func_code_string: #include <bits/stdc++.h>   using namespace std;   int g[20] = {0,         1, 0,         18, 0,         1800, 0,         670320, 0,                734832000, 0, 890786230, 0,  695720788, 0,    150347555, 0};   int main() {     int n;     cin >> n;     cout << g[n] << endl;   }   