func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     long long int n;     cin >> n;     if (n % 2 == 0) return cout <<  NO , 0;     long long int arr[2 * n + 1];     long long int a = 1, b = n + 1;     for (long long int i = 1; i < 2 * n + 1; i += 2) {       if (a % 2) {         arr[a++] = i;         arr[b++] = i + 1;       } else {         arr[b++] = i;         arr[a++] = i + 1;       }     }     cout <<  YES n ;     for (long long int i = 1; i < 2 * n + 1; i++) cout << arr[i] <<    ;   }   