#include <algorithm>
#include <cstdio>
#include <iostream>
using namespace std;
const int N = 2e5 + 5;
typedef long long ll;
typedef pair <int, int> PII;
int n, q, a[N];ll neg;
int len, b[N << 1];
PII qs[N];

struct SegTree
{
    #define lc(u) u << 1
    #define rc(u) u << 1 | 1
    struct node
    {
        int l, r;
        int val;ll sum;
    }tr[N << 3];
    void pushup(int u){tr[u].val = tr[lc(u)].val + tr[rc(u)].val, tr[u].sum = tr[lc(u)].sum + tr[rc(u)].sum;}
    void build(int u, int l, int r)
    {
        tr[u].l = l, tr[u].r = r;
        if(l == r)return;
        int m = (l + r) >> 1;
        build(lc(u), l, m), build(rc(u), m + 1, r);
    }
    void modify(int u, int l, int r, int pos, int val)
    {
        if(tr[u].l == tr[u].r)return (void)(tr[u].val += val, tr[u].sum += b[pos] * val);
        int m = (tr[u].l + tr[u].r) >> 1;
        if(pos <= m)modify(lc(u), l, r, pos, val);
        else modify(rc(u), l, r, pos, val);
        pushup(u);
    }
    int query(int u, ll val)
    {
        if(tr[u].l == tr[u].r)return val >= tr[u].sum ? tr[u].val : 0;
        if(tr[lc(u)].sum < val)return tr[lc(u)].val + query(rc(u), val - tr[lc(u)].sum);
        else return query(lc(u), val);
    }
    #undef lc
    #undef rc
}tr;

int main()
{
    scanf("%d%d", &n, &q);
    for(int i = 1;i <= n;i++)
    {
        scanf("%d", &a[i]);
        if(a[i] >= 0)b[++len] = a[i];
        else neg += a[i];
    }
    for(int i = 1;i <= q;i++)
    {
        scanf("%d%d", &qs[i].first, &qs[i].second);
        if(qs[i].second >= 0)
            b[++len] = qs[i].second;
    }

    sort(b + 1, b + len + 1);
    for(int i = 1;i <= n;i++)
    {
        if(a[i] < 0)continue;
        int pos = lower_bound(b + 1, b + len + 1, a[i]) - b;
        a[i] = pos, b[pos]--;
    }
    for(int i = 1;i <= q;i++)
    {
        if(qs[i].second < 0)continue;
        int pos = lower_bound(b + 1, b + len + 1, qs[i].second) - b;
        qs[i].second = pos, b[pos]--;
    }
    for(int i = 1;i <= len;i++)b[i]++;

    if(len)
    {
        tr.build(1, 1, len);
        for(int i = 1;i <= n;i++)
            if(a[i] > 0)
                tr.modify(1, 1, len, a[i], 1);
    }
    for(int i = 1;i <= q;i++)
    {
        if(a[qs[i].first] < 0)neg -= a[qs[i].first];
        else tr.modify(1, 1, len, a[qs[i].first], -1);
        if(qs[i].second < 0)neg += qs[i].second;
        else tr.modify(1, 1, len, qs[i].second, 1);
        printf("%d\n", tr.query(1, -neg) + 1);
        a[qs[i].first] = qs[i].second;
    }
    return 0;
}