func_code_string: #include <bits/stdc++.h>   using namespace std;   int log(int x) { return 32 - __builtin_clz(x) - 1; }   int log(long long x) { return 64 - __builtin_clzll(x) - 1; }   int n;   int main() {     cin >> n;     if (n % 2 == 0) {       cout <<  NO ;       return 0;     }     cout <<  YES n ;     bool add = false;     for (int i = 1; i < 2 * n; i += 2, add = !add) cout << i + add <<    ;     add = true;     for (int i = 1; i < 2 * n; i += 2, add = !add) cout << i + add <<    ;   }   