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

int main()
{
    long n, m;
    cin >> n >> m;
    long prev = 0, current = 1;
    for (long i = 3; i <= n; i++) {
        long w = (current + prev) % m;
        prev = current;
        current = w;
    }
    cout << current << endl;
}