#include <bits/stdc++.h>
using namespace std;
using lint = long long;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V< V<T> >;

int main() {
  cin.tie(nullptr); ios::sync_with_stdio(false);
  int n; cin >> n;
  V<> a(n); for (auto&& e : a) cin >> e;
  int q; cin >> q;
  int res = 0;
  for (int i = 0; i + 24 <= n; ++i) {
    res = max(res, accumulate(begin(a) + i, begin(a) + i + 24, 0));
  }
  while (q--) {
    int t, x; cin >> t >> x, --t;
    a[t] = x;
    for (int i = max(t - 23, 0); i <= min(t, n - 24); ++i) {
      res = max(res, accumulate(begin(a) + i, begin(a) + i + 24, 0));
    }
    cout << res << '\n';
  }
}