#include<iostream>
using namespace std;


int N, M;

void read() {
    cin >> N >> M;
}


void work() {
    int a = 0;
    int b = 1;
    for (int i = 0; i < N - 1; ++i) {
        int newB = (1LL * a + b) % M;
        a = b;
        b = newB;
    }
    cout << a << endl;
}


int main() {
    read();
    work();
    return 0;
}