This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, q;
int arr[500005];
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n;
    for(int i = 0; i < n; i++) cin >> arr[i];
    cin >> q;
    for(int i = 0; i < q; i++){
        int maxm = 0;
        int l, r;
        cin >> l >> r;
        for(int x = l-1; x < (r-2); x++){
            for(int j = x+1; j < ((l+r)/2); j++){
                for(int y = (j-x)+j; y < r; y++){
                    //cout << arr[x]+arr[j]+arr[y] << "\n";
                    maxm = max(maxm, arr[x]+arr[j]+arr[y]);
                }
            }
        }
        cout << maxm << "\n";
    }
    return 0;
}
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