#include <cstdio>
int main(void)
{
    int n, q, a[2001] = {}, sum[2002] = {};
    scanf("%d", &n);
    for(int i = 0; i < n; i++) {
        scanf("%d", a + i);
        sum[i + 1] = sum[i] + a[i];
    }
    int max = 0;
    for(int j = 24; j <= n; j++) {
        if(max < sum[j] - sum[j - 24]) {
            max = sum[j] - sum[j - 24];
        }
    }
    scanf("%d", &q);
    for(int i = 0; i < q; i++) {
        int t, v;
        scanf("%d%d", &t, &v);
        int tmp = v - a[t - 1];
        for(int j = t; j <= n; j++) {
            sum[j] += tmp;
        }
        a[t - 1] = v;
        int max_tmp = 0;
        for(int j = 24; j <= n; j++) {
            if(max_tmp < sum[j] - sum[j - 24]) {
                max_tmp = sum[j] - sum[j - 24];
            }
        }
        if(max_tmp > max) {
            max = max_tmp;
        }
        printf("%d\n", max);
    }
    return 0;
}