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You are given 2 arrays: one representing the time people arrive at a door and other representing the direction they want to go(in or out) You have to find at what time each person will use the door provided no 2 people can use the door at the same time. Constraints: the door starts with ‘in’ position, in case of a conflict(2 or more people trying to use the door at the same time), the direction previously used holds precedence. If there is no conflict whoever comes first uses the door. Also if no one uses the door, it reverts back to the starting ‘in’ position. Should be linear time complexity.

Given a board game of N x M size. A domino is of size 1 x 2 and can be rotated to make it 2 x 1. A player can place a domino in any of the available position. When a player is not able to place a domino, he loses. An AI is created to play against the user. The AI selects a random position in the board and places the domino there. Improve this AI. What solution will be the best when board size is small and what if the board size is large.


Anyone has any idea how to have a solution to this problem?

You have to find out the number of good strings of length N characters in size which you can make using characters A B and C.

A string is a good String if it satisfies the following three criteria:

The total number of C in the string should not be greater than equal to 4.
There should not be more than two consecutive A's in the string.
Any two B's should be at least two characters apart.

How do I find total possible good strings for N length string?
Time constraint of 1 sec for large N

Java:
Managing extreme sports locations:
In such locations, are period of the year when this actities can be performed(ski December - February, Kiting May August, ATV all year), each sport /location usually has an average cost/day.
The sports have hierarcal structure and countaind the country, region and city, we need an ADD, REMOVE, UPDATE; GET a location and all its informations.
exemple:
Switzerland:
Zurich:sky(dec, feb), price 12 $
Berna:ATV - all time , price 10$

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Write a c program to simulate Bankers algorithm for the purpose of deadlock avoidance.

Write a program to create a file and open it in read write mode . Take the input (your choice) from the user . Also display the the last 17 character of the input on the terminal.

Implement Producer - Consumer problem using semaphores

WAP to create two threads . One threads check whether
the number is even or odd while the second threads finds factorial of a numbers.

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I was asked to sort extra large file 10GB which contains single word in each line, within 4GB RAM. I told External sort and optimised it with min-heap but interviewer was asking to optimise disk I/O. As last he told that use CS fundamentals. Don't know what was he expecting. Please help.

deadlock detection is an important consideration in operating system of computer.In this problem you will be given a directed graph representing the state of the system.Your program should detect the whether there are any deadlocks in the system(A deadlock can be created by checking for the cycles in the graph
the input will be in the form
process X holds sources Ri and wants resources Rj ( X holds the Rj means an edge Ri->X and X wants Rj means an edge X->Rj).Note that both processes and resources form nodes of the graph.
Use depth first traversal to determine whether they are the cycles in the graph.The graph contains a cycle if while expanding a node ,you encounter a child that is represent in the path from the root of the current tree to the node being expanded .You can assume that the maximum number number of nodes in the graph will not exceed 50

rain strikes and the roads are flooded .Mr x has to get home from work.your task is to make sure he returns home in the shortest time .consider the roads as a graph with crossing as nodes and the path between two nodes as an edge. SAssume the graph is unidirected and the numbers are numbered .1 to v(v<=50)

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Choose a group of ‘k’ consecutive identical characters and remove them. The operation can be performed any number of times until it is no longer possible.

Finally, print the reduced string.

find the maximum length subarray condition 2 * min > max

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Detect a horizontal line in a bitmap image. Assume there will be some utilities to process the black and white image. you just need to process the utility output and return the start and end indices of the horizontal line if any.

Giving an array of stock prices, find an algorithm of a maximum profit of a series of transactions with a constraint of purchasing one unit at any purchasing transaction.

For example, stock prices
{5, 6, 3, 5, 4, 6, 7}

The transaction sequence would be the following for a maximum profit:

buy on the first day(price 5) and sell on the second day (price 6)
buy on the third day (3) and sell on the 4th day (price 5)
buy on the 5th day and sell on the 7th day (price 7)

A 2d array has 0 and 1 as values. In one flip, 0's are changed to 1 if and only if any of the neighbors (left, right, top, bottom) is 1. Return the total number of flips required to convert the whole grid to 1's

Hi, first of all I want to say thanks to Gayle for the awesome work on the book and online resources. I was reading the introduction section of CtCI and I have a doubt regarding the "remote" preparation to the interview. I see that getting an internship as soon as possible seems to be very important, but I don't understand one thing.

If one is not able to land an internship at a top company like Google or Microsoft early on, would it be better to still do one at a worse company (like a "consulting" firm or less renown company) or at this point dedicating to personal projects that are more interesting that the job you would do there would be evaluated more?

Also, how should a student not in his final year prepare to be admitted to an internship? I've read that internship selection processes can be pretty selective already, and you wouldn't even have the previous internships as a plus on your resume.

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Given a set of integers, the task is to divide it into two sets S1 and S2 such that the absolute difference between their sums is minimum.
If there is a set S with n elements, then if we assume Subset1 has m elements, Subset2 must have n-m elements and the value of abs(sum(Subset1) – sum(Subset2)) should be minimum.

Intelligent Substrings:

There are two types of characters in a particular language: special and normal. A character is special if its value is 1 and normal if its value is 0. Given string s, return the longest substring of s that contains at most k normal characters. Whether a character is normal is determined by a 26-digit bit string named charValue. Each digit in charValue corresponds to a lowercase letter in the English alphabet.

Example:

s = 'abcde'

alphabet = abcdefghijklmnopqrstuvwxyz

charValue = 10101111111111111111111111

For clarity, the alphabet is aligned with charValue below:

alphabet = abcdefghijklmnopqrstuvwxyz

charValue = 10101111111111111111111111

The only normal characters in the language (according to charValue) are b and d. The string s contains both of these characters. For k = 2, the longest substring of s that contains at most k = 2 normal characters is 5 characters long, abcde, so the return value is 5. If k = 1 instead, then the possible substrings are ['b', 'd', 'ab', 'bc', 'cd', 'de', 'abc', 'cde']. The longest substrings are 3 characters long, which would mean a return value of 3.