func_code_string: #include <bits/stdc++.h>   int main() {     int n;     while (std::cin >> n) {       if (n % 2 == 0) {         std::cout << -1 << std::endl;         continue;       }       std::vector<int> a(n), b(n), c(n), was(n);       for (int i = 0; i < n; ++i) {         a[i] = i;         b[i] = (i + 1) % n;         c[i] = (a[i] + b[i]) % n;         assert(!was[c[i]]);         was[c[i]] = 1;       }       for (auto it : a) {         std::cout << it <<    ;       }       std::cout << std::endl;       for (auto it : b) {         std::cout << it <<    ;       }       std::cout << std::endl;       for (auto it : c) {         std::cout << it <<    ;       }       std::cout << std::endl;     }     return 0;   }   