#include <bits/stdc++.h>
using namespace std;

#define int long long

signed main(){
    int n;
    cin >> n;
    int a[200010];
    for(int i = 0;i < n;i++){
        cin >> a[i];
    }

    int b[200010] = {};

    int ma = 0;
    for(int i = 0;i <= n-24;i++){
        for(int j = 0;j < 24;j++){
            b[i] += a[i+j];
        }
        ma = max(ma, b[i]);
    }

    int q;
    cin >> q;

    for(int p = 0;p < q;p++){
        int t, v;
        cin >> t >> v;
        t--;
        int d = v-a[t];

        a[t] = v;

        for(int i = max(0ll, t-23);i <= t;i++){
            if(i+24 <= n){
                b[i] += d;
                ma = max(ma, b[i]);
            }
        }
        cout << ma << endl;
    }

    return 0;
}