package com.study.demo;

import java.util.Scanner;

public class test3_5 {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    int n = scanner.nextInt();
    int[] t = new int[n - 1];
    int[] s = new int[n];
    for (int i = 0; i < n - 1; i++) {
      t[i] = scanner.nextInt();
    }
    for (int i = 0; i < n; i++) {
      s[i] = scanner.nextInt();
    }
    int x = scanner.nextInt();
    int y = scanner.nextInt();

    int total = 0;
    if (x < y) {
      for (int i = x - 1; i < y - 1; i++) {
        total += s[i] + t[i];
      }
      total += s[y - 1];
    } else {
      for (int i = x - 1; i >= y; i--) {
        total += s[i] + (i > 0 ? t[i - 1] : 0);
      }
      total += s[y - 1];
    }
    System.out.println(total);
  }
}