the given tree. Longest Substring Without Repeating Characters, 17. It is naturally suited to these level-by-level styled problems. Largest Submatrix With Rearrangements, 1731. Number of Longest Increasing Subsequence, 674. Maximum Trailing Zeros in a Cornered Path, 2246. Introduction to Algorithms - CLR - Cormen, Leiserson, Rivest: https://amzn.to/2Wdp8rZ*****************************************************************************July LeetCoding Challenge | Problem 22 | Binary Tree Zigzag Level Order Traversal | 22 July,Facebook Coding Interview question,google coding interview question,leetcode,Binary Tree Zigzag Level Order Traversal,Binary Tree Zigzag Level Order Traversal c++,Binary Tree Zigzag Level Order Traversal Java,Binary Tree Zigzag Level Order Traversal python,Binary Tree Zigzag Level Order Traversal solution,103. Find Minimum Time to Finish All Jobs, 1724. We pop from the currentlevel stack and print the nodes value. Call recursively DFS function that adds current node value to the output by level. Check if There is a Valid Partition For The Array, 2372. Smallest Value After Replacing With Sum of Prime Factors, 2508. If a particular level (as key-value) is not present in the map, insert that level (as key) into the map and map it to an empty dynamic. Determine the Winner of a Bowling Game, 2661.
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