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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N, M;
    cin >> N >> M;
    vector<long long> F(N);
    F[1] = 1;
    for (int i = 2; i < N; i++) {
        F[i] = (F[i - 1] + F[i - 2]) % M;
    }
    cout << F[N - 1] << '\n';
    return 0;
}