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Published: 22/07/2017I've just solved a problem in Codechef that requires finding the Nth Fibonacci number in O(log n). I used the fast doubling method mentioned here : F(2N) = F(N) * ( 2F(N+1)  F(N) ) F(2N+1) = F(N+1)^ ... Read moreSource: stackoverflow.com


Published: 22/07/2017Suppose there are two users say for example you and me, need is to check if the number selected by me in the set of 1 to n, n may be any number ,is same or greater or smaller than the number selected ... Read moreSource: stackoverflow.com

Published: 22/07/2017I'm reading Introduction to Algorithms and on page 69(Maximum subarray problem) in the "A transformation",it's stated that n1 choose 2 = Theta (n^2) subarrays are still needed to check.I don't unders ... Read moreSource: stackoverflow.com

Published: 22/07/2017We want to generate a uniform random number from the interval [0, 1]. Let's first generate k random booleans (for example by rand()<0.5) and decide according to these on what subinterval [m*2^{k}, ... Read moreSource: stackoverflow.com

Published: 22/07/2017I have trajectory data, where each trajectory consists of a sequence of coordinates(x, y points) and each trajectory is identified by a unique ID. These trajectories are in x  y plane, and I want t ... Read moreSource: stackoverflow.com

Published: 22/07/2017A classic algorithm question in 2D version is typically described as Given n nonnegative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to ... Read moreSource: stackoverflow.com

Published: 22/07/2017int steps = 256 * 1024 * 1024; int[] a = new int[2]; // Loop 1 for (int i=0; i<steps; i++) { a[0]++; a[0]++; } // Loop 2 for (int i=0; i<steps; i++) { a[0]++; a[1]++; } Can someone explain why s ... Read moreSource: stackoverflow.com

Published: 22/07/2017Keep in mind I've only started learning Python (first language) a few days back. I'm trying to find the greatest prime factor of a given (and potentially big) integer 'a'. I start by defining a functi ... Read moreSource: stackoverflow.com

Published: 22/07/2017When we open a link from outlook or gmail, it opens up in browser. Is there any kind of design pattern involved in it? Is Factory pattern or Abstract factory pattern applied in this if yes i want to k ... Read moreSource: stackoverflow.com

Published: 22/07/2017I am trying to connect to one of my unix server, but it fails with the error above, can someone please help. JSch jsch = new JSch(); java.util.Properties configuration = new java.util.Properties(); co ... Read moreSource: stackoverflow.com

Published: 22/07/2017Im working with esp266 and I want to create a complete home automation system with different sensors and... I want to have an android app that monitor and controls the system now I can send and reciev ... Read moreSource: stackoverflow.com

Published: 22/07/2017In the Quick Union algorithm imlementation below, inside the root method can we have an if loop (such as if(i != id[i]) instead of the while loop? I think it works just as well. Then why did they use ... Read moreSource: stackoverflow.com

Published: 22/07/2017There is an island surrounded by oil mines. You will be given n companies and m oil mines having values. You have to distribute the mines to "n" companies in fair manner. Remember the companies can ha ... Read moreSource: stackoverflow.com

Published: 22/07/2017Is Dijkstra's algorithm for finding singlesource shortest path the most efficient one for an undirected graph? I am using this algorithm to compute the minimum fare for a bus route from station 1 (st ... Read moreSource: stackoverflow.com

Published: 22/07/2017I need to find the largest power of 2 less than the given number. And I stuck and can't find any solution. Code: public class MathPow { public int largestPowerOf2 (int n) { int res = 2; while (res < ... Read moreSource: stackoverflow.com

Published: 22/07/2017I have a list of items, each of which has a rank associated to it. Item 1, Rank=1 Item 2, Rank=2 Item 3, Rank=3 Item 4, Rank=4 Item 5, Rank=5 I want to design a method which handles reranking of item ... Read moreSource: stackoverflow.com

Published: 22/07/2017I'm having trouble with a google foobar question. I'm only failing one test case. I am suppose to determine the minimum number of moves a knight can make when moving between to points on a test board. ... Read moreSource: stackoverflow.com

Published: 22/07/2017This question already has an answer here: return value of pow() gets rounded down if assigned to an integer 4 answers pow() function in c returns wrong value for integer data. For ex: a=10; b=2; c=po ... Read moreSource: stackoverflow.com

Published: 22/07/2017I've been working on this simple numeric mastermindlike game. At the moment, I have the correct_number_correct_spot counter working, but not the the correct_number_wrong_spot counter. I'm still gettin ... Read moreSource: stackoverflow.com

Published: 21/07/2017This Wikipedia page mentions computation complexity of different mathematical operations, including addition, subtraction, multiplication and division. I'd like to focus on these four. First of all, e ... Read moreSource: stackoverflow.com

Published: 21/07/2017I have the following bunch of arrays: public class ArrayPermutationExample { private static final String PREFIX = "ignore(FAILURE) { build(\"load\", "; public static final String ENDING = ")}"; privat ... Read moreSource: stackoverflow.com
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