#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream> 
#include <random>
#include<map>
#include <iomanip>
#include <time.h>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
using namespace std;
#define eps 0.000000001
#define LONG_INF 10000000000000000
#define GOLD 1.61803398874989484820458
#define MAX_MOD 1000000007
#define REP(i,n) for(long long i = 0;i < n;++i)
long long hoge[20000000] = {};
int main() {
#define int long long
	long long a, b;
	cin >> a >> b;
	hoge[2] = 1;
	hoge[3] = 1;
	for (int i = 4;i <= a;++i) {
		hoge[i] = hoge[i - 1] + hoge[i - 2];
		hoge[i] %= b;
	}
	cout << hoge[a] << endl;
	return 0;
}