#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using PII = std::pair<int, int>;
using PLL = std::pair<ll, ll>;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)

int main()
{

#ifdef DEBUG
    cout << "DEBUG MODE" << endl;
    ifstream in("input.txt"); //for debug
    cin.rdbuf(in.rdbuf());    //for debug
#endif

    int n, r, q, t, maxrain, s, left, right;
    cin >> n;

    maxrain = 0;
    s = 0;

    vector<int> rain;
    rep(i, n)
    {
        cin >> r;
        rain.push_back(r);
    }
    rep(i, 24)
    {
        s += rain[i];
    }

    maxrain = s;

    rep(i, n - 24)
    {
        s += rain[i + 24];
        s -= rain[i];
        maxrain = max(maxrain, s);
    }

    cin >> q;
    rep(i, q)
    {
        cin >> t >> r;
        rain[t - 1] = r;

        left = max(0, t - 25), right = min(n - 1, t + 25);

        s = 0;
        rep(i, 24)
        {
            s += rain[left + i];
        }
        maxrain = max(maxrain, s);

        rep(i, right - left - 23)
        {
            s += rain[left + i + 24];
            s -= rain[left + i];
            maxrain = max(maxrain, s);
        }

        cout << maxrain << endl;
    }

    return 0;
}