#include "bits/stdc++.h"

using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define endl "\n"

const int N = 4e5 + 10;
const ll INF = 0x3f3f3f3f3f3f3f;

ll n, m;
ll q;
vector<ll> a(N), tmp(N);
map<ll, ll> mp;
struct node
{
  int l, r;
  ll cnt;
  ll sum;
} t[N << 2];
#define lu u << 1
#define ru u << 1 | 1

void build(int u, int l, int r)
{
  t[u] = {l, r, 0, 0};
  if (l == r)
    return;
  int mid = (l + r) >> 1;
  build(lu, l, mid);
  build(ru, mid + 1, r);
}

void upd(int u, int pos, ll val)
{
  if (t[u].l == t[u].r)
  {
    t[u].cnt++;
    t[u].sum += val;
    return;
  }
  int mid = (t[u].l + t[u].r) >> 1;
  if (pos <= mid)
    upd(lu, pos, val);
  else
    upd(ru, pos, val);
  t[u].cnt = t[lu].cnt + t[ru].cnt;
  t[u].sum = t[lu].sum + t[ru].sum;
}

void del(int u, int pos, ll val)
{
  if (t[u].l == t[u].r)
  {
    t[u].cnt--;
    t[u].sum -= val;
    return;
  }
  int mid = (t[u].l + t[u].r) >> 1;
  if (pos <= mid)
    del(lu, pos, val);
  else
    del(ru, pos, val);
  t[u].cnt = t[lu].cnt + t[ru].cnt;
  t[u].sum = t[lu].sum + t[ru].sum;
}

int bs(int u, ll tar)
{
  if (t[u].sum <= tar)
    return t[u].r;
  if (t[u].l == t[u].r)
  {
    if (t[u].sum <= tar)
      return t[u].r;
    return t[u].l - 1;
  }
  if (t[lu].sum >= tar)
    return bs(lu, tar);
  return bs(ru, tar - t[lu].sum);
}

ll ask(int u, int l, int r)
{
  if (t[u].l >= l && t[u].r <= r)
    return t[u].cnt;
  int mid = (t[u].l + t[u].r) >> 1;
  ll res = 0;
  if (r > mid)
    res += ask(ru, l, r);
  if (l <= mid)
    res += ask(lu, l, r);
  return res;
}
void solve()
{
  cin >> n >> q;
  set<ll> st;
  ll fu = 0;
  for (int i = 1; i <= n; i++)
  {
    cin >> a[i];
    if (a[i] < 0)
      fu++;
    if(a[i]==0)continue;
    st.insert(a[i]);
  }
  vector<pll> qry(q + 5);
  for (int i = 1; i <= q; i++)
  {
    cin >> qry[i].first >> qry[i].second;
    st.insert(qry[i].second);
  }
  int tt = 1;
  for (auto e : st)
  {
    tmp[tt] = e;
    mp[e] = tt++;
  }
  build(1, 1, tt);
  for (int i = 1; i <= n; i++)
  {
    if(a[i])
      upd(1, mp[a[i]], a[i]);
  }
  for (int i = 1; i <= q; i++)
  {
    if(a[qry[i].first])del(1, mp[a[qry[i].first]], a[qry[i].first]);
    if(qry[i].second)upd(1, mp[qry[i].second], qry[i].second);
    if (a[qry[i].first] < 0)
      fu--;
    if (qry[i].second < 0)
      fu++;
    a[qry[i].first] = qry[i].second;
    int pos = bs(1, 0);
    ll ans = ask(1, 1, pos);
    // cout << "pos: " << pos << endl;
    // cout << "cnt: "<<ans<<endl;
    cout << ans - fu + 1 << endl;
  }
}

int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  int _ = 1;
  // cin>>_;
  while (_--)
    solve();
  return 0;
}