#include <stdio.h>
#include <stdlib.h>

int sB(int *Arr, int key, int start, int end);

int main(int argc, char *argv[]) {
    int N, K, *Arr, i, result;

    scanf("%d %d", &N, &K);

    Arr = (int*)malloc(sizeof(int) * N);

    for (i = 0; i < N; i++)
        scanf("%d", Arr + i);

    result = sB(Arr, K, 0, N - 1);

    printf("%d\n", result);

    free(Arr);

    return 0;
}

int sB(int *Arr, int key, int start, int end) {
    int mid;

    if (start > end)
        return end;

    mid = (end + start) / 2;

    if (Arr[mid] == key)
        return mid;
    else if (Arr[mid] < key)
        return sB(Arr, key, mid + 1, end);
    else
        return sB(Arr, key, start, mid - 1);
}