{ "data": { "question": { "questionId": "764", "questionFrontendId": "429", "boundTopicId": null, "title": "N-ary Tree Level Order Traversal", "titleSlug": "n-ary-tree-level-order-traversal", "content": "

Given an n-ary tree, return the level order traversal of its nodes' values.

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Nary-Tree input serialization is represented in their level order traversal, each group of children is separated by the null value (See examples).

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Example 1:

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\nInput: root = [1,null,3,2,4,null,5,6]\nOutput: [[1],[3,2,4],[5,6]]\n
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Example 2:

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\"\"

\n\n
\nInput: root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]\nOutput: [[1],[2,3,4,5],[6,7,8,9,10],[11,12,13],[14]]\n
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Constraints:

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Compiled with clang 11 using the latest C++ 17 standard.

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Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

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Most standard library headers are already included automatically for your convenience.

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OpenJDK 17 . Java 8 features such as lambda expressions and stream API can be used.

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Most standard library headers are already included automatically for your convenience.

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Includes Pair class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.

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Python 2.7.12.

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Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.

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For Map/TreeMap data structure, you may use sortedcontainers library.

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Compiled with gcc 8.2 using the gnu99 standard.

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Your code is compiled with level one optimization (-O1). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

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C# 10 with .NET 6 runtime

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Your code is compiled with debug flag enabled (/debug).

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Your code is run with --harmony flag, enabling new ES6 features.

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For Priority Queue / Queue data structures, you may use datastructures-js/priority-queue and datastructures-js/queue.

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Ruby 3.1

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