#include <iostream>
#include <algorithm>
#include <queue>
#include <vector>
#include <map>
#include <string>

using namespace std;

void solve();

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    solve();
}

void solve() {
    long long int n,m;
    cin >> n >> m;
    long long int a1 = 0 % m;
    long long int a2 = 1 % m;
    for(int i = 3; i <= n; i++) {
        long long int tmp = (a1 + a2) % m;
        a1 = a2;
        a2 = tmp;
    }
    cout << a2 << endl;

    
}