#-*- coding: utf-8 -*-
class Train():
    def __init__(self, K):
        self.cargo = []
        self.K = K

    def load(self, weight):
        if len(self.cargo) < self.K:
            self.cargo.append(weight)
            self.cargo.sort()
        elif self.cargo[-self.K] < weight:
            self.cargo.append(weight)
            self.cargo.sort()

        return None

    def unload(self, weight):
        if weight in self.cargo:
            i = self.cargo.index(weight)
            del self.cargo[i]

        return None

def station(ft, W):
    if W > 0:
        ft.load(W)
    else:
        ft.unload(-W)

def main(N, K):
    ft = Train(int(K))
    for i in range(int(N)):
        W = int(input())
        station(ft, W)

    return len(ft.cargo)

if __name__ == '__main__':
    print(main(*(input().split())))