#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

#define Buff ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr)
//#define int long long

constexpr int MX = 1e9 + 10;

class DST
{
public:
    DST()
    {
        idx = 1;
        Mxn = MX;
        lc.assign(7e6, 0);
        rc.assign(7e6, 0);
        sg.assign(7e6, 0);
        stm.assign(7e6, 0);
    }

    void update(int p, ll x)
    {
        int rt = 1;
        _update(p, p, x, 0, Mxn, rt);
    }

    void update(int l, int r, ll x)
    {
        int rt = 1;
        _update(l, r, x, 0, Mxn, rt);
    }

    ll query(int p)
    {
        return _query(p, 0, Mxn, 1);
    }

private:
    int idx, Mxn;
    vector<ll> stm, sg;
    vector<int> lc, rc;

    void _update(ll L, ll R, ll x, ll l, ll r, int &pt)
    {
        if (!pt)
            pt = ++idx;
        int p = pt;
        stm[p] += x * (R - L + 1);
        if (L <= l && r <= R)
        {
            sg[p] += x;
            return;
        }
        ll mid = (l + r) >> 1;
        if (R <= mid)
            _update(L, R, x, l, mid, lc[p]);
        else if (L > mid)
            _update(L, R, x, mid + 1, r, rc[p]);
        else
        {
            _update(L, mid, x, l, mid, lc[p]);
            _update(mid + 1, R, x, mid + 1, r, rc[p]);
        }
    }

    ll _query(ll px, ll l, ll r, int p)
    {
        if (!p) return 0;
        if (l == px && r == px)
            return stm[p];
        ll mid = (l + r) >> 1;
        ll ret = sg[p];
        if (px <= mid)
            ret += _query(px, l, mid, lc[p]);
        else if (px > mid)
            ret += _query(px, mid + 1, r, rc[p]);
        return ret;
    }
};

map<int, int> Ct;

ll a[200010];
void solve()
{
    int n, q;
    cin >> n >> q;

    DST T1, T2;

    ll Sf = 0, Sz = 0, Cz = 0;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
        if (a[i] < 0)
            Sf += a[i];
        else if (a[i] > 0)
        {
            Cz++;
            Sz += a[i];
            Ct[a[i]]++;
            T1.update(a[i], MX, a[i]);
            T2.update(a[i], MX, 1);
        }
    }

    while (q--)
    {
        int p;
        ll x;
        cin >> p >> x;

        if (a[p] < 0)
        {
            Sf -= a[p];
            a[p] = x;
        }
        else
        {
            Cz--;
            Sz -= a[p];
            Ct[a[p]]--;
            T1.update(a[p], MX, -a[p]);
            T2.update(a[p], MX, -1);
            a[p] = x;
        }

        if (x <= 0)
            Sf += x;
        else
        {
            Cz++;
            Sz += x;
            Ct[x]++;
            T1.update(x, MX, x);
            T2.update(x, MX, 1);
        }

        if (Sf == 0)
        {
            cout << "1\n";
            continue;
        }


        auto check = [&](int px) -> bool
        {
            ll qy = T1.query(px);
            if (Sf + qy >= 0)
                return true;
            else
                return false;
        };

        int l = 0, r = MX;
        while (l < r)
        {
            int mid = (l + r) >> 1;
            if (check(mid))
                r = mid;
            else
                l = mid + 1;
        }
        int mxc = T2.query(l);
        ll ca = T1.query(l) + Sf;
        int cty = Ct[l];
        while (cty-- && ca > 0)
        {
            ca -= l;
            mxc--;
        }
        int ans = mxc + 1;
        cout << ans << '\n';
    }
}

signed main()
{
#ifdef YGYYYGJ
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif
    Buff;
    int _T_ = 1;
    while (_T_--)
    {
        solve();
    }
    return 0;
}