#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = long long;
using std::cout;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

int main() {
	int n; scanf("%d", &n); std::vector<int> a(n);
	for(int i = 0; i < n; i++) scanf("%d", &a[i]);

	const int day = 24;

	int ma = -1;
	for(int i = 0; i < n - day + 1; i++) {
		int sum = 0;
		for(int j = 0; j < day; j++) sum += a[i + j];

		ma = std::max(ma, sum);
	}
	
	int q; scanf("%d", &q);
	while(q--) {
		int p, x; scanf("%d%d", &p, &x); p--;

		a[p] = x;
		for(int i = std::max(0, p - day + 1); i <= std::min(p, n - day); i++) {
			int sum = 0;
			for(int j = 0; j < day; j++) sum += a[i + j];

			ma = std::max(ma, sum);
		}

		printf("%d\n", ma);
	}
	return 0;
}