Depth-First Search

The implementation of this algorithm is done using recursion with the LIFO stack data structure and it creates the same nodes as our first method but in a different order. The space requirement is quite linear since nodes on a single path are stored in each iteration from root-to-leaf node.

The disadvantage of the algorithm is that there's a possibility that this algorithm may not terminate and go on infinitely on one path and in some cases the execution time increases. It can't check for duplicate nodes.

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