import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        if(!sc.hasNextInt()){
            System.out.println("Invalid input");
            return;
        }
        String input=sc.nextInt();
        String[] parts=input.split("");
        int n=sc.nextInt();
        if(n<0){
            System.out.println("3");
            return;
        }
        int[] arr=new int[n];
        for(int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        int temp=sc.nextInt();
        int result=-1;
        for(int i=0;i<n;i++){
            for(int j=i+1;j<n;j++){
                if(arr[i]==arr[j]){
                    //System.out.print()
                    temp=arr[i];
                    arr[i]=arr[j];
                    arr[j]=temp;
                }
            }
        }
       // System.out.println(temp);
        System.out.println("1");
    }
}