#include <stdio.h>
#include <stdlib.h>
#define N 100
int Search_Bin_Recursive(int a[], int n, int key);
int main()
{
    int i,a[N],key;
    int n;
    scanf("%d%d",&n,&key);
    for(i=1;i<=n;i++){
      scanf("%d",&a[i]);
    }
    int location=Search_Bin_Recursive(a, n,key);
    printf("%d",location);
    return 0;
}
int Search_Bin_Recursive(int a[], int n, int key)//۰
{
     int low=1,high=n;
     int mid;
    while(low<=high)
    {
        mid=(low+high)/2;
        if(key==a[mid])
        return mid;
        else if(key<a[mid])
            high = mid-1;
        else low=mid+1;
    }
       return 0;
}