func_code_string: #include <bits/stdc++.h>   using namespace std;   struct _ {     _() { ios_base::sync_with_stdio(0); }   } _;   template <class A, class B>   ostream &operator<<(ostream &o, pair<A, B> t) {     o <<  (  << t.first <<  ,   << t.second <<  ) ;     return o;   }   template <class T>   string tostring(T first, int len = 0, char c =  0 ) {     stringstream ss;     ss << first;     string r = ss.str();     if (r.length() < len) r = string(len - r.length(), c) + r;     return r;   }   template <class T>   void PV(T a, T b, int n = 0, int w = 0, string s =    ) {     int c = 0;     while (a != b) {       cout << tostring(*a++, w,    );       if (a != b && (n == 0 || ++c % n))         cout << s;       else         cout << endl;     }   }   template <class T>   inline bool chmin(T &a, T b) {     return a > b ? a = b, 1 : 0;   }   template <class T>   inline bool chmax(T &a, T b) {     return a < b ? a = b, 1 : 0;   }   const long long linf = 0x3f3f3f3f3f3f3f3fLL;   const int inf = 0x3f3f3f3f;   const int mod = int(1e9) + 7;   const int N = 111111;   vector<int> prime;   bool isp[N];   vector<int> oddPrime;   void generatePrime(int n = 1000000) {     memset(isp, 1, sizeof(isp));     ;     isp[0] = isp[1] = 0;     for (int i = 2; i <= n; i++) {       if (!isp[i]) continue;       prime.push_back(i);       for (int j = i + i; j <= n; j += i) {         isp[j] = 0;       }     }   }   int cnt[10000];   long long cc;   inline int isPrime(int *a, int n) {     int r = 0;     for (int i = 0; i < n; i++) r = 10 * r + a[i];     return isp[r];   }   int D[5][5], n, res;   void dfs(int r, int c) {     if (n <= 4 && r == n - 1) {       res++;       return;     }     if (n == 5 && r == n - 2) {       res += cnt[D[3][0] * 1000 + D[3][1] * 100 + D[3][2] * 10 + D[3][4]];       return;     }     for (int i = 0; i < 10; i++) {       D[r][c] = D[c][r] = i;       if (c == n - 2) {         if (isPrime(D[r], n)) dfs(r + 1, r + 1);       } else {         dfs(r, c + 1);       }       if (D[r][n - 1] == 2) break;     }   }   int main() {     generatePrime(100000);     for (int i : prime) {       int t = i;       int ok = 1;       while (t > 0) {         if (t % 10 != 2 && t % 2 == 0) ok = 0;         t /= 10;       }       if (ok) oddPrime.push_back(i);       int j = i / 100 * 10 + i % 10;       cnt[j]++;     }     int T;     cin >> T;     while (T--) {       int first;       cin >> first;       string s = tostring(first);       n = s.length();       res = 0;       for (int second : oddPrime) {         if (tostring(second).size() > n) continue;         for (int i = 0; i < n; i++) D[0][i] = D[i][0] = s[i] -  0 ;         string os = tostring(second, n);         if (os[0] != s[n - 1]) continue;         int ok = 1;         for (int i = 0; i < n; i++) {           int t = os[i] -  0 ;           D[i][n - 1] = D[n - 1][i] = t;           if (t % 2 == 0 && D[0][i] != 0) ok = 0;         }         if (ok) dfs(1, 1);       }       cout << res << endl;     }     cerr <<  [               0                ->                clock()               :            << 1e3 * (clock() - 0) / CLOCKS_PER_SEC <<  ms] n ;     ;     return 0;   }   