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You don’t need leetcode to know how to invert a binary tree. You need solid foundation on algorithm and data structure, both of which are still relevant today.
by hintymad 5y ago
You don’t need leetcode to know how to invert a binary tree. You need solid foundation on algorithm and data structure, both of which are still relevant today.
- durovo 5y agoI find it funny how inverting a binary tree is used as an example of a bad leetcode problem. This problem seems more like a fizzbuzz test, anyone who knows recursion should be able to solve it on their own.
- mips_avatar 5y agoThere’s a difference between being able to solve the problem given some thought, and being able to answer and program 2-3 of these problems in 45 minutes. The latter is what Facebook expects.
- jacobolus 5y agoNo idea about 'bad', but https://duckduckgo.com/?q=invert+binary+tree https://duckduckgo.com/?q=invert+binary+tree turns up nothing but interview prep sites.
- gifnamething 5y agoBut your slow reasoning and problem solving approach will be compared to another candidate's fast and savvy 'I've memorised this already' approach.