#include <bits/stdc++.h>
using namespace std;

#define FOR(i,l,r) for(int i = (int) (l);i < (int) (r);i++)
template<typename T> bool chmax(T& a,const T& b){ return a < b ? (a = b,true) : false; }
template<typename T> bool chmin(T& a,const T& b){ return b < a ? (a = b,true) : false; }
typedef long long ll;

ll N,M;

int main()
{
	scanf("%lld%lld",&N,&M);

	ll curr = 1,prev = 0;
	FOR(i,0,N - 2){
		ll t = (curr + prev) % M;
		prev = curr;
		curr = t;
	}
	printf("%lld\n",curr);

	return 0;
}