python 97% without hashmap. BFS to find target, recursion to add k-distance nodes. - All Nodes Distance K in Binary Tree - LeetCode

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C++CJavaPythonPython3JavaScriptGoSwiftKotlinC#RustRubyScalaTypeScriptMySQLBreadth-First SearchDepth-First SearchRecursionBinary TreeGraphTreeQueueOrdered SetHash TableBacktrackingBinary Search TreeStackOrdered MapIteratorArrayMathMemoizationHash FunctionShortest Path