func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     cout << n / 2 << endl;     if (n % 2) {       while (n > 3) {         cout << 2 <<    ;         n -= 2;       }       cout << 3;     } else {       while (n) {         cout << 2 <<    ;         n -= 2;       }     }     cout << endl;   }   