题解 | #牛牛吃草#

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int n = in.nextInt();
        int[] w = new int[n];
        int[] a = new int[n];
        int[] f = new int[n];
        for (int i = 0; i < n; i++) {
            w[i] = in.nextInt();
            f[i] = w[i];
        }
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
        }

        int ans = 0;//最终的最大值

        for (int i=0; i<n; i++) {
            for (int j=0; j<i; j++) {
                if ((i-j)%a[j]==0) {
                    f[i] = Math.max(f[i], f[j] + w[i]);
                }
            }
        }
        for (int i=0; i<n; i++) {
            ans = Math.max(ans, f[i]);
        }
        System.out.print(ans);
    }
}