#include <bits/stdc++.h>
//#include<atcoder/all>
//using namespace atcoder;
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> VI;
typedef vector<ll> VL;
typedef vector<vector<int> > VII;
typedef vector<vector<ll> > VLL;
typedef vector<string> VS;
typedef vector<bool> VB;
//#define int long long 
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pis pair<int,string>
#define psi pair<string,int>
#define rep(i,num,n) for(int i=num;i<(int)(n);i++) //for_loop
#define REP(i,n) for(int i=0;i<(int)(n);i++)
#define rrep(i,num,n) for(int i=num-1;i>=(int)(n);i--) //reverse_for>
#define in(x,a,b) (a<=x && x<b)//範囲
#define reo return 0
#define all(v) v.begin(),v.end()
#define INF 2000000000000000000
#define INFL 4000000000000000000
//#define ten(x) ((int)1e##x)
//#define tenll(x) ((ll)1e##x)

#define PI 3.14159265358979
#define mint modint1000000007

//#define mint modint998244353
bool chmin(ll &a,ll b){if(a>b){a=b;return true;}return false;}
bool chmax(ll &a,ll b){if(a<b){a=b;return true;}return false;}
bool chmin(int &a,int b){if(a>b){a=b;return true;}return false;}
bool chmax(int &a,int b){if(a<b){a=b;return true;}return false;}

int main(){
    ll m,n;
    cin>>n>>m;
    vector<ll>fibo(n+10);
    fibo[0]=fibo[1]=0;
    fibo[2]=1;
    rep(i,3,n+1){
        fibo[i]=fibo[i-1]+fibo[i-2];
        fibo[i]%=m;
    }
    cout<<fibo[n];
    
}