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asmhatre
2026-11-06 21:43:33 +05:30
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binary-tree-traversals/output/03-preorder-iterative-steps.txt
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Iterative preorder on the sample tree, step by step
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step | action | stack (bottom..top) | output so far
1 | pop 1, visit, push its children | [3 2] | [1]
2 | pop 2, visit, push its children | [3 5 4] | [1 2]
3 | pop 4, visit, push its children | [3 5] | [1 2 4]
4 | pop 5, visit, push its children | [3 7] | [1 2 4 5]
5 | pop 7, visit, push its children | [3] | [1 2 4 5 7]
6 | pop 3, visit, push its children | [6] | [1 2 4 5 7 3]
7 | pop 6, visit, push its children | [9 8] | [1 2 4 5 7 3 6]
8 | pop 8, visit, push its children | [9] | [1 2 4 5 7 3 6 8]
9 | pop 9, visit, push its children | [] | [1 2 4 5 7 3 6 8 9]