Given a binary tree, print out the whole tree by levels
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1.How to find the nearest parent of any two nodes in a given tree. Tree has mother and father nodes.
What signal is sent by default in the unix kill command
Given a string A and B, find the smallest substring of A that contains all the characters from B. (implement solution in O(n), keep in mind chars in B can repeat)
Implement data structure "Map" storing pairs of integers (key, value) and define following member functions in O(1) runtime: void insert(key, value), void delete(key), int get(key), int getRandomKey().
The wiggle problem, given an array of integers arrange them such that alternate elements are large and small.(2,5,3,6,...)
Find and return the first duplicate integer in an array in O(n) time and O(1) space. Assume there will always be at least one duplicated integer in the array.
efficiently search for an input word in an unbounded dictionary.
What kind of data structure would you use to index annagrams of words? e.g. if there exists the word "top" in the database, the query for "pot" should list that...
You are given a random binary tree 5 / \ 4 9 / \ / \ 3 5 6 8 Write code to print it out in order level ie 5 4 9 3 5 6 8 The tree need not be balanced. Write all the datastructures for the tree and make sure that you print newlines after each level. Also write test cases to test your code.
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