#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    ll n,m;
    cin>>n>>m;
    ll f1=0,f2=1;
    for(int i=2;i<n;i++) {
        ll nx=(f1+f2)%m;
        f1=f2;
        f2=nx;
    }
    cout<<f2%m<<endl;
    return 0;
}