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


long long MOD;

vector<vector<long long>> matdot(vector<vector<long long>>& A, vector<vector<long long>>& B){
    int n = A.size(), m = B.size(), l = B[0].size();
    vector<vector<long long>> ret(n, vector<long long>(l,0));
    for(int i=0; i<n; i++)
        for(int j=0; j<l; j++)
            for(int k=0; k<m; k++)
                (ret[i][j] += A[i][k]*B[k][j]) %= MOD;
    return ret;
}

void matpow(vector<vector<long long>>& dp, vector<vector<long long>>& mat, long long k){
    while(k){
        if(k & 1) dp = matdot(mat, dp);
        mat = matdot(mat, mat);
        k >>= 1;
    }
}

int main(){
    long long N; cin >> N >> MOD;

    vector<vector<long long>> dp(2,vector<long long>(1)), mat(2,vector<long long>(2,0));
    mat[0][0] = mat[0][1] = mat[1][0] = 1;
    dp[0][0] = 1; dp[1][0] = 0;
    matpow(dp, mat, N-2);
    cout << dp[0][0] << endl;
}