#include <bits/stdc++.h>
using namespace std;
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 10000000000000000



int main(){
	long long N;
	cin>>N;
	
	vector<int> A(N);
	for(int i=0;i<N;i++){
		cin>>A[i];
	}
	
	vector<int> sum(N-24+1,0);
	
	int ans = 0;
	
	for(int i=0;i<N-24+1;i++){
		if(i==0){
			for(int j=0;j<24;j++)sum[i]+=A[j];
		}
		else{
			sum[i] = sum[i-1];
			sum[i] -= A[i-1];
			sum[i] += A[i+24-1];
		}
		ans = max(ans,sum[i]);
	}
	
	int Q;
	cin>>Q;
	
	for(int i=0;i<Q;i++){
		int a,b;
		cin>>a>>b;
		a--;
		int k = b-A[a];
		A[a] = b;
		for(int j=max(0,a-23);j<=min(a,(int)sum.size()-1);j++){
			sum[j] += k;
			ans = max(ans,sum[j]);
		}
		cout<<ans<<endl;
	}
	
	
	
	
	
	return 0;
}