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Becodewala | Full Stack (MERN) developer | 5k🎯 on Instagram: "Solved LeetCode #145 – Binary Tree Postorder Traversal using an iterative one-stack approach in JavaScript 🚀 Postorder traversal order: Left → Right → Root 🌳 This advanced technique uses one stack + lastVisited pointer to simulate recursion and avoid extra memory. Great for: FAANG & product-based interviews Deep understanding of DFS & tree traversal Optimized space approach vs 2-stack method Mastering iterative tree algorithms Foll
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