#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif

#include<bits/stdc++.h>
using namespace std;
using ll = long long;

#define YES cout<<"Yes"<<endl
#define NO cout<<"No"<<endl
#define YN {cout<<"Yes"<<endl;}else{cout<<"No"<<endl;}// if(a==b)YN;
#define NO2 cout<<-1<<endl

#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define rrep(i, n) for (int i=int(n)-1; i>=0; --i)
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()

int main() {
    int N, M;
    cin >> N >> M;
    ll an=0, an1=0, an2=1;
    for (int i=2; i<N; i++) {
        an = an1;
        an1 = an2;
        an2 = (an+an1)%M;
    }
    cout << an2 << endl;
}