Count Primes LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]

by
LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]

LeetCode Problem | LeetCode Problems For Beginners | LeetCode Problems & Solutions | Improve Problem Solving Skills | LeetCode Problems Java | LeetCode Solutions in C++

Hello Programmers/Coders, Today we are going to share solutions to the Programming problems of LeetCode Solutions in C++, Java, & Python. At Each Problem with Successful submission with all Test Cases Passed, you will get a score or marks and LeetCode Coins. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.

Also check out these Leetcode Solutions:

In this post, you will find the solution for the Count Primes in C++, Java & Python-LeetCode problem. We are providing the correct and tested solutions to coding problems present on LeetCode. If you are not able to solve any problem, then you can take help from our Blog/website.

Use “Ctrl+F” To Find Any Questions Answer. & For Mobile User, You Just Need To Click On Three dots In Your Browser & You Will Get A “Find” Option There. Use These Option to Get Any Random Questions Answer.

About LeetCode

LeetCode is one of the most well-known online judge platforms to help you enhance your skills, expand your knowledge and prepare for technical interviews. 

LeetCode is for software engineers who are looking to practice technical questions and advance their skills. Mastering the questions in each level on LeetCode is a good way to prepare for technical interviews and keep your skills sharp. They also have a repository of solutions with the reasoning behind each step.

LeetCode has over 1,900 questions for you to practice, covering many different programming concepts. Every coding problem has a classification of either Easy, Medium, or Hard.

LeetCode problems focus on algorithms and data structures. Here is some topic you can find problems on LeetCode:

  • Mathematics/Basic Logical Based Questions
  • Arrays
  • Strings
  • Hash Table
  • Dynamic Programming
  • Stack & Queue
  • Trees & Graphs
  • Greedy Algorithms
  • Breadth-First Search
  • Depth-First Search
  • Sorting & Searching
  • BST (Binary Search Tree)
  • Database
  • Linked List
  • Recursion, etc.

Leetcode has a huge number of test cases and questions from interviews too like Google, Amazon, Microsoft, Facebook, Adobe, Oracle, Linkedin, Goldman Sachs, etc. LeetCode helps you in getting a job in Top MNCs. To crack FAANG Companies, LeetCode problems can help you in building your logic.

Link for the Problem – Count Primes– LeetCode Problem 

Count Primes– LeetCode Problem

Problem:

Given an integer n, return the number of prime numbers that are strictly less than n.

Example 1:

Input: n = 10
Output: 4
Explanation: There are 4 prime numbers less than 10, they are 2, 3, 5, 7.

Example 2:

Input: n = 0
Output: 0

Example 3:

Input: n = 1
Output: 0

Constraints:

  • 0 <= n <= 5 * 106
Count Primes– LeetCode Solutions
Count Primes Solution in C++:
class Solution {
 public:
  int countPrimes(int n) {
    if (n <= 2)
      return false;

    vector<bool> prime(n, true);
    prime[0] = false;
    prime[1] = false;

    for (int i = 0; i < sqrt(n); ++i)
      if (prime[i])
        for (int j = i * i; j < n; j += i)
          prime[j] = false;

    return count(begin(prime), end(prime), true);
  }
};

Count Primes Solution in Java:
class Solution {
  public int countPrimes(int n) {
    if (n <= 2)
      return 0;

    int ans = 0;
    boolean[] prime = new boolean[n];
    Arrays.fill(prime, 2, n, true);

    for (int i = 0; i < Math.sqrt(n); ++i)
      if (prime[i])
        for (int j = i * i; j < n; j += i)
          prime[j] = false;

    for (final boolean p : prime)
      if (p)
        ++ans;

    return ans;
  }
}

Count Primes Solution in Python:
class Solution:
  def countPrimes(self, n: int) -> int:
    if n <= 2:
      return 0

    isPrime = [False] * 2 + [True] * (n - 2)

    for i in range(2, int(n**0.5) + 1):
      if isPrime[i]:
        for j in range(i * i, n, i):
          isPrime[j] = False

    return sum(isPrime)
  • Time: O(nloglogn)
  • Space: O(n)

252 thoughts on “Count Primes LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]”

  73. Hi there terrific blog! Does running a blog like this take a great deal of work? I have virtually no expertise in computer programming but I was hoping to start my own blog soon. Anyway, if you have any recommendations or tips for new blog owners please share. I know this is off topic nevertheless I just had to ask. Thank you!

    Reply

  77. Pretty section of content. I just stumbled upon your web site and in accession capital to assert that I acquire in fact enjoyed account your blog posts. Any way I’ll be subscribing to your augment and even I achievement you access consistently fast.

    Reply

  90. Hello there! I know this is kinda off topic but I was wondering if you knew where I could get a captcha plugin for my comment form? I’m using the same blog platform as yours and I’m having difficulty finding one? Thanks a lot!

    Reply

  96. I have been surfing online more than 2 hours today, yet I never found any interesting article like yours. It’s pretty worth enough for me. Personally, if all site owners and bloggers made good content as you did, the internet will be much more useful than ever before.

    Reply

  107. Unquestionably believe that which you stated. Your favorite justification appeared to be on the net the simplest thing to be aware of. I say to you, I definitely get irked while people consider worries that they plainly do not know about. You managed to hit the nail upon the top as well as defined out the whole thing without having side effect , people can take a signal. Will likely be back to get more. Thanks

    Reply

  114. Hello would you mind letting me know which hosting company you’re working with? I’ve loaded your blog in 3 completely different internet browsers and I must say this blog loads a lot quicker then most. Can you suggest a good web hosting provider at a reasonable price? Kudos, I appreciate it!

    Reply

  119. I must thank you for the efforts you have put in writing this blog. I am hoping to view the same high-grade blog posts from you in the future as well. In fact, your creative writing abilities has motivated me to get my very own website now 😉

    Reply

  131. Hi there fantastic blog! Does running a blog like this take a great deal of work? I have virtually no knowledge of programming but I was hoping to start my own blog soon. Anyways, if you have any recommendations or tips for new blog owners please share. I know this is off topic nevertheless I just needed to ask. Thanks a lot!

    Reply

  138. Hey I know this is off topic but I was wondering if you knew of any widgets I could add to my blog that automatically tweet my newest twitter updates. I’ve been looking for a plug-in like this for quite some time and was hoping maybe you would have some experience with something like this. Please let me know if you run into anything. I truly enjoy reading your blog and I look forward to your new updates.

    Reply

  143. order amoxicillin online no prescription: [url=https://amoxicillins.com/#]rexall pharmacy amoxicillin 500mg[/url] amoxicillin capsules 250mg

    Reply

  184. Hey are using WordPress for your blog platform? I’m new to the blog world but I’m trying to get started and create my own. Do you need any coding knowledge to make your own blog? Any help would be greatly appreciated!

    Reply

  192. india pharmacy mail order [url=https://indiapharmacy.cheap/#]indian pharmacy online[/url] cheapest online pharmacy india

    Reply

  195. online shopping pharmacy india [url=http://indiapharmacy.cheap/#]cheapest online pharmacy india[/url] п»їlegitimate online pharmacies india

    Reply

  199. To understand true to life news, follow these tips:

    Look fitted credible sources: http://fcdoazit.org/img/pgs/?what-news-does-balthasar-bring-to-romeo.html. It’s important to safeguard that the news source you are reading is reliable and unbiased. Some examples of good sources include BBC, Reuters, and The Fashionable York Times. Review multiple sources to get a well-rounded view of a particular news event. This can help you return a more over paint and keep bias. Be in the know of the viewpoint the article is coming from, as flush with respectable news sources can compel ought to bias. Fact-check the information with another fountain-head if a expos‚ article seems too lurid or unbelievable. Many times make unshakeable you are reading a fashionable article, as news can change-over quickly.

    Nearby following these tips, you can become a more informed scandal reader and better understand the world about you.

    Reply

  200. To presume from verified scoop, ape these tips:

    Look representing credible sources: http://fcdoazit.org/img/pgs/?what-news-does-balthasar-bring-to-romeo.html. It’s material to secure that the news roots you are reading is worthy and unbiased. Some examples of reputable sources subsume BBC, Reuters, and The Modish York Times. Review multiple sources to get a well-rounded sentiment of a discriminating statement event. This can better you listen to a more over paint and avoid bias. Be aware of the position the article is coming from, as flush with good news sources can compel ought to bias. Fact-check the information with another source if a scandal article seems too sensational or unbelievable. Many times pass persuaded you are reading a advised article, as news can substitute quickly.

    By following these tips, you can evolve into a more au fait dispatch reader and more wisely understand the world about you.

    Reply

  204. Hi, I do believe this is an excellent blog. I stumbledupon it 😉 I will come back once again since I book-marked it. Money and freedom is the best way to change, may you be rich and continue to help other people.

    Reply

  205. Great blog you have here but I was wanting
    to know if you knew of any user discussion forums that cover
    the same topics talked about in this article? I’d really love to
    be a part of community where I can get responses from other knowledgeable individuals that
    share the same interest. If you have any suggestions, please let me know.
    Thank you!

    Reply

  210. Altogether! Find info portals in the UK can be overwhelming, but there are tons resources ready to cure you think the unmatched one because you. As I mentioned before, conducting an online search with a view https://blog.halon.org.uk/pag/what-is-laura-ingle-s-age-exploring-laura-ingle-s.html “UK scuttlebutt websites” or “British intelligence portals” is a pronounced starting point. Not only purposefulness this hand out you a thorough list of report websites, but it choice also provide you with a punter understanding of the common hearsay prospect in the UK.
    Aeons ago you obtain a liber veritatis of potential story portals, it’s powerful to evaluate each anyone to determine which upper-class suits your preferences. As an case, BBC Advice is known quest of its disinterested reporting of intelligence stories, while The Keeper is known representing its in-depth criticism of bureaucratic and group issues. The Disinterested is known representing its investigative journalism, while The Times is known in search its business and finance coverage. During entente these differences, you can decide the talk portal that caters to your interests and provides you with the newsflash you want to read.
    Additionally, it’s worth all things neighbourhood pub news portals for explicit regions within the UK. These portals yield coverage of events and good copy stories that are relevant to the area, which can be especially helpful if you’re looking to hang on to up with events in your town community. In place of event, shire communiqu‚ portals in London number the Evening Standard and the Londonist, while Manchester Evening News and Liverpool Reflection are stylish in the North West.
    Overall, there are numberless bulletin portals accessible in the UK, and it’s high-ranking to do your digging to remark the joined that suits your needs. At near evaluating the unconventional news portals based on their coverage, dash, and essay perspective, you can select the a person that provides you with the most relevant and engrossing despatch stories. Good fortunes with your search, and I anticipation this bumf helps you discover the practised news broadcast portal inasmuch as you!

    Reply

  211. Absolutely! Find expos‚ portals in the UK can be unendurable, but there are tons resources accessible to cure you mark the best identical for you. As I mentioned formerly, conducting an online search with a view https://oksol.co.uk/wp-content/pages/reasons-for-kaitlin-monte-s-departure-from-fox-26.html “UK news websites” or “British story portals” is a vast starting point. Not only desire this hand out you a encyclopaedic shopping list of report websites, but it choice also provide you with a improved savvy comprehension or of the current communication prospect in the UK.
    Once you obtain a list of imminent rumour portals, it’s powerful to evaluate each one to choose which upper-class suits your preferences. As an case, BBC Intelligence is known in place of its intention reporting of report stories, while The Keeper is known for its in-depth criticism of bureaucratic and sexual issues. The Self-governing is known representing its investigative journalism, while The Times is known in the interest of its vocation and investment capital coverage. Not later than arrangement these differences, you can pick out the rumour portal that caters to your interests and provides you with the rumour you hope for to read.
    Additionally, it’s significance considering local expos‚ portals with a view proper to regions within the UK. These portals produce coverage of events and news stories that are akin to the area, which can be firstly helpful if you’re looking to safeguard up with events in your close by community. In behalf of exemplar, local good copy portals in London number the Evening Pier and the Londonist, while Manchester Evening News and Liverpool Echo are popular in the North West.
    Blanket, there are many news portals available in the UK, and it’s important to do your experimentation to unearth the everybody that suits your needs. At near evaluating the contrasting news broadcast portals based on their coverage, luxury, and position statement viewpoint, you can judge the individual that provides you with the most fitting and captivating despatch stories. Esteemed luck with your search, and I anticipation this data helps you find the just right news broadcast portal suitable you!

    Reply

  212. Positively! Conclusion information portals in the UK can be awesome, but there are tons resources at to boost you mark the unmatched the same for you. As I mentioned formerly, conducting an online search an eye to https://projectev.co.uk/wp-content/pages/index.php?how-much-does-rachel-campos-duffy-make-on-fox-news.html “UK hot item websites” or “British news portals” is a vast starting point. Not one purposefulness this chuck b surrender you a comprehensive slate of report websites, but it intention also provender you with a heartier pact of the in the air news prospect in the UK.
    Once you have a itemize of embryonic story portals, it’s critical to gauge each undivided to choose which best suits your preferences. As an case, BBC Advice is known benefit of its ambition reporting of report stories, while The Trustee is known representing its in-depth criticism of bureaucratic and group issues. The Independent is known championing its investigative journalism, while The Times is known in the interest of its work and investment capital coverage. Not later than arrangement these differences, you can select the news portal that caters to your interests and provides you with the rumour you have a yen for to read.
    Additionally, it’s worth looking at neighbourhood scuttlebutt portals representing explicit regions within the UK. These portals yield coverage of events and scoop stories that are akin to the область, which can be especially cooperative if you’re looking to charge of up with events in your close by community. In behalf of event, provincial news portals in London number the Evening Pier and the Londonist, while Manchester Evening Hearsay and Liverpool Reproduction are stylish in the North West.
    Comprehensive, there are tons tidings portals accessible in the UK, and it’s significant to do your research to find the joined that suits your needs. At near evaluating the unalike low-down portals based on their coverage, dash, and essay angle, you can select the individual that provides you with the most related and attractive info stories. Decorous success rate with your search, and I anticipate this tidings helps you discover the practised news portal since you!

    Reply

  219. Pretty nice post. I just stumbled upon your blog and wanted to say that I have really enjoyed browsing your blog posts. In any case I’ll be subscribing to your feed and I hope you write again soon!

    Reply

  228. Anna Berezina is a famed originator and keynoter in the area of psychology. With a background in clinical psychology and voluminous probing involvement, Anna has dedicated her employment to agreement human behavior and unstable health: https://zenwriting.net/manxmargin78/fine-art-with-anna-berezina-capturing-the-essence-of-beauty-in-paintings. Middle of her form, she has made impressive contributions to the battleground and has fit a respected reflection leader.

    Anna’s judgement spans a number of areas of emotions, including cognitive screwball, unquestionable psychology, and ardent intelligence. Her comprehensive education in these domains allows her to stock up valuable insights and strategies exchange for individuals seeking in person proliferation and well-being.

    As an originator, Anna has written several controlling books that bear garnered widespread recognition and praise. Her books provide functional information and evidence-based approaches to aide individuals decoy fulfilling lives and reveal resilient mindsets. Via combining her clinical judgement with her passion suited for dollop others, Anna’s writings drink resonated with readers around the world.

    Reply

  239. I am currently writing a paper and a bug appeared in the paper. I found what I wanted from your article. Thank you very much. Your article gave me a lot of inspiration. But hope you can explain your point in more detail because I have some questions, thank you. 20bet

    Reply

  243. An impressive share! I have just forwarded this onto a friend who had been doing a little research on this. And he in fact bought me breakfast because I found it for him… lol. So let me reword this…. Thank YOU for the meal!! But yeah, thanx for spending the time to discuss this matter here on your internet site.

    Reply

  245. First off I want to say wonderful blog! I had a quick question that I’d like to ask if you don’t mind. I was curious to know how you center yourself and clear your thoughts before writing. I have had a tough time clearing my mind in getting my thoughts out. I do enjoy writing but it just seems like the first 10 to 15 minutes are usually wasted just trying to figure out how to begin. Any suggestions or tips? Thanks!

    Reply

  250. My brother suggested I would possibly like this website. He used to be totally right. This post actually made my day. You cann’t believe just how much time I had spent for this information! Thank you!

    Reply

  251. Howdy! Do you know if they make any plugins to help with SEO? I’m trying to get my blog to rank for some targeted keywords but I’m not seeing very good results. If you know of any please share. Cheers!

    Reply

Leave a Comment

Ads Blocker Image Powered by Code Help Pro

Ads Blocker Detected!!!

We have detected that you are using extensions to block ads. Please support us by disabling these ads blocker🙏.

Powered By
Best Wordpress Adblock Detecting Plugin | CHP Adblock