#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(ll i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  ll n,m;cin>>n>>m;
  vector<ll> hoge(n);
  hoge[0]=0;
  hoge[1]=1;
  rep2(i,2,n){
    hoge[i]=(hoge[i-1]+hoge[i-2])%m;
  }
  //rep(i,n)cout<<i<<" "<<hoge[i]<<endl;
  cout<<hoge[n-1]%m<<endl;
}