#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>
#include <ctype.h>
using namespace std;

//#include<bits/stdc++.h>


int main() {
	
	unsigned long long int n, m;
	cin >> n >> m;
	long long int x = 0, y = 1;
	long long int c = 0;
	for (int i = 2; i < n; i++) {
		c = (x + y)%m;
		x = y;
		y = c;
		//cout << c << endl;
	}
	cout << c << endl;


	return 0;
}