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Please Login in order to post a comment. The number of primes in each number is O log MAXwhich allows you to put each index number in a bucket for every prime in that number Using a sieve or some like that. Gotta learn more number theory. How did you do it without checking every no with every prime? Just use disjoint set to get number of connected components. Please read my query and then answer?

But look in one of those cases, first group will be empty no members when all of the elements are in the other group. This can happen to the second group as well. I've used the same equation to find the solution. When I checked some outputs in test cases, I've seen some odd values. How is it possible to find an odd value with this equation?

Update Thanks for noticing ,the 1 is special case. Number of 1s should be added to number of components.

I think the solution is still wrong, and the correct answer should be Let m be the number of ones; for each of these cases, we can split the 1s as 0, m1, m-1The problem statement says. I'm not sure what I did wrong. I thought my solution would work for all possible inputs. I used a disjoint set datastructure and called union on any two numbers that shared any number in their factorization.

Then I'll get the number of disjoint sets that can be separate from one another. I subtract 2 because you can't have all elements in P or all in Q. I'm not sure what's wrong with this, as I only solved test cases Hopefully someone else can elaborate.

Edit: I figured it out. Just weird. I didn't participate to the contest but now just solving for practice. In test case 3 my two results coming different,instead of Here what my return value looks like now:.

I did actually end up figuring it out with the help of cbosh. He showed me a fast mod expoential calculator that I was able to use to get the result I need. It is related with count of 1's, gcd of any integer with 1 is 1.

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Date: October 21, Author: amritchhetri06 0 Comments. Problem Statement: Click here for the problem statement. Solution in java lets say your input is 4 aba baba aba xzxb 3 aba xzxb ab here 1st line indicate the no of input string i. Share this: Twitter Facebook.

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## hackerrank-Quicksort 2-Sorting C++

Add Two Numbers II. Feb 8, Add Two Numbers. Add and Search Word - Data structure design. All Paths From Source to Target.The previous version of Quicksort was easy to understand, but it was not optimal. It required copying the numbers into other arrays, which takes up space and time. To make things faster, one can create an "in-place" version of Quicksort, where the numbers are all sorted within the array itself.

Challenge Create an in-place version of Quicksort. You need to follow Lomuto Partitioning method. Guideline Instead of copying the array into multiple sub-arrays, use indices to keep track of the different sub-arrays.

You can pass the indices to a modified partition method. The partition method should partition the sub-array and then return the index location where the pivot gets placed, so you can then call partition on each side of the pivot. Since you cannot just create new sub-arrays for the elements, partition method will need to use another trick to keep track of which elements are greater and which are lower than the pivot.

Output Format Print the entire array on a new line at the end of every partitioning method. Constraints There are no duplicate numbers. Explanation 5 is initally selected as the pivot, and the array is partitioned as shown in the diagram. The left side is partitioned next with 2 as the pivot. Finally, the right side is partitioned with 8 as the pivot.

Problem Submissions Leaderboard Discussions. Always select the last element in the 'sub-array' as a pivot. Partition the left side and then the right side of the sub-array.

Print out the whole array at the end of every partitioning method. An array of length or less will be considered sorted, and there is no need to sort or to print them. The In-place Trick If an element is lower than the pivot, you should swap it with a larger element on the left-side of the sub-array. Greater elements should remain where they are. At the end of the partitioning method, the pivot should be swapped with the first element of the right partition, consisting of all larger elements, of the sub-array.

To ensure that you don't swap a small element with another small element, use an index to keep track of the small elements that have already been swapped into their "place". Input Format There will be two lines of input: - the size of the array - the numbers of the array Output Format Print the entire array on a new line at the end of every partitioning method.

Sample Input 7 1 3 9 8 2 7 5 Sample Output 1 3 2 5 9 7 8 1 2 3 5 9 7 8 1 2 3 5 7 8 9 Explanation 5 is initally selected as the pivot, and the array is partitioned as shown in the diagram.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Now, I may get negative points because perhaps somewhere in vast internet there is already an answer to this but I tried to look for it and I simply couldnt find it.

The gist of the problem is that HackerRanks wants you to create an array with a size decided by the user, then have the user add its values integers and finally have the program sum its values. There are plenty of ways to do it and I already know how to but my problem is that I just can't understand Hackerrank's code sample in C it gave me. I commented the parts I don't understand, which is most of it:. I know some people hate HackerRank, and honestly, I do too but it does gives me some nice ways to test my limited skills in coding with c and testing my logic.

So, if there are better sites that helps you test your logic as a CS please share them with me. Here is the code I made to solve this problem in Visual Studio but for some stupid reason Hackerrank wont accept it unless I make custom inputs:.

You need to convert to string array since if you're on the main method, all it gets are string values from the argument list. I agree that it doesn't make sense to send the first argument n in simpleArraySum because n is simply unused.

Parse ; it simply tries to take in all the integers into the array. It is also risky because if you accidentally pass in a string then it will throw an error i. Personally I think the main method should not be interested in getting involved too much with the data, the heavy lifting should be done in the methods. The better version perhaps would be to modify simpleArraySum and refactor that line in like:.

I introduced the use of generic list because it's more readable if not cleaner, although the use of List might look overkill to some programmers and might not be as light weight as just using an array, hence on the other hand you can easily stick to using arrays except that it needs to be initialized with the length i.

Length]; Roughly:. ConvertAll takes a string and convert it to one type array int or float for example. Learn more. Asked 2 years, 9 months ago. Active 11 months ago. Viewed 3k times. ToInt32 Console. What is the parse for?

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am doing this Array Manipulation problem from hackerrank and it tells me compile error is Terminated due to timeout. For small arrays my method work perfectly.

### Arrays - DS

This error only happens for bigger array values. Here is the question link. Question Here. Starting with a 1-indexed array of zeros and a list of operations, for each operation add a value to each of the array element between two given indices, inclusive. Once all operations have been performed, return the maximum value in your array. Given below are few test classes that doesn't work with my code. Test1 Test2 Test3. Please help me to figure this out. I searched for lots of answers based on java.

But I couldn't understand them.

This is my last resort. Please help. First of all, in case you don't realize it, Terminated due to timeout is not a compilation error, it means that your implementation is too slow. The challenge is not to implement any correct solution to the problem. The solution must also be efficient.

Since your solution is inefficient, it fails for large inputs due to being too slow. Since the number of queries seems to be 2 orders of magnitude smaller than the length of the array K vs. I'm not going to give you an implementation, but I'll suggest an algorithm that should be more efficient than your current implementation.

Add the first query to a list of processed queries, which will contain queries with disjoint sub-array ranges. This list will be sorted by the first array index you will keep it sorted by adding new elements in the proper position.

For each query not processed yet, find all the processed queries that overlap it you can do it using binary search to improve performence.

Implement An LRU Cache - The LRU Cache Eviction Policy ("LRU Cache" on LeetCode)

Split the current query in a way that the resulting queries will each be either fully contained in an existing processed query or not contained in each existing processed query. As you process the queries you keep track of the max processed query value, so after you process all the queries you know that the max value is Brute-force solution is not going to work here due to the given time constraint.

That is the reason you will get the time out error.

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Whenever we add anything at any index into an array and apply prefix sum algorithm the same element will be added to every element till the end of the array.

Here we are only updating two indices for every query so complexity will be O 1. Now you can traverse this array to find max which is Note: If searching for video tutorialyou must check it out here for detailed explanation.

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Learn more. Asked 10 months ago. Active 8 months ago. Viewed 1k times. Question Here Starting with a 1-indexed array of zeros and a list of operations, for each operation add a value to each of the array element between two given indices, inclusive.In the previous challenge, you wrote a partition method to split an array into two sub-arrays, one containing smaller elements and one containing larger elements than a given number.

Can you repeatedly use partition to sort an entire array? Guideline In Insertion Sort, you simply went through each element in order and inserted it into a sorted sub-array. If partition is then called on each sub-array, the array will now be split into four parts. This process can be repeated until the sub-arrays are small.

### Quicksort 1 - Partition

Notice that when partition is called on just one numbers, they end up being sorted. Print Sub-Arrays In this challenge, print your array every time your partitioning method finishes, i. Note Please maintain the original order of the elements in the left and right partitions while partitioning around a pivot element. Task The method quickSort takes in a parameter, a r aran unsorted array. Use the Quicksort algorithm to sort the entire array.