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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.  
  18.     long long n, a[N];
  19.     string s;
  20.     cin >> n;
  21.     for (long long i = 0; i < n; i++){
  22.         cin >> a[i];
  23.         long long b = a[i];
  24.         while(b > 0){
  25.             if (prime_poo(b) == false){
  26.                 break;
  27.             }
  28.             else if (b/10 == 0){
  29.                 cout << b;
  30.                 if (i+1 != n){
  31.                     cout << endl;
  32.                 }
  33.                 break;
  34.             }
  35.             else {
  36.                     b/=10;
  37.             }
  38.         }
  39.     }
  40. }
  41.  
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/tnLST5
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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