Suppose you have 11 marbles and a two-pan balance used to compare the weight of 2 things. All of the marbles weigh the same except for one, which is heavier than all of the others. How would you find the heaviest marble if you are only allowed to weigh the marbles 3 times?
In a BST write a program to find 2 nodes x and y such that X+y=k
Reverse an integer. Looking for optimized solution and definitely no tostring type of solution
1. Reverse string except spaces. A string has mix of alphabets and spaces. Your task is to reverse the string, but preserve the positions of spaces. For example, reverse of " a if" is " f ia" 2. An array of size n has all but one numbers between 1 and n+1. Find the missing one.
Find the character with longest repitition in the string e.g. aaacccddddeefffffffg the result should be 'f'.
Write a function to find the maximum sum of sub array where the array can have negative and positive numbers.
find duplicated item from an array, output the duplicated item with their times
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.
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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