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Find next greater number with same set of digits

July 20, 2014 by Dhaval Dave

Given a number n, find the smallest number that has same set of digits as n and is greater than n. If x is the greatest possible number with its set of digits, then print
… Read More

Filed Under: Amazon Interview Question, Interview Questions, problem Tagged With: algorithm, Mathematical

Find the kth number with prime factors 3, 5 and 7

July 17, 2014 by Dhaval Dave

Find the kth number with prime factors 3, 5 and 7

Design an algorithm such that we have to find the k th element in the array such that their only prime factors are 3,5

… Read More

Filed Under: Adobe Interview Questions, Interview Questions, Microsoft Interview Questions, problem Tagged With: Mathematical, Queue

Print vertical sum of all the axis in the given binary tree

July 15, 2014 by Dhaval Dave

Print Vertical Sum of all the axis in the given binary Tree.

Most of times in written test , you will encounter this very good question.
given a binary tree.
(most of times a complete
… Read More

Filed Under: Amazon Interview Question, Flipkart Interview Questions, Interview Questions, Microsoft Interview Questions, problem Tagged With: Binary Tree, tree

N Petrol bunks or City arranged in circle. You have Fuel and distance between petrol bunks. Is it possible to find starting point so that we can travel all Petrol Bunks

July 11, 2014 by Dhaval Dave

Find the first circular tour that visits all petrol pumps

There are n petrol bunks arranged in circle. Each bunk is separated from the rest by a certain distance. You choose some mode of travel
… Read More

Filed Under: Amazon Interview Question, Array, Flipkart Interview Questions, Hacker Earth Questions, Interview Questions, Microsoft Interview Questions, problem Tagged With: Array

robot standing at first cell of an M*N matrix. It can move only in two directions, right and down. In how many ways, it can reach to the last cell i.e. (M, N) Code it

July 10, 2014 by Dhaval Dave

Robot standing at first cell of an M*N matrix. It can move only in two directions, right and down. In how many ways, it can reach to the last cell i.e. (M, N) Code it.

… Read More

Filed Under: Amazon Interview Question, Data Structure, Interview Questions, Microsoft Interview Questions, problem Tagged With: 2d matrix, Dynamic Programming, Recursion

Rectangular chocolate bar Create at least one piece which consists of exactly nTiles tiles

July 10, 2014 by Dhaval Dave

Rectangular chocolate bar Create at least one piece which consists of exactly nTiles tiles.

You have a rectangular chocolate bar that consists of width x height square tiles. You can split it into two rectangular … Read More

Filed Under: Array, Flipkart Interview Questions, Hacker Earth Questions, Interview Questions, problem Tagged With: Array, Mathematical

25 horses 5 tracks Find 3 fastest puzzle

June 10, 2014 by Dhaval Dave

Suppose you have 25 horses, and you want to pick the fastest 3 horses out of those 25. In each race, only 5 horses can run at the same time in a race because there

… Read More

Filed Under: Interview Questions, Puzzle Tagged With: Puzzle

Printing Longest Common Subsequence

April 25, 2014 by Dhaval Dave

Printing Longest Common Subsequence

Given two sequences, print the longest subsequence present in both of them.

Examples:
LCS for input Sequences “ABCDGH” and “AEDFHR” is “ADH” of length 3.
LCS for input Sequences “AGGTAB” and

… Read More

Filed Under: Amazon Interview Question, Interview Questions, Microsoft Interview Questions, problem Tagged With: 2d matrix, Dynamic Programming, string

Given a string, find the first character which is non-repetitive

April 13, 2014 by Dhaval Dave

Given a string, find the first character which is non -repetitive i.e that character must not be present anywhere else in the string.

With two different solutions.

Eg : Input : teeterson      
     Output : r, 
… Read More

Filed Under: Hacker Earth Questions, Interview Questions, problem Tagged With: string

flattens 2 D linked list to a single sorted link list

March 27, 2014 by Dhaval Dave

Write a function flatten() which flattens this linked list with each node down sorted link list to a single link list with all the elements in sorted order.

We have given Two methods in O(n^2)

… Read More

Filed Under: Amazon Interview Question, Flipkart Interview Questions, Microsoft Interview Questions, problem Tagged With: Linked List, Merge Sort

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