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;
int main(){
	cin.tie(0); ios_base::sync_with_stdio(0);
	int N;
	cin >> N;
	vector<int> A(N);
	for(int i=0; i<N; i++){
		cin >> A[i];
	}
	int Q;
	cin >> Q;
	while(Q--){
		int L, R;
		cin >> L >> R;
		L--; R--;
		int ans=0;
		for(int a=L; a<R-1; a++){
			for(int c=a+2; c<=R; c++){
				for(int b=a+1; b<=a+(c-a)/2; b++){
					ans = max(ans, A[a]+A[b]+A[c]);
				}
			}
		}
		cout << ans << '\n';
	}
	return 0;
}
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