#include <cstdio>
int main(void)
{
    int n, q, a[200001] = {}, sum_all[200002] = {}, sum_24[200002] = {};
    scanf("%d", &n);
    for(int i = 0; i < n; i++) {
        scanf("%d", a + i);
        sum_all[i + 1] = sum_all[i] + a[i];
    }
    for(int i = 24; i <= n; i++) {
        sum_24[i] = sum_all[i] - sum_all[i - 24];
    }
    int max = 0;
    for(int j = 24; j <= n; j++) {
        if(max < sum_24[j]) {
            max = sum_24[j];
        }
    }
    int max_tmp = 0;
    scanf("%d", &q);
    for(int i = 0; i < q; i++) {
        max_tmp = 0;
        int t, v;
        scanf("%d%d", &t, &v);
        int tmp = v - a[t - 1];
        for(int j = t; j < t + 24; j++) {
            if((sum_24[j] += tmp) > max_tmp) {
                max_tmp = sum_24[j];
            }
        }
        if(max_tmp > max) {
            max = max_tmp;
        }
        printf("%d\n", max);
    }
    return 0;
}