#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int mod = 1e9 + 7;
const int inf = (1 << 30) - 1;
const ll infll = (1LL << 61) - 1;

int N, Q;
ll mx;

int main()
{
    cin >> N;
    vector<ll> a(N), rain(N - 23);
    for (int i = 0; i < N; i++)
        cin >> a[i];

    for (int i = 0; i + 23 < N; i++)
    {
        for (int j = 0; j < 24; j++)
        {
            rain[i] += a[i + j];
        }
        mx = max(mx, rain[i]);
    }

    cin >> Q;

    for (int i = 0; i < Q; i++)
    {
        int t;
        ll v;
        cin >> t >> v;
        t--;

        for (int j = max(0, t - 23); j <= min(t, N - 24); j++)
        {
            rain[j] += v - a[t];
            mx = max(mx, rain[j]);
        }
        
        a[t] = v;

        cout << mx << endl;
    }
}