//{{{
#include <bits/stdc++.h>
using namespace std;
#define rep(...) repN((__VA_ARGS__,rep3,rep2,loop,~))(__VA_ARGS__)
#define loop(n) rep2(_loop_,n)
#define rep2(i,n) rep3(i,0,n)
#define rep3(i,begin,end) for(int i=(int)(begin),i##_end=(int)(end);i<i##_end;++i)
#define repN(a) repX a
#define repX(a0,a1,a2,x,...) x
#define foreach(x,a) for(auto &x:a)
typedef long long ll;
const int MOD = 1e9+7;
//}}}

int main(){
	int n, m;
	cin >> n >> m;
	ll a = 0;
	ll b = 1;
	rep(i, n - 1){
		ll temp = a;
		a = b;
		b += temp;
		a %= m;
		b %= m;
	}
	cout << a << endl;
	return 0;
}