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![[SOLVED!] Binary Tree Postorder Traversal - LeetCode 145 - Java](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FaeEuUg7j0pw%2Fhqdefault.jpg%3Fsqp%3D-oaymwE9COADEI4CSFryq4qpAy8IARUAAAAAGAElAADIQj0AgKJDeAHwAQH4Af4JgALQBYoCDAgAEAEYZSBlKGUwDw%3D%3D%26rs%3DAOn4CLBYUnJ_o7rG4wP5xeg9rIc6VVMWug&w=256&q=75)