#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)n;i++)
using namespace std;
using ll = long long;
using P = pair<int, int>;

int main() {
    ll n, m;
    cin >> n >> m;
    vector<ll> ans(n, 0);
    ans[0] = 0, ans[1] = 1;
    for (int i = 2; i < n; i++) {
        ans[i] = ans[i - 1] + ans[i - 2];
        ans[i] %= m;
    }
    cout << ans[n - 1] << endl;
    return 0;
}