#include <iostream>
#include <stdio.h>
#include <string>
#include <list>
#include <vector>
#include <algorithm>

#define rep(i,n) for(int i = 0;i < n;i++)
#define REP(i,n,k) for(int i = n;i < k;i++)
#define P(p) cout << (p) << endl;//print
typedef long long ll;
using namespace std;


int main(){
    cin.tie(0);
   	ios::sync_with_stdio(false);
    
    ll n,m;
    cin >> n >> m;
    int now =0;
    int past =1;
    rep(i,n-1){
        ll tmp=now;
        now = (now + past)%m;
        past = tmp;
    }
    P(now);
}