#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define ld long double
#define pii pair<int, int>
#define f first
#define s second
#define boost() cin.tie(0), cin.sync_with_stdio(0)
const int MN = 500005;
int n, q, a[MN], l, r, st[MN * 4];
void build(int l, int r, int idx) {
if (l == r) {st[idx] = a[l]; return;}
int mid = (l + r) >> 1;
build(l, mid, idx * 2), build(mid + 1, r, idx * 2 + 1);
st[idx] = max(st[idx * 2], st[idx * 2 + 1]);
}
int qry(int l, int r, int x, int y, int idx) {
if (r < x || l > y || r < l) return -0x3f3f3f3f;
if (r <= y && l >= x) return st[idx];
int mid = (l + r) >> 1;
return max(qry(l, mid, x, y, idx * 2), qry(mid + 1, r, x, y, idx * 2 + 1));
}
int twos(int j, int i, int l, int r) {
if (j > i) swap(i, j);
int ret = 0;
int lo = max(l, j - (i - j));
ret = max(ret, qry(1, n, lo, j - 1, 1) + a[j] + a[i]);
int hi = i + (i - j);
ret = max(ret, qry(1, n, hi, r, 1) + a[j] + a[i]);
int mid = (j + i) / 2;
ret = max(ret, qry(1, n, j + 1, mid, 1) + a[j] + a[i]);
return ret;
}
int check(int i, int l, int r) {
int ret = 0;
for (int j = l; j <= r; j++) {
if (j != i) ret = max(ret, twos(i, j, l, r));
}
return ret;
}
int32_t main() {
boost();
cin >> n;
for (int i = 1; i <= n; i++) cin >> a[i];
build(1, n, 1);
cin >> q;
while (q--) {
cin >> l >> r;
vector<pii> v;
for (int i = l; i <= r; i++) v.push_back({a[i], i});
sort(v.begin(), v.end(), greater<>());
int ans = 0;
for (int i = 0; i < min((int) v.size(), 20ll); i++) {
ans = max(ans, check(v[i].s, l, r));
}
printf("%lld\n", ans);
}
return 0;
}
