import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int x=sc.nextInt();
        int[] arr=new int[n];
        for(int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        int low=0,high=n-1;
        while(low<=high){
            int mid=(low+high)/2;
            if(arr[mid]==x){
                System.out.println(mid);
                break;
            }
            else if(arr[mid]<x){
                low=mid+1;
            }
            else{
                high=mid-1;
            }
        }
    }
}