#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
cin >> n;
int a[n + 1];
for(int i = 1; i <= n; i++)
cin >> a[i];
int q;
cin >> q;
while(q--){
int l, r;
cin >> l >> r;
int mx = 0;
// cout << l << ' ' << r << endl;
for(int i = l; i <= r; i++){
for(int j = i + 1; j <= r; j++){
for(int k = j + 1; k <= r; k++){
if(k - j >= j - i){
// cout << i << '-' << j << '-' << k << ';' << a[i] << ' ' << a[j] << ' ' << a[k] << endl;
mx = max(mx, a[i] + a[j] + a[k]);
}
}
}
}
cout << mx << endl;
}
}
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