#include <bits/stdc++.h>

using namespace std;
using ll = long long int;

int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);

  int n;
  cin >> n;
  vector<int> a(n);
  for (auto &x : a)
    cin >> x;
  vector<int> b(n);
  int sum = 0;
  int ans = 0;
  for (int i = 0; i < n; i++) {
    if (i < 24)
      sum += a[i];
    else
      sum += a[i] - a[i - 24];
    b[i] = sum;
    ans = max(ans, b[i]);
  }

  int q;
  cin >> q;
  while (--q >= 0) {
    int t, v;
    cin >> t >> v;
    t--;
    int d = v - a[t];
    a[t] = v;
    for (int i = t; i < min(n, t + 24); i++) {
      b[i] += d;
      ans = max(ans, b[i]);
    }
    cout << ans << endl;
  }

  return 0;
}