# include <cstdio>
# define MAX 5005
# define mod 2000003

using namespace std;

int n,k,nrsol,i,z,j,nr1,nr2;
int a[MAX];

int main ()

{
    freopen("sandokan.in","r",stdin);
    freopen("sandokan.out","w",stdout);

    scanf("%d %d\n",&n, &k);

    for (i = 1; i <= n; i++)
        scanf("%d ",&a[i]);


    if (k == n) printf("%d",1);
    if (k == n-1) printf("%d",k-1);

/*
    k--;
    z = n % k;
    if (z == 0) z = k;

    for (i = 1; i < n; i++)
        for (j = 1; j <= i && j <= z; j++)
            a[j] = (a[j-1] + a[j]) % mod;

    printf("%d",a[z]);
    */
    return 0;
}