#include <bits/stdc++.h>
using namespace std;
template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl
using ll = long long;
const ll mod = 1e9+7;
const int maxn = 1e6 + 5;
int n, q;
int A[maxn];
vector<pair<int,int>> Q;
int main() {
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin>>n;
for (int i=1; i<=n; i++) {
cin>>A[i];
}
cin>>q;
Q.resize(q);
for (int i=0; i<q; i++) {
cin>>Q[i].first>>Q[i].second;
}
for (auto qu: Q) {
int l = qu.first;
int r = qu.second;
int res = 0;
for (int a=l; a<=r; a++) {
for (int b=a+1; b<=r; b++) {
for (int c=b+1; c<=r; c++) {
if (b-a <= c-b) {
res = max(res, A[a]+A[b]+A[c]);
}
}
}
}
cout<<res<<"\n";
}
return 0;
}
