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  1. /*
  2.     Cred : SunnyYeahBoi
  3.     It's my last chance (⌐■_■)
  4.     Problem :
  5. */
  6.  
  7. #include<bits/stdc++.h>
  8.  
  9. using namespace std;
  10.  
  11. #define int long long
  12. #define double long double
  13. #define endl "\n"
  14. #define NAME "a"
  15.  
  16. const int MAXN = 1e6 + 5;
  17. const int inf = 1e18;
  18. const int MOD = 1e9 + 7;
  19.  
  20. void FileInput(){
  21.     if(fopen(NAME".inp" , "r") == NULL)
  22.         freopen(NAME".inp" , "w" , stdout);
  23.     freopen(NAME".inp" , "r" , stdin);
  24.     freopen(NAME".out" , "w" , stdout);
  25. }
  26.  
  27. int n;
  28.  
  29. // cong(a , b) trả về a + b
  30.  
  31. const int LIM = 1e7 + 5;
  32. bool isPrime[LIM];
  33.  
  34. void sieve(){
  35.     for(int i = 1 ; i <= LIM ; i++)
  36.         isPrime[i] = true;
  37.  
  38.     isPrime[0] = false;
  39.     isPrime[1] = false;
  40.     for(int i = 2 ; i * i <= LIM ; i++){
  41.         if(isPrime[i] == true){
  42.             for(int j = 2 * i ; j <= LIM ; j += i)
  43.                 isPrime[j] = false;
  44.         }
  45.     }
  46. }
  47.  
  48. int tcs(int x){
  49.     int res = 0;
  50.     while(x > 0){
  51.         res += x % 10;
  52.         x /= 10;
  53.     }
  54.     return res;
  55. }
  56.  
  57. void solve(){
  58.     sieve();
  59.     int l , r;
  60.     cin >> l >> r; 
  61.     for(int i = l ; i <= r ; i++)
  62.         if(isPrime[i] && isPrime[tcs(i)])
  63.             cout << i << " ";    
  64. }
  65.  
  66. int32_t main(){
  67.     FileInput();
  68.     ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
  69.     int t = 1;
  70.     // cin >> t;
  71.     while(t--)
  72.         solve();
  73.     return 0;
  74. }
  75.  
Success #stdin #stdout 0.06s 13580KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/OkfrbL
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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