//Normal

#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

void print(auto a){
  cout << a;
}

void prints(auto a){
  cout << a << " ";
}

void prints(){
  cout << " ";
}

void printl(auto a){
  cout << a << endl;
}

void printl(){
  cout << endl;
}

void fix(int n){
  cout << fixed << setprecision(n);
}

int main(){
  ll N, M; cin >> N >> M;
  vector<ll> X(1e7, 0);
  X[1] = 0;
  X[2] = 1;
  
  for(int i = 3; i <= N; i++){
    X[i] = (X[i-2]+X[i-1])%M;
  }
  
  printl(X[N]);
  
  return 0;
}