func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cout << 2000 << endl;     for (int i = 1; i <= 1000; ++i) cout << i <<     << 1 <<     << i <<   2 n ;     for (int i = 1000; i >= 1; --i) cout << i <<     << 1 <<     << i <<   2 n ;   }   