40 lines
759 B
XML
40 lines
759 B
XML
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Alg;
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class Program // O(n^2)
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{
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static void Main(string[] args)
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{
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int n1 = Convert.ToInt32(Console.ReadLine());
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FindPrimes(n1);
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}
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static void FindPrimes(int n)
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{
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bool[] isPrime = new bool[n + 1];
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for (int i = 2; i <= n; i++)
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{
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isPrime[i] = true;
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}
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for (int i = 2; i <= n; i++)
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{
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if (isPrime[i] == true)
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{
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Console.Write(i + " ");
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for (int j = i * i; j <= n; j += i)
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{
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isPrime[j] = false;
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}
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}
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}
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}
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}
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