#include <bits/stdc++.h>
#define F first
#define S second
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
typedef pair<ll,P> PP;
ll n,h,w,m,a,b,ok,ok2,cnt,tmp,ans,dp[30][30],dp2[30][30],M;
string s[30];
vector<ll> v;
ll fib(ll a,ll b){
    if(a==1)return 0;
    if(a==2)return 1;
    return (fib(a-1,b)+fib(a-2,b))%b;
}
int main(void){
    cin>>n>>m;
    cout<<fib(n,m)<<endl;
}