func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int n;   long long int f(long long int x) {     long long int sq = sqrt(x);     for (long long int i = 2; i <= sq; i++)       if (x % i == 0) return 0;     return 1;   }   int main() {     cin >> n;     if (f(n)) {       cout << 1 << endl << n << endl;       return 0;     }     cout << 3 << endl;     cout << 3 <<    ;     n -= 3;     for (long long int i = 2; i < n; i++) {       if (f(i) && f(n - i)) return cout << i <<     << n - i << endl, 0;     }   }   