func_code_string: #include <bits/stdc++.h>   using namespace std;   void imprimirVector(vector<long long> v) {     if (!v.empty()) {       int p = v.size();       cout <<  [ ;       for (int i = 0; i < (int)(p - 1); i++) cout << v[i] <<  , ;       cout << v[p - 1] <<  ]  << endl;     } else       cout <<  []  << endl;   }   long long toNumber(string s) {     long long Number;     if (!(istringstream(s) >> Number)) Number = 0;     return Number;   }   string toString(long long number) {     ostringstream ostr;     ostr << number;     return ostr.str();   }   int main() {     ios_base::sync_with_stdio(0);     unsigned long long n;     cin >> n;     cout << (n * (n - 1) * (n - 2) * (n - 3) * (n - 4) / 120) * n * (n - 1) *                 (n - 2) * (n - 3) * (n - 4)          << endl;     return 0;   }   