Write a function to determine if a binary tree is balanced or not.
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finad all plaindromes ina string.
Pick out k random elements from a very long linked list
implement sqrt
You have an image and you have to find the average of the image i.e. average of all the pixels into one pixel. The pixel has 3 values, R, G and B. Each R, G and B is a 8 bit number. Write the code for it in C.
Given an array of a 999,999 numbers, from 1 to a 1,000,000, there's one number missing. The array is not sorted, and you can only access the array using a function getNumber(), which pops one number from the array. Each number in the array can only be accessed once. There's one number missing, from 1 to 1 million. which number is this?
How would you call fire brigade if your office catches fire? Consider you dont have internet, telephone, or any means of communication.
Given an array of integers and no memory limit, provide an algorithm to sort the array with time complexity of O(n).
Why is the beach light red? lighthouse
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