#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i=0; i<n; i++)
using i64 = int64_t;

vector<vector<i64>> mat_mul_mod(vector<vector<i64>> a, vector<vector<i64>> b,i64 mod){
    vector<vector<i64>> res(2,vector<i64>(2,0));
    res.at(0).at(0) = ((a.at(0).at(0)*b.at(0).at(0))%mod + (a.at(0).at(1)*b.at(1).at(0))%mod)%mod;
    res.at(0).at(1) = ((a.at(0).at(0)*b.at(0).at(1))%mod + (a.at(0).at(1)*b.at(1).at(1))%mod)%mod;
    res.at(1).at(0) = ((a.at(1).at(0)*b.at(0).at(0))%mod + (a.at(1).at(1)*b.at(1).at(0))%mod)%mod;
    res.at(1).at(1) = ((a.at(1).at(0)*b.at(0).at(1))%mod + (a.at(1).at(1)*b.at(1).at(1))%mod)%mod;
    return res;
}

int main(){
    i64 N,M;
    cin >> N >> M;
    i64 key=N-2;
    vector<vector<i64>> mat_key = {
        {0,1},
        {1,1}
    };
    vector<vector<i64>> mat_res = {
        {1,0},
        {0,1}
    };
    
    while (key>0){
        if (key&1) mat_res = mat_mul_mod(mat_key, mat_res, M);
        key = key >> 1;
        mat_key = mat_mul_mod(mat_key,mat_key, M);
    }

    cout << mat_res.at(1).at(1) << endl;
    

}