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Jun 18th, 2018
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  1. #include<stdio.h>
  2.  
  3. int kiemtra(int n){
  4. if(n<2) return 0;
  5. for(int i=2;i<n;i++){
  6. if(n%i==0) return 0;
  7. }
  8. return 1;
  9. }
  10.  
  11. int chuso(int n){
  12. while(n){
  13. if(!kiemtra(n%10)) return 0;
  14. n/=10;
  15. }
  16. return 1;
  17. }
  18. int tong(int n){
  19. int sum=0;
  20. while(n){
  21. sum+=n%10;
  22. n/=10;
  23. }
  24. if(!kiemtra(sum)) return 0;
  25. return 1;
  26. }
  27. int main(){
  28. int a,b;
  29. scanf("%d %d",&a,&b);
  30. int count=0;
  31. for(int i=a;i<=b;i++){
  32. if(kiemtra(i)&&chuso(i)&&tong(i)) count++;
  33. }
  34. printf("%d",count);
  35. }
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