#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    int N, M;
    cin >> N >> M;
    long fibonatti[max(N, 2)];
    fibonatti[0] = 0;
    fibonatti[1] = 1;
    for(int i = 2; i < N; i++){
        fibonatti[i] = (fibonatti[i - 1] + fibonatti[i - 2]) % M;
    }
    cout << fibonatti[N - 1] << endl;
}