func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int MOD = 1000000007;   long long int MOD1 = 998244353;   mt19937 tw(chrono::high_resolution_clock::now().time_since_epoch().count());   unsigned long long power(unsigned long long x, int y, int p) {     unsigned long long res = 1;     x = x % p;     while (y > 0) {       if (y & 1) res = (res * x) % p;       y = y >> 1;       x = (x * x) % p;     }     return res;   }   void solve() {     long long int n;     cin >> n;     long long int res = 1;     for (int i = 1; i <= n; i++) {       res = (res * i) % MOD;     }     long long int p = power(2, n - 1, MOD);     res = (res - p + MOD) % MOD;     cout << res <<   n ;   }   signed main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     solve();   }   