Tree bst and trie
A shop ledger page, 1899. Every line adds up.
DSA Series: Tree, BST and Trie (Blind 75, Java)
14 Blind 75 problems with brute force to optimal approaches, tested Java code, time/space complexity, how interviewers ask and follow-ups. Recursion on trees, BFS levels, BST invariants, serialization, tries.
39 min read