func_code_string: #include <bits/stdc++.h>   using namespace std;   long long rr[] = {0, 1, 1, 1, 0, -1, -1, -1};   long long cc[] = {1, 1, 0, -1, -1, -1, 0, 1};   const long long mod = 1e9 + 7;   const long long N = 300050;   long long m, fact[N];   void pre() {     fact[0] = 1;     for (long long i = 1; i < N; i++) {       fact[i] = (fact[i - 1] * i) % m;     }   }   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     long long test = 1;     while (test--) {       long long n;       cin >> n >> m;       pre();       long long ans = 0;       for (long long i = 1; i <= n; i++) {         long long x = fact[n - i + 1] * (n - i + 1) % m;         x = (x * fact[i]) % m;         ans = (ans + x) % m;       }       cout << ans <<   n ;     }     return 0;   }   