using System;

namespace Intervals
{
    class Program
    {
        private static void Summ(long[] summ, string interval)
        {
            Console.WriteLine(summ[int.Parse(interval.Split()[1])]-summ[int.Parse(interval.Split()[0])-1]);
        }

        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            var elems = new int[n+1];
            elems[0] = 0;
            for (int i = 1; i <= n; i++)
                elems[i] = int.Parse(Console.ReadLine());
            var summ = new long[n+1];
            summ[0] = 0;
                for (int i = 1; i <= n; i++)
                    summ[i] = summ[i - 1] + elems[i];
            int q = int.Parse(Console.ReadLine());
            var intervals = new string[q];
            for (int i = 0; i < q; i++)
                intervals[i] = Console.ReadLine();
            foreach (var e in intervals)
                Summ(summ, e);
        }
    }
}