#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 1e6 + 5;
using pii = pair<ll, ll>;
int P = 998244353;
ll n, na[N], nb[N], tot, ans, q;
ll cnt;
struct node {
    ll data;
    ll sum, lazy;
} tree[N];
void pushup(int id, node* tree) {
    tree[id].data = tree[id << 1].data + tree[id << 1 | 1].data;
    tree[id].sum = tree[id << 1].sum + tree[id << 1 | 1].sum;
}
void change(int id, int l, int r, int x, int fg) {
    if (l == r) {
        if (fg) {
            tree[id].data++;
            tree[id].sum = tree[id].data * nb[l];
        } else {
            tree[id].data--;
            tree[id].sum = tree[id].data * nb[l];
        }
        return;
    }
    int mid = (l + r) >> 1;
    if (x <= mid) {
        change(id << 1, l, mid, x, fg);
    } else {
        change(id << 1 | 1, mid + 1, r, x, fg);
    }
    pushup(id, tree);
}
void query(int id, int l, int r, int ql, int qr) {
    if (ql <= l && r <= qr) {
        ans += tree[id].sum;
        cnt += tree[id].data;
        return;
    }
    int mid = (l + r) >> 1;
    if (ql <= mid) {
        query(id << 1, l, mid, ql, qr);
    }
    if (qr > mid) {
        query(id << 1 | 1, mid + 1, r, ql, qr);
    }
}
void solve() {
    cin >> n >> q;
    vector<pii> qy(q + 2);
    ll sum0 = 0;
    for (int i = 1; i <= n; i++) {
        cin >> na[i];
        if (na[i] > 0) {
            nb[++tot] = na[i];
        } else {
            sum0 += na[i];
        }
    }
    for (int i = 1; i <= q; i++) {
        int x, v;
        cin >> x >> v;
        qy[i] = {x, v};
        if (v > 0) {
            nb[++tot] = v;
        }
    }
    sort(nb + 1, nb + 1 + tot);
    tot = unique(nb + 1, nb + 1 + tot) - nb - 1;
    for (int i = 1; i <= n; i++) {
        if (na[i] > 0) {
            int k = lower_bound(nb + 1, nb + 1 + tot, na[i]) - nb;
            change(1, 1, tot, k, 1);
        }
    }
    for (int i = 1; i <= q; i++) {
        if (tot == 0) {
            cout << "1\n";
            continue;
        }
        auto [x, v] = qy[i];
        if (na[x] <= 0) {
            sum0 -= na[x];
            if (v <= 0) {
                sum0 += v;
            } else {
                int k = lower_bound(nb + 1, nb + 1 + tot, v) - nb;
                change(1, 1, tot, k, 1);
            }
        } else {
            int k = lower_bound(nb + 1, nb + 1 + tot, na[x]) - nb;
            change(1, 1, tot, k, 0);
            if (v <= 0) {
                sum0 += v;
            } else {
                int k = lower_bound(nb + 1, nb + 1 + tot, v) - nb;
                change(1, 1, tot, k, 1);
            }
        }
        na[x] = v;
        ll sum = abs(sum0);
        int l = 1, r = tot;
        while (l <= r) {
            int mid = (l + r) >> 1;
            ans = cnt = 0;
            query(1, 1, tot, 1, mid);
            if (ans <= sum) {
                l = mid + 1;
            } else {
                r = mid - 1;
            }
        }
        cnt = 0;
        l--;
        if (l == 0) {
            query(1, 1, tot, 1, 1);
            cnt = min(cnt, sum / nb[1]);
        } else {
            ans = 0;
            query(1, 1, tot, 1, l);

            if (l < n) {
                ll ct = cnt;
                cnt = 0;
                ll anss = ans;
                query(1, 1, tot, l + 1, l + 1);
                cnt = min(cnt, (sum - anss) / nb[l + 1]);
                cnt += ct;
            }
        }
        cout << cnt + 1 << '\n';
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    int _;
    _ = 1;
    // cin >> _;
    while (_--) {
        solve();
    }
}