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  1. import java.util.*;
  2.  
  3. public class Main {
  4.     public static void main(String[] args) {
  5.         Scanner sc = new Scanner(System.in);
  6.  
  7.         int N = sc.nextInt();
  8.         int[] arr = new int[N];
  9.         for (int i = 0; i < N; i++) arr[i] = sc.nextInt();
  10.  
  11.  
  12.         int[] prefixsum = new int[N];
  13.         prefixsum[0] = arr[0];
  14.         for (int i = 1; i < N; i++) {
  15.             prefixsum[i] = prefixsum[i - 1] + arr[i];
  16.         }
  17.  
  18.         int q = sc.nextInt();
  19.         while (q-- > 0) {
  20.             int l = sc.nextInt();
  21.             int r = sc.nextInt();
  22.  
  23.             if (l == 0) {
  24.                 System.out.println(prefixsum[r]);
  25.             } else {
  26.                 System.out.println(prefixsum[r] - prefixsum[l - 1]);
  27.             }
  28.         }
  29.  
  30.  
  31.     }
  32. }
  33.  
Success #stdin #stdout 0.19s 54600KB
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https://ideone.com/RCVp0j
language:
Java (HotSpot 12)
created:
2 days ago
visibility:
public

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