#include <math.h>
#include <ctype.h>
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, n) for (int i = a; i < n; i++)
#define REP(i, n) for(int i = 0; i < n; i++)
struct omt{omt(){ios::sync_with_stdio(false);cin.tie(0);}}star;

int main(){
    int n, m;
    cin >> n >> m;
    
    
    vector<int> A(n);
    n--;
    A[0] = 0;
    A[1] = 1;

    FOR(i, 2, n + 1){
        A[i] = (A[i - 1] + A[i - 2]) % m;
    }
    cout << A[n] % m << endl;


    return 0;
}