func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     std::vector<int> v;     for (int i = 0; i < n / 2; i++) {       v.push_back(2);     }     if (n % 2 != 0) {       v.pop_back();       v.push_back(3);     }     cout << v.size() << endl;     for (auto a : v) cout << a <<    ;     return 0;   }   