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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. bool prime(int x) {
  5.     int i = 2;
  6.     if (x < 2) {
  7.         return false;
  8.     }
  9.     while (i < x) {
  10.         if (x % i == 0) {
  11.             return false;
  12.         }
  13.         i++;
  14.     }
  15.     return true;
  16. }
  17.  
  18. int inverse(int x) {
  19.     int t = 0;
  20.     while (x) {
  21.         t = t * 10 + x % 10;
  22.         x /= 10;
  23.     }
  24.     return t;
  25. }
  26.  
  27. int main() {
  28.     int x;
  29.     cin >> x;
  30.     cout << (prime(x) && inverse(prime(x)) ? "DA" : "NU");
  31. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin 
31
stdout 
DA
https://ideone.com/nvMn41
language:
C++ (gcc 8.3)
created:
13 days ago
visibility:
public

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