N,K=map(int,raw_input().split());M=10**6+1;B=[0]*M;C=[0]*M
def A(a,w):
	while a<M:B[a]+=w;a+=a&(-a)
def S(a):
	r=0
	while a>0:r+=B[a];a-=a&(-a)
	return r
while N:
	N-=1;w=input()
	if w>0:
		if S(M-w)<K:A(M-w,1);C[w]+=1
	else:
		if C[-w]>0:A(M+w,-1);C[-w]-=1
print S(M-1)