#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
string solve(string s){
  string res,t;
  char c='A';
  for(Int i=0;i<(Int)s.size();i++){
    if(!isalpha(s[i])){
      res+=s[i];
      continue;
    }
    while(c!=s[i]){
      res+=c++;
      if(c>'Z') c='A';
    }
    c++;
    if(c>'Z') c='A';
  }
  return res;
}

signed main(){
  string s{"ABCDEFGHIJKLMNOPQRSTUVWXZABCDEFGHIJKLMNPQRSTVWXYZ_BCDEFGHIJKLMNOPQSTUVWXYZABCDFGHIJKLMN OPQRSTUVWXYZ_ABCDEFHJKLMNOPQRSTUWXYZABCDFGHIJKLMOPQRSTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVXYZAB CDEFGHIJKLMNPQRSTUVWXYZ_ABCDEFGHJKLMOPQRSUVWXYZABCDFHIJKLMNOPQRSTUVWXYZABCDFGHIJKLMNOPQ TUVWXYZ_ABCDEFGHIJKLMOPQRSTUVWXYZ_BCDEFGHIJKLMOPQRSTUVWXYZABCEFGHIJKLMNOPQRSTUVWXYZ_ABC DEFGHIJKLNOPQRSTUVWXYZ._ABCDEFGHIJKLMNOPQRSTUVWXZABCDEFGHIJKLMNPQRSTVWXYZABCDEFGHIJKLMN OPQSTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVWXYZBCDEFGHIJKLMNOPQRTUVWXYZABCDEFGHIJLMNOPQRSTUVWXYZ_ ABCDEFGHJKLMNOPQRTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVWXYZABCDEFGHIJKLMNPQRSTUVWXYZ_ABCDEGHJKLM OPQRSTUVWXYZABCEFGHIJKLMNOPQRSTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVWXYZABCDEFGIJKLMNOPQRSTUVWXY ZABCDFGHIJKLMNOPQRSTUVWXYZ_ABCDEGHIJKLMNOPQRSTUVWXYZBDEFGHIJKLMNOPQRSUVWXYZABCDEFGHIJKL MNPQSTUVWXYZABCDEFGHJKLMNOPQRSTUVWXYZBCDEFGHIJKMNOPQRSTUVWXYZ_ABCDEFGHIJKLMNPQRSTUVWXYZ ABCDEGHIJKLMNOPQRSTUVWXYZ_ABCDEFGHIJKLMOPQRSTUVWXYZ,_ABCDEFGHIJKLNPQRSTUVWXYZABCEFGHIJK LMNOPQRSTVWXYZABCDEFGHIJKMNPQRSTUVWXYZ_ABCDEFGHIJKLNOPQRSTUVWXYZ."};
  //cout<<solve(s)<<endl;

  Int n,m;
  cin>>n>>m;
  if(n>=m){
    cout<<0<<endl;
    return 0;
  }
  Int ans=1;
  for(Int i=1;i<=n;i++){
    ans*=i;
    ans%=m;
  }
  cout<<ans<<endl;
  return 0;
}