Envío 981

Código

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class Main{

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;
		int n, p, q, sum[], c;
		st = new StringTokenizer(br.readLine());
		n = Integer.parseInt(st.nextToken());
		sum = new int[n];
		st = new StringTokenizer(br.readLine());
		sum[0] = Integer.parseInt(st.nextToken());
		for (int i = 1; i < sum.length; i++) {
			sum[i] = sum[i - 1] + Integer.parseInt(st.nextToken());
		}
		st = new StringTokenizer(br.readLine());
		c = Integer.parseInt(st.nextToken());
		for (int i = 0; i < c; i++) {
			st = new StringTokenizer(br.readLine());
			p = Integer.parseInt(st.nextToken());
			q = Integer.parseInt(st.nextToken());
			if (p == 0) {
				System.out.println(sum[q]);
			} else {
				System.out.println(sum[q] - sum[p - 1]);
			}
		}
	}

}