1
Q
Binary Tree Zigzag Level Order Traversal
Given a binary tree, return the zigzag level order traversal of its nodes’ values. (ie, from left to right, then right to left for the next level and alternate between).
A
Medium
flashcards
Decks in class (93)
# Cards
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Longest Substring Without Repeating Characters1
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Container With Most Water1
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Longest Palindromic Substring1
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Add Two Numbers1
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Sort List1
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Product of Array Except Self1
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3Sum1
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Odd Even Linked List1
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Word Break1
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Pow(x, n)1
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Letter Combinations of a Phone Number1
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Number of Islands1
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Copy List with Random Pointer1
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Generate Parentheses1
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Group Anagrams1
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Maximum Product Subarray1
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Evaluate Reverse Polish Notation1
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Shuffle an Array1
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Rotate Image1
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String to Integer (atoi)1
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Largest Number1
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Merge Intervals1
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Search in Rotated Sorted Array1
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Valid Sudoku1
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Permutations1
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Find the Duplicate Number*1
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Word Search1
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Spiral Matrix1
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Top K Frequent Elements1
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Game of Life1
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Divide Two Integers1
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Search a 2D Matrix II1
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Perfect Squares1
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Remove Nth Node From End of List1
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Set Matrix Zeroes1
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Find Peak Element1
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Gas Station1
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Word Ladder1
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Lowest Common Ancestor of a Binary Tree1
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Populating Next Right Pointers in Each Node1
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Unique Paths1
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Kth Largest Element in an Array1
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Binary Tree Level Order Traversal1
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Jump Game1
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Construct Binary Tree from Preorder and Inorder Traversal1
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Subsets1
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Subsets II1
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Fraction to Recurring Decimal1
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Sort Colors1
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Longest Substring with At Least K Repeating Characters1
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Decode Ways1
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Increasing Triplet Subsequence1
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Implement Trie (Prefix Tree)1
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Flatten 2D Vector1
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Binary Tree Inorder Traversal1
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Kth Smallest Element in a Sorted Matrix1
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Find the Celebrity1
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Insert Delete GetRandom O(1)1
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Validate Binary Search Tree1
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Flatten 2D Vector1
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Surrounded Regions1
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Course Schedule1
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Meeting Rooms II1
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Basic Calculator II1
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Palindrome Partitioning1
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Search for a Range1
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Kth Smallest Element in a BST1
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Wiggle Sort II1
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Binary Tree Zigzag Level Order Traversal1
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Inorder Successor in BST1
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Missing Ranges1
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4Sum II1
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Design Tic-Tac-Toe1
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Course Schedule II1
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Best Time to Buy and Sell Stock with Cooldown1
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Combination Sum1
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Combination Sum IV1
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Combination Sum III1
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Counting Bits1
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114. Flatten Binary Tree to Linked List1
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Friend Circles1
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Linked List Cycle II1
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Maximal Square1
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Partition Equal Subset Sum1
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Queue Reconstruction by Height1
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Single Element in a Sorted Array1
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Subarray Sum Equals K1
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Target Sum1
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Minimum Height Trees1
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Unique Binary Search Trees1
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House Robber II1
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House Robber III1
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Decode String1
