import java.util.Scanner;
public class Main {
public static void main(String[] args){
Scanner cin=new Scanner(System.in);
int n=cin.nextInt();
int an=fun(n);
System.out.print(an%998244353);
}
private static int fun(int n) {
// TODO Auto-generated method stub
if(n==0){
return 0;
}
if(n==1){
return 1;
}
return fun(n-1)+fun(n-2);
}
}
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