Given a string (understood to be a sentence), reverse the order of the words. "Hello world" becomes "world Hello"
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find common ancestor in binary tree
Find exist in maze or prove its non existence.
Phone interview question: In C, why is it considered bad form for a function to return a pointer to a stack-allocated variable? What happens if you do it anyway?
Given an array of integers and no memory limit, provide an algorithm to sort the array with time complexity of O(n).
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.
1) Implement atoi 2) correct bug in the code that deletes head from linked list 3) Given string of digits like "72388" and int n, delete n characters from the sting such the resulting string contains minimal number representation, you must preserve relative position of digits. Example: if st="72388" and n=2, the answer is 238.
Why is the beach light red? lighthouse
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