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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int check_prime(long num){
  4.     if(num == 1) return 0;
  5.     for(long j = 2; j*j <= num; j++){
  6.         if(num%j == 0) return 0;
  7.     }
  8.     return 1;
  9. }
  10. int check_digits(long num,int arr[]){
  11.     while(num){
  12.         int temp = num%10,flag = 0;
  13.         for(int i = 0; i < 4; i++){
  14.             if(temp == arr[i]) flag = 1;
  15.         }
  16.         if(!flag) return 0;
  17.         num /= 10;
  18.     }
  19.     return 1;
  20. }
  21. int main(void){
  22.     long first;
  23.     long last,count = 0;
  24.     cin>>first>>last;
  25.     int arr[] = {2,3,5,7};
  26.     for(long i = first; i <= last; i++){
  27.         int flag = check_prime(i);
  28.         if(flag) flag = check_digits(i,arr);
  29.         if(flag) count++;
  30.     }
  31.     cout<<count;
  32.     return 0;
  33. }
Success #stdin #stdout 0s 16048KB
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https://ideone.com/Sa8VID
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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