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import java.util.ArrayList;
import java.util.Queue;
import java.util.Scanner;
import java.util.concurrent.PriorityBlockingQueue;
public class Main {
    public static void main(String args[]){
        Main test=new Main();
        test.start();
    }
    public void start(){
        Scanner scan=new Scanner(System.in);
        int N=scan.nextInt();
        int M=scan.nextInt();
        int K=scan.nextInt();
        ArrayList<Integer> list=new ArrayList<Integer>();
        int array[]=new int[N+1];
        for(int i=0;i<M;i++){
            int a=scan.nextInt();
            array[a]=-1;
        }
        Queue<B> queue=new PriorityBlockingQueue<B>();
        int isK=0;
        int start=0;
        for(int i=1;i<N+1;i++){
            
            if(array[i]==-1){
                if(isK==0){
                    start=i;
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