- Topic: Data Structures
- Show how to implement a stack using two queues. Analyze the running time of the stack operations.
- Demonstrate what happens when we insert the keys 5, 28, 19, 15, 20, 33, 12, 17, 10 into a hash table with collisions resolved by chaining. Let the table have 9 slots, and let the hash function be h(k) = k mod
- Consider a binary search tree T whose keys are distinct. Show that if the right subtree of a node x in T is empty and x has a successor y , then y is the lowest ancestor of x whose left child is also an ancestor of x .
- Describe a non-recursive algorithm for enumerating all permutations of the numbers {1, 2, ,n} using an explicit stack.
- Show that any n-node binary tree can be converted to any other n -node binary tree using O(n)

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