#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
#define MOD % 1000000007
using namespace std;
typedef long long LL;
typedef vector<int> VI;


int main() {
	int n, m;
	cin >> n >> m;
	LL f1 = 0, f2 = 1, f3 = f1 + f2;
	FOR(i, 3, n) {
		f1 = f2;
		f2 = f3;
		f3 = (f1 + f2) % m;
	}
	cout << f3 << endl;
	return 0;
}