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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. const int N = 1e6;
  4.  
  5. bool prime_poo(long long prime){
  6.     if (prime <= 1)return false;
  7.     for (long long p = 2; p < prime; p++){
  8.         if (prime % p == 0){
  9.             return false;
  10.         }
  11.     }
  12.     return true;
  13. }
  14.  
  15. signed main(){
  16.     ios::sync_with_stdio(false);
  17. 	freopen("SODER.INP","r",stdin);
  18. 	freopen("SODER.OUT","w",stdout);
  19.  
  20.     long long n, a[N];
  21.     string s;
  22.     cin >> n;
  23.     for (long long i = 0; i < n; i++){
  24.         cin >> a[i];
  25.         long long b = a[i];
  26.         while(b > 0){
  27.             if (prime_poo(b) == false){
  28.                 break;
  29.             }
  30.             else if (b/10 == 0){
  31.                 cout << a[i];
  32.                 if (i+1 != n){
  33.                     cout << endl;
  34.                 }
  35.                 break;
  36.             }
  37.             else {
  38.                     b/=10;
  39.             }
  40.         }
  41.     }
  42. }
  43.  
Success #stdin #stdout 0.01s 5276KB
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https://ideone.com/9LvmRG
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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