import sys


def input(): return sys.stdin.readline().rstrip()


class Seg:
    def __init__(self, N):
        self.N = 1 << (N.bit_length())
        self.arr = [0]*(2*self.N)

    def set(self, i, v):
        i += self.N
        self.arr[i] = v
        while i > 1:
            i //= 2
            self.arr[i] = self.arr[2*i] + self.arr[2*i+1]

    def get(self, a, b):
        a += self.N
        b += self.N
        ans = 0
        while a <= b:
            if a % 2 == 1:
                ans += self.arr[a]
                a += 1
            if b % 2 == 0:
                ans += self.arr[b]
                b -= 1
            a //= 2
            b //= 2
        return ans


def main():
    N, K = map(int, input().split())
    W = [int(input()) for i in range(N)]
    MAX = 1000000
    seg = Seg(MAX)

    for i in W:
        if i < 0:
            seg.set(-i, max(0, seg.get(-i, -i)-1))
        elif seg.get(i, MAX) < K:
            seg.set(i, seg.get(i, i)+1)

    print(seg.get(1, MAX))


if __name__ == '__main__':
    main()