import java.util.Scanner;
import java.util.stream.IntStream;

public class Main{
	static IntStream REPS(int v){return IntStream.range(0,v);}
	static IntStream REPS(int l,int r){return IntStream.rangeClosed(l,r);}
	static IntStream INS(int n) {return REPS(n).map(i->getInt());}
	static Scanner s=new Scanner(System.in);
	static int getInt(){return Integer.parseInt(s.next());}

	public static void main(String[]$){
		int n=getInt(),m=getInt();
		long[]r=new long[n];
		r[0]=0;
		r[1]=1;
		for(int i=2;i<n;++i)
			r[i]=(r[i-1]+r[i-2])%m;
		System.out.println(r[n-1]);
	}
}