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

int main() {
    ll n, m;
    cin>>n>>m;
    ll a=0;
    ll b=1;
    for (int i=3; i<=n; i++) {
        ll t = b;
        b = (a+b)%m;
        a = t;
    }
    cout << b << endl;
    return 0;
}