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  1. #include "bits/stdc++.h"
  2. using namespace std;
  3.  
  4. #define OO INT_MAX/10
  5. #define PB push_back
  6. #define MP make_pair
  7. #define MOD 1000000007
  8. #define EPS 1e-9
  9. #define endl "\n"
  10. #define all(v) (v).begin(),(v).end()
  11.  
  12. typedef long long int ll;
  13. typedef pair<int,int> ii;
  14. typedef vector <int>vi;
  15. typedef vector <ii>vii;
  16. typedef vector<vi> vvi;
  17. typedef vector<vii>vvii;
  18.  
  19. void read()
  20. {
  21. #ifdef OR_WORKSTATION
  22.     freopen("in.in","rt",stdin);
  23.     freopen("outt.out","wt",stdout);
  24. #endif
  25. }
  26.  
  27. vector<bool>a;
  28. vi primes;
  29. void sieve ()
  30. {
  31.     int n=1500;
  32.     a.assign(n,1);
  33.     a[0]=0;
  34.     a[1]=0;
  35.     for(int i=2;i<1500;i++)
  36.     {
  37.         if(a[i])
  38.         {
  39.             for(int j=i*i;j<n;j+=i)
  40.                 a[j]=0;
  41.             primes.PB(i);
  42.         }
  43.  
  44.     }
  45.  
  46. }
  47.  
  48. int main()
  49. {
  50.     read();
  51.     sieve();
  52.     int n;
  53.     while(cin>>n)
  54.     {
  55.         vi v;
  56.         for(int i=0;i<=169;i++)
  57.         {
  58.             int tmp=primes[i];
  59.             if(tmp>n)
  60.                 break;
  61.             int cnt=1;
  62.             while(1)
  63.             {
  64.                 tmp=pow(primes[i],cnt++);                
  65.                 if(tmp>n)
  66.                     break;
  67.                 v.PB(tmp);   
  68.             }
  69.         }
  70.         int l=v.size();
  71.         cout<<l<<endl;
  72.         for(int i=0;i<l;i++)
  73.             cout<<v[i]<<" ";
  74.         cout<<endl;
  75.     }
  76.  
  77.  
  78. }
Success #stdin #stdout 0s 2868KB
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https://ideone.com/hIQ3BM
language:
C++ 4.3.2 (gcc-4.3.2)
created:
9 years ago
visibility:
public

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