#include <bits/stdc++.h>
using namespace std;
template <class T>
inline bool chmax(T &a, T b)
{
    if (a < b)
    {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
inline bool chmin(T &a, T b)
{
    if (a > b)
    {
        a = b;
        return 1;
    }
    return 0;
}
typedef long long int ll;

#define EPS (1e-7)
#define INF (1 << 30)
#define LLINF (1LL << 60)
#define PI (acos(-1))
#define MOD (1000000007)
#define ALL(v) (v).begin(), (v).end()
#define RALL(v) (v).rbegin(), (v).rend()
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};

//-------------------------------------

struct BIT // 0-indexed
{
    ll n;
    vector<ll> bit;
    // 初期化
    void init(ll n_input)
    {
        n = n_input + 1;
        bit.resize(n + 1, 0);
    }
    // v[0] + ... + v[k-1]
    ll sum(ll k)
    {
        ll res = 0;
        for (ll i = k - 1; i >= 0; i = (i & (i + 1)) - 1)
        {
            res += bit[i];
        }
        return res;
    }
    // v[i] + ... + v[j]
    ll sum_between(ll i, ll j)
    {
        return i <= j ? sum(j + 1) - sum(i) : 0;
    }
    // v[k] += x
    void add(ll k, ll x)
    {
        for (ll i = k; i < n; i |= i + 1)
        {
            bit[i] += x;
        }
    }
};

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n, k;
    cin >> n >> k;
    const ll mxw = 1000000;
    BIT btree;
    btree.init(mxw);
    for (ll i = 0; i < n; i++)
    {
        ll w;
        cin >> w;
        if (w > 0)
        {
            if (btree.sum_between(w, mxw) < k)
            {
                btree.add(w, 1);
            }
        }
        else
        {
            w = -w;
            if (btree.sum_between(1, w) - btree.sum_between(1, w - 1) > 0)
            {
                btree.add(w, -1);
            }
        }
    }
    ll ans = btree.sum_between(1, mxw);
    cout << ans << endl;
}