#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
const ll N=105;
ll a[N],n,q;
int main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
cin>>n;
for (ll i=1;i<=n;i++) cin>>a[i];
cin>>q;
while (q--){
ll l,r;cin>>l>>r;
ll mx=0;
for (ll i=l;i<=r;i++){
for (ll j=i+1;j<=r;j++){
for (ll k=j+j-i;k<=r;k++){
mx=max(mx,a[i]+a[j]+a[k]);
}
}
}
cout<<mx<<endl;
}
return 0;
}
