#ifdef _DEBUG
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;

#define fs(n) fixed << setprecision(n)
#define mp(a, b) make_pair(a, b)
#define all(x) x.begin(), x.end()
#define pdesc(t) t, vector<t>, greater<t>
using ll = long long;
using ld = long double;
#define query(t) while(t--)
#define aryin(a, n) for(int i = 0; i < n; i++) cin >> a[i];


#define mint modint

#define mtrx vector<vector<mint>>
mtrx mtrxMul(mtrx &a, mtrx &b) {
  mtrx res(a.size(), vector<mint>(b[0].size()));
  for(int i = 0; i < a.size(); i++){
    for(int j = 0; j < b[0].size(); j++){
      for(int k = 0; k < b.size(); k++){
        res[i][j] += a[i][k] * b[k][j];
      }
    }
  }
  return res;
}
mtrx mtrxPow(mtrx a, ll n){
  mtrx res(a.size(), vector<mint>(a.size()));
  for(int i = 0; i < a.size(); i++){
    res[i][i] = 1;
  }
  while(n > 0){
    if(n & 1) res = mtrxMul(a, res);
    a = mtrxMul(a, a);
    n >>= 1;
  }
  return res;
}
ostream& operator<< (ostream& os, const mint& v){
  os << v.val();
  return os;
}

int main(){
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);

  int n, m; cin >> n >> m;
  mint::set_mod(m);

  mtrx mx(2, vector<mint>(2, 1));
  mx[1][1] = 0;

  mtrx res = mtrxPow(mx, n - 2);
  cout << res[0][0] << endl;
}