fork download
copy 
  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. long long a, b, i, dem;
  4. long long daoso(long long m)
  5. {
  6.     long long d=m, dao=0;
  7.     while(d>0)
  8.     {
  9.         dao=dao*10+d%10;
  10.         d/=10;
  11.     }
  12.     return dao;
  13. }
  14. long long demuoc(long long m)
  15. {
  16.     long long dem=0;
  17.     for(long i=1; i*i<=m; i++)
  18.     {
  19.         if(m%i==0)
  20.         {
  21.             dem++;
  22.             if(i!=m/i) dem++;
  23.         }
  24.     }
  25.     return dem;
  26. }
  27. bool nt(long long x)
  28. {
  29.     if(x<2) return false;
  30.     for(long long i=2; i*i<=x; i++)
  31.         if(x%i==0) return false;
  32.     return true;
  33. }
  34. int main()
  35. {
  36.     cin>>a>>b;
  37.     dem=0;
  38.     for(long i=a;i<=b; i++)
  39.     {
  40.         if(daoso(i)==i&&nt(demuoc(i)))
  41.             dem++;
  42.     }
  43.     cout<<dem;
  44. }
  45.  
Success #stdin #stdout 0.01s 5308KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/aov8ei
language:
C++ (gcc 8.3)
created:
11 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!