import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(sa[i]);
		}
		int q = Integer.parseInt(br.readLine());
		int[] t = new int[q];
		int[] v = new int[q];
		for (int i = 0; i < q; i++) {
			sa = br.readLine().split(" ");
			t[i] = Integer.parseInt(sa[0]) - 1;
			v[i] = Integer.parseInt(sa[1]);
		}
		br.close();

		int[] b = new int[n];
		int sum = 0;
		for (int i = 0; i < 24; i++) {
			sum += a[i];
		}
		b[23] = sum;
		for (int i = 24; i < n; i++) {
			sum -= a[i - 24];
			sum += a[i];
			b[i] = sum;
		}

		int max = 0;
		for (int i = 23; i < n; i++) {
			max = Math.max(max, b[i]);
		}

		PrintWriter pw = new PrintWriter(System.out);
		for (int i = 0; i < q; i++) {
			int d = v[i] - a[t[i]];
			a[t[i]] = v[i];
			for (int j = Math.max(t[i] - 23, 0); j < Math.min(t[i] + 24, n); j++) {
				b[j] += d;
				max = Math.max(max, b[j]);
			}
			pw.println(max);
		}
		pw.flush();
	}
}