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  1. #include <iostream>
  2. #include <vector>
  3. #include <cmath>
  4.  
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9.     int N;
  10.     cin >> N;
  11.     vector<int> lp(N+1, 0);
  12.     vector<int> pr;
  13.     for (int i = 2; i <= N; ++i)
  14.     {
  15.         if (lp[i] == 0)
  16.         {
  17.             lp[i] = i;
  18.             pr.push_back(i);
  19.         }
  20.         for (int j = 0; j < (int)pr.size() && pr[j] <= lp[i] && i * pr[j] <= N; ++j)
  21.         {
  22.             lp[i * pr[j]] = pr[j];
  23.         }
  24.     }
  25.     for(int i = 0; i < pr.size(); i++) {
  26.     	cout << pr[i] << " ";
  27.     }
  28.     return 0;
  29. }
Success #stdin #stdout 0s 15240KB
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stdin
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100
stdout
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2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
https://ideone.com/WI418w
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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