Take a ladder with 5 steps, write a function that gives all the possible combinations of either 1,2, or 3 steps, in any order, to get to the 5th step, and returns the total number of combinations. So some of the possibilities would be [1,1,1,1,1], [1,1,1,2], [1,1,2,1], etc. Then he asked the same question with order not being considered, so [1,1,1,2] and [1,1,2,1] are the same solution.
Give me 5 different ways of finding the median (middle element) of a linked list. For the sake of simplicity, assume the list has odd number of ints. Also mention the runtime for each. Follow up: What's the fastest way you could find the median? What is the runtime? Oh.. and yes, code your answer(s) in any language of your preference.
Write a function to find the maximum sum of sub array where the array can have negative and positive numbers.
In a BST write a program to find 2 nodes x and y such that X+y=k
Find the character with longest repitition in the string e.g. aaacccddddeefffffffg the result should be 'f'.
Given an array of items of three different colors red, green, blue. How would you sort the items in the array so that all the items with a certain color would be grouped together.
The numbers 1-5 are inserted, in order, into a stack. Numbers are removed from the stack one-by-one and pushed into another array (numbers could be removed at any time, even before all the numbers have been added to the stack). What order of numbers in the array could NOT be produced by this scenario? Write code to determine if a sequence of numbers could have been produced by this scenario.
if you have a linked list ordered like : n1-n2-n3-n4-n5-n6-n7-NULL. how to sort it to be at the order : n2-n1-n4-n3-n6-n5-n7-NULL
Print a binary tree level by level in zigzag order
You have a box of red balls, a box of blue balls, and a box of red and blue balls. What is the minimum number of boxes you can open and know what is the contents of each box?
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