import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] arr = new int[n + 1];
        int[] sums = new int[n + 1];
        int[] total24 = new int[n + 1 - 23];
        for (int i = 1; i <= n; i++) {
            arr[i] = sc.nextInt();
            sums[i] = sums[i - 1] + arr[i];
        }
        int max = 0;
        for (int i = 24; i <= n; i++) {
            total24[i - 23] = sums[i] - sums[i - 24];
            max = Math.max(total24[i - 23], max);
        }
        int q = sc.nextInt();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < q; i++) {
            int time = sc.nextInt();
            int value = sc.nextInt();
            int add = value - arr[time];
            arr[time] = value;
            for (int j = Math.max(time - 23, 1); j <= time && j < total24.length; j++) {
                total24[j] += add;
                max = Math.max(max, total24[j]);
            }
            sb.append(max).append("\n");
        }
        System.out.print(sb);
    }
}