Hello , can u provide some resources to learn Trees and Graphs from scratch like some playlist or course and it should on a good level ( by that I mean I get problem solving as well not just the concepts ) it would be very helpful if u can provide some ..Thannks
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Usaco Guide is pretty good e.g. introduction, and in silver section there's more stuff on traversal & intro to trees, and in gold there's some harder stuff.
It also has some good practice problems