import sys input = sys.stdin.buffer.readline sys.setrecursionlimit(10 ** 7) class fenwick_tree(object): def __init__(self, n): self.n = n self.log = n.bit_length() self.data = [0] * n def __sum(self, r): s = 0 while r > 0: s += self.data[r - 1] r -= r & -r return s def add(self, p, x): """ a[p] += xを行う""" p += 1 while p <= self.n: self.data[p - 1] += x p += p & -p def sum(self, l, r): """a[l] + a[l+1] + .. + a[r-1]を返す""" return self.__sum(r) - self.__sum(l) def lower_bound(self, x): """a[0] + a[1] + .. a[i] >= x となる最小のiを返す""" if x <= 0: return -1 i = 0 k = 1 << self.log while k: if i + k <= self.n and self.data[i + k - 1] < x: x -= self.data[i + k - 1] i += k k >>= 1 return i U = 10 ** 5 + 100 N, K = map(int, input().split()) bit = fenwick_tree(U) for _ in range(N): w = int(input()) if w > 0: if bit.sum(w, U) < K: bit.add(w, 1) else: w = -w if bit.sum(w, w + 1): bit.add(w, -1) print(bit.sum(0, U))