func_code_string: #include <bits/stdc++.h>   bool fun(long long a);   using namespace std;   int main() {     long long num, num1, num2;     cin >> num;     if (num % 2 == 0) {       num1 = num / 2;       num2 = num / 2;       while (!fun(num1) || !fun(num2)) {         num1 -= 1;         num2 += 1;       }     } else {       num1 = num / 2;       num2 = num / 2 + 1;       while (!fun(num1) || !fun(num2)) {         num1 -= 1;         num2 += 1;       }     }     cout << num1 <<     << num2;   }   bool fun(long long a) {     int c = 0;     for (int i = 2; i < a; i++) {       if (a % i == 0) {         c = 1;         break;       }     }     return c == 1;   }   