Implement a power function similar to pow() function of c.
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You're given a binary tree and pointers to two nodes in the tree. Describe the fastest algorithm you can come up with to determine the closest common ancestor.
Write code that sorts a stack
Given a array of numbers, output the array like this: a1 <= a2 >= a3 <= a4 >= a5...
Given an array of numbers [1,3,3,5,9,4,1,10,9,7,2,7], Write a php function that will print numbers that are not duplicated in array. [5,4,10,2]
Find the number f set bits in an integer
Given two large files with 64-bit integers produce file with integers which are present in both files and estimate O(?) complexity of your algorithm.
Input is a 4x4 table with letters. One starts from any of the 16 elements and can move in one step to any of the 8 neighboring cells not visited before (up, down, left, right, up-left, etc, no hyperspace jumps between rows 1 & 4, columns 1 & 4). Every time step is made letter in that cell is added so a word is built as we walk. These generated words are looked up in external dictionary (function to look up in the dictionary is provided, I did not understand significance of this dictionary well) and the goal of the exercise is to output all words generated by all possible table walks and which are contained in the dictionary.
Phone Interview: i) Find the number of inversions in an array (describe & code) ii) Find collinear points in a given set of 2D points (describe & code)
Why are manhole covers round?
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