#include<iostream>
#include<string>
#include<vector>
#include <algorithm>
#include <cmath>
using namespace std;
int N;
long long M;
int memo[5000000];
int func(int n){
    if(n<=1) return 1;
    if(memo[n] != 0) return memo[n];
    return memo[n] = func(n-1) + func(n-2);
}
int main() {    
    cin >> N >> M;
    memo[1] = 0;
    memo[2] = 1;
    memo[3] = 1;
    cout << func(N)%M << endl;
    return 0;
}