We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Mathematics
  3. Number Theory
  4. Twins
  5. Discussions

Twins

Sort by

recency

|

96 Discussions

|

  • harpercrane3
     + 0 comments

    Logo Design Canada offers state-of-the-art graphic and custom logo designing services across Canada. Their wide range of services include posters, brochures, animations, presentations, stationary and company profile design. Their vast portfolio makes them capable enough to be considered among leading logo design company in Canada. Ping with your custom quote and unlock the potential of your brand with Logo Design Canada

  • awaismughal75099
     + 0 comments

    Power Adapter Supply 3V, 2A, STOCK-LOT When it comes to choosing a power supply adapter, you need to ensure that you are getting a reliable, efficient, and high-quality product. A power supply adapter is essential for converting AC power from the wall outlet into the appropriate DC voltage for your devices. Whether you're powering electronics, gadgets, or appliances, the right power supply adapter can make a huge difference in terms of performance and safety. If you're looking for the best power supply adapter, epro.pk is the best place to shop. The Best Power Supply Adapter's Key Features: Voltage & The amplifier Integration: The best power supply adapters are compatible with a wide range of devices since they include adjustable voltage and amperage settings. Power supply adapters that handle a broad range of voltage levels and amperages are available at epro.pk. This adapter's versatility is essential for making sure it functions with various electronic brands and models.

    Protection Over Overloading: In order to avoid overheating and harming your gadgets as well as the adapter itself, a high-quality power supply adapter will incorporate overload protection. This is especially crucial if you intend to use the adapter for extended periods of time. Every adapter offered on epro.pk's platform is examined for dependability and safety. Short and Small Planning: The portability of contemporary power supply adapters is one of their outstanding qualities. You won't have to worry about your adapter taking up too much room because of its small size and light weight. A portable converter is essential whether you're traveling or just need a power supply in different places. A range of powerful and portable power supply adapters are available at epro.pk, making them ideal for use while traveling.

    High Effectiveness: When choosing the best power supply adaptor, efficiency is crucial. In addition to being ecologically beneficial, a high-efficiency adapter will minimize energy loss, saving you money on electricity costs. You can be confident that you're investing wisely because epro.pk offers adapters with optimal efficiency.

    Life and Durability: An important consideration when selecting a power supply adapter is durability. Even with constant usage, the best adapters are made to resist deterioration. You may avoid having to replace your adapter too often by purchasing adapters from epro.pk that are constructed of sturdy materials and are meant to last.

    Best Adapter supply for use:The greatest power supply adapter will give stability, stop overheating, and extend the life of your gadgets, whether you're powering a laptop, camera, or home electronics. Top-rated, secure, and effective power supply adapters are available on epro.pk to satisfy all of your requirements.

    Why Purchase Adapters for Power Supplies from ePro.pk?

    Large Product Selection: Whether you're searching for a specialized or all-purpose power supply adapter, epro.pk has a large selection to help you get exactly what you need.

    Competitive Pricing: You may acquire the best power supply adapters at reasonable costs without sacrificing quality when you purchase from epro.pk. Discounts and promotions are frequently offered on the website.

    Easy Online Buying: epro.pk makes it easy and convenient to buy power supply adapters. You can quickly narrow down your search by voltage, adapter type, and other details.

    For more info: https://epro.pk/product/power-adapter-supply-3v-2a-stock-lot/

    Tags: #PowerAdapter

    ACtoDCAdapter

    #Power Supply #DCPowerSupply #VoltageConverter #USBPowerAdapter #LaptopPowerAdapter

  • chtcholeg1
     + 0 comments

    int solve(long long n, long long m) { // Prime flags in the interval between n and m // It's like Eratosthenes sieve but with offset vector intervalNumbers(m - n + 1, true); if (intervalNumbers.size() < 2) { return 0; } if (n == 1) { intervalNumbers[0] = false; }

    // Eratosthenes sieve from 0 to square root of m
const int lim = sqrt(m);
vector<bool> eratosthenesSieve(lim + 1, true);
eratosthenesSieve[0] = false;
eratosthenesSieve[1] = false;

// Set flags + add primes to vector
vector<long long> primes;
for(int i = 2; i <= lim; ++i) {
    if(eratosthenesSieve[i]) {
        primes.push_back(i);
        for(int j = i * 2; j <= lim; j += i) {
            eratosthenesSieve[j] = false;
            if ( (j >= n) && (j <= m) ) {
                intervalNumbers[j - n] = false;
            }
        }
    }
}

// Set flags for the interval 
for(const long long i: primes) {
    for(int j = max(i * 2, (n + i  - 1) / i * i); j <= m; j += i) {
        intervalNumbers[j - n] = false;            
    }
}

// Calculating
long long int twinCount = 0;
for(size_t i = 0 ; i < intervalNumbers.size() - 2; ++i) {
    if(intervalNumbers[i] && intervalNumbers[i + 2]) {
        ++twinCount;
    }
} 

return twinCount;

    }

  • hannahstephens31
     + 1 comment

    Looking for unique name tags in Dubai? Custom Patches UAE offers personalized name badges that enhance your branding and make your staff stand out. Our high-quality materials and custom designs ensure your name tag reflects expertise. Perfect for events, conferences, or everyday work.

  • CS_2212256_T
     + 0 comments
    import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

public class Solution {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		System.out.println(solve(n, m));

		sc.close();
	}

	static int solve(int n, int m) {
		int size = m - n + 1;
		List<Integer> primeDivisors = sievePrimes(size);

		boolean[] primes = new boolean[size];
		Arrays.fill(primes, true);

		for (int primeDivisor : primeDivisors) {
			for (int i = n / primeDivisor * primeDivisor; i <= m; i += primeDivisor) {
				if (i >= n && i > primeDivisor) {
					primes[i - n] = false;
				}
			}
		}

		int result = 0;
		for (int i = 0; i + 2 < primes.length; i++) {
			if (n + i >= 2 && primes[i] && primes[i + 2]) {
				result++;
			}
		}
		return result;
	}

	static List<Integer> sievePrimes(int limit) {
		boolean[] primes = new boolean[limit + 1];
		Arrays.fill(primes, true);

		List<Integer> result = new ArrayList<Integer>();
		for (int i = 2; i < primes.length; i++) {
			if (primes[i]) {
				result.add(i);

				for (long j = (long) i * i; j < primes.length; j += i) {
					primes[(int) j] = false;
				}
			}
		}
		return result;
	}
}