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

long mod;

struct Matrix {
    int sz;
    long x[2][2];
};

Matrix multiply_matrix(Matrix A, Matrix B){
    Matrix C;
    C.sz = A.sz;
    for(int i = 0 ; i < C.sz; i++){
        fill(C.x[i],C.x[i]+C.sz,0);
    }

    for(int i = 0 ; i < A.sz ; i++){
        for(int j = 0 ; j < B.sz ; j++){
            for(int k = 0 ; k < A.sz ; k++){
                C.x[i][j] += A.x[i][k] * B.x[k][j];
                C.x[i][j] %= mod;
            }
        }
    }
    return C;
}

int main(){
    long n;
    cin >> n;
    n-=2;
    cin >> mod;
    Matrix ANS;
    ANS.sz = 2;
    ANS.x[0][0] = 1; ANS.x[0][1] = 0;
    ANS.x[1][0] = 0; ANS.x[1][1] = 1;
    Matrix A;
    A.sz = 2;
    A.x[0][0] = 0; A.x[0][1] = 1;
    A.x[1][0] = 1; A.x[1][1] = 1;
    for(int i = 0 ; i < 63 ; i++){

        if((n & (1LL << i)) > 0LL){
            ANS = multiply_matrix(ANS,A);
        }
        A = multiply_matrix(A,A);
    }
    cout << ANS.x[1][1] << endl; 

}