Envío 1220

Código

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sn = new Scanner(System.in);
        int size = Integer.parseInt(sn.nextLine());
        String[] arItems = sn.nextLine().split(" ");
        int subArrSize = Integer.parseInt(sn.nextLine());
        Integer[] entries = new Integer[size];
        for (int i = 0; i < size; i++) {
            int arItem = Integer.parseInt(arItems[i]);
            entries[i] = arItem;
        }
        Integer[] sum = new Integer[size];
        int suma = 0;
        for (int j = 0; j < size; j++) {
            suma += entries[j];
            sum[j] = suma;
        }
        for (int i = 0; i < subArrSize; i++) {
            String[] subItems = sn.nextLine().split(" ");
            int p = Integer.parseInt(subItems[0]);
            int q = Integer.parseInt(subItems[1]);
            int res = sum[q] - sum[p] + entries[p];
            System.out.println(res);
        }
    }
}