#include <bits/stdc++.h>

int ri() {
	int n;
	scanf("%d", &n);
	return n;
}
int64_t rll() {
	long long n;
	scanf("%lld", &n);
	return n;
}

int main() {
	int n = ri();
	int a[n];
	for (int i = 0; i < n; i++) a[i] = ri();
	
	int q = ri();
	int res = 0;
	for (int i = 0; i <= n - 24; i++) {
		int sum = 0;
		for (int j = 0; j < 24; j++) sum += a[i + j];
		res = std::max(res, sum);
	}
	for (int i = 0; i < q; i++) {
		int t = ri() - 1;
		int v = ri();
		a[t] = v;
		for (int i = std::max(0, t - 23); i <= std::min(t, n - 24); i++) {
			int sum = 0;
			for (int j = 0; j < 24; j++) sum += a[i + j];
			res = std::max(res, sum);
		}
		std::cout << res << std::endl;
	}
	
	return 0;
}