n,k=map(int,input().split())
p=list(map(int,input().split()))
p.sort(reverse=True)
ans=0
if k==n:
    print(k)
elif p[k-1]==p[k]:
    for i in range(k):
        if p[i]==p[k-1]:
            print(i)
            break
else:
    print(k)