#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep1(i, n) for (int i = 1; i < (int)(n+1); i++)
#define all(x) (x).begin(), (x).end()

//using mint = modint1000000007;
//using mint = modint998244353;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<ll, ll> PL;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;

const int INF = 1<<30;
const long long INFL = (ll)1<<60;
const double PI = 3.14159265358979;

int main() {
  int n, m;
  cin >> n >> m;
  vl f(n);
  f[0] = 0;
  f[1] = 1;
  for(int i=2;i<n;i++){
    f[i] = f[i-1] + f[i-2];
    f[i] %= m;
  }
  cout << f[n-1] << endl;
  return 0;
}