#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
const long long INF = 1001001001;
const long long MOD = 1000000007;
const double EPS = 1e-10;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    ll n,m;
    cin>>n>>m;
    ll fib[2];
    fib[0]=1,fib[1]=0;
    for(int i=3;i<=n;i++){
        fib[i&1]+=fib[(i-1)&1];
        fib[i&1]%=m;
    }
    cout<<fib[n&1]<<endl;
}