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

#define mat vector<vector<long long>>

mat matmul(mat &a, mat &b, long long M) {
    mat res(a.size(), (vector<long long>)b[0].size());
    for (int i = 0; i < a.size(); i++) {
        for (int j = 0; j < b[0].size(); j++) {
            for (int k = 0; k < b.size(); k++) {
                (res[i][j] += a[i][k] * b[k][j]) %= M;
            }
        }
    }
    return res;
}

mat matpow(mat &a, long long n, long long M) {
    mat res(a.size(), (vector<long long>)a.size());
    for (int i = 0; i < a.size(); i++) {
        res[i][i] = 1;
    }
    while (n > 0) {
        if (n & 1) res = matmul(a, res, M);
        a = matmul(a, a, M);
        n >>= 1;
    }
    return res;
}

int main() {
    long long N, M;
    cin >> N >> M;
    mat res(2, (vector<long long>)2);
    res = {{1, 1}, {1, 0}};
    res = matpow(res, N - 3, M);
    cout << (res[0][0] + res[0][1]) % M << endl;
}