Generate all permutations of a string and determine if each is in the dictionary. Find an efficient data structure for the dictionary.
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Data structures and algorithms, with a bit of design and some soft questions about your goals and background.
If a sorted array is rotated, how to find how many times it has been rotated.
Determine whether a given binary tree is fully populated, where "fully populated" means that every internal node has exactly two children, and all terminal nodes are at the same depth.
Clone a linked list that has a cycle (do not fix the cycle). Is there a way to uniquely identify a node without relying on a hash code?
How would you test a vending machines? Write some test cases.
Different Sorting Algorithms and Big O of each
implement atoi
Graph Coloring problem: given a connected graph, color each node in the graph such that no two adjacent nodes have the same color.
given binary tree inorder & preorder traversal, return postorder traversal
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