Bandits appeared in the city! One of them is trying to catch as many citizens as he can.

The city consists of n squares connected by n-1 roads in such a way that it is possible to reach any square from any other square. The square number 1 is the main square.

After Sunday walk all the roads were changed to one-way roads in such a way that it is possible to reach any square from the main square.

At the moment when the bandit appeared on the main square there were a_i citizens on the i-th square. Now the following process will begin. First, each citizen that is currently on a square with some outgoing one-way roads chooses one of such roads and moves along it to another square. Then the bandit chooses one of the one-way roads outgoing from the square he is located and moves along it. The process is repeated until the bandit is located on a square with no outgoing roads. The bandit catches all the citizens on that square.

The bandit wants to catch as many citizens as possible; the citizens want to minimize the number of caught people. The bandit and the citizens know positions of all citizens at any time, the citizens can cooperate. If both sides act optimally, how many citizens will be caught?

Input

The first line contains a single integer n — the number of squares in the city (2 ≤ n ≤ 2⋅10^5).

The second line contains n-1 integers p_2, p_3 ... p_n meaning that there is a one-way road from the square p_i to the square i (1 ≤ p_i < i). 

The third line contains n integers a_1, a_2, ..., a_n — the number of citizens on each square initially (0 ≤ a_i ≤ 10^9).

Output

Print a single integer — the number of citizens the bandit will catch if both sides act optimally.

Examples

Input


3
1 1
3 1 2


Output


3


Input


3
1 1
3 1 3


Output


4

Note

In the first example the citizens on the square 1 can split into two groups 2 + 1, so that the second and on the third squares will have 3 citizens each.

In the second example no matter how citizens act the bandit can catch at least 4 citizens.
import java.io.*;
import java.util.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;

// 11:35.587

public class cf1436d {

    public static void main(String[] args) throws IOException {
        int n = ri(), p[] = riam1(n - 1), a[] = ria(n), leaves[] = new int[n];
        long sum[] = new long[n], ans[] = new long[n];
        Graph g = graph(n);
        for (int i = 1; i < n; ++i) {
            g.cto(p[i - 1], i);
        }
        dfs(g, 0, a, leaves, sum, ans);
        prln(ans[0]);
        close();
    }

    static void dfs(Graph g, int i, int[] a, int[] leaves, long[] sum, long[] ans) {
        int cnt = 0;
        for (int j : g.get(i)) {
            ++cnt;
            dfs(g, j, a, leaves, sum, ans);
            ans[i] = max(ans[i], ans[j]);
            sum[i] += sum[j];
            leaves[i] += leaves[j];
        }
        if (cnt == 0) {
            ++leaves[i];
            ans[i] = a[i];
        }
        sum[i] += a[i];
        ans[i] = max(ans[i], (sum[i] + leaves[i] - 1) / leaves[i]);
    }

    static Graph graph(int n) {
        Graph g = new Graph();
        for (int i = 0; i < n; ++i) {
            g.add(new ArrayList<>());
        }
        return g;
    }

    static Graph graph(int n, int m) throws IOException {
        Graph g = graph(n);
        for (int i = 0; i < m; ++i) {
            g.c(rni() - 1, ni() - 1);
        }
        return g;
    }

    static Graph tree(int n) throws IOException {
        return graph(n, n - 1);
    }

    static class Graph extends ArrayList<List<Integer>> {
        void cto(int u, int v) {
            get(u).add(v);
        }

        void c(int u, int v) {
            cto(u, v);
            cto(v, u);
        }

        boolean is_leaf(int i) {
            return get(i).size() == 1;
        }
    }

    static BufferedReader __i = new BufferedReader(new InputStreamReader(System.in));
    static PrintWriter __o = new PrintWriter(new OutputStreamWriter(System.out));
    static StringTokenizer input;
    static Random __r = new Random();

    // references
    // IBIG = 1e9 + 7
    // IMAX ~= 2e9
    // LMAX ~= 9e18

    // constants
    static final int IBIG = 1000000007;
    static final int IMAX = 2147483647;
    static final int IMIN = -2147483648;
    static final long LMAX = 9223372036854775807L;
    static final long LMIN = -9223372036854775808L;

    // math util
    static int minof(int a, int b, int c) {
        return min(a, min(b, c));
    }

    static int minof(int... x) {
        if (x.length == 1) return x[0];
        if (x.length == 2) return min(x[0], x[1]);
        if (x.length == 3) return min(x[0], min(x[1], x[2]));
        int min = x[0];
        for (int i = 1; i < x.length; ++i) if (x[i] < min) min = x[i];
        return min;
    }

    static long minof(long a, long b, long c) {
        return min(a, min(b, c));
    }

    static long minof(long... x) {
        if (x.length == 1) return x[0];
        if (x.length == 2) return min(x[0], x[1]);
        if (x.length == 3) return min(x[0], min(x[1], x[2]));
        long min = x[0];
        for (int i = 1; i < x.length; ++i) if (x[i] < min) min = x[i];
        return min;
    }

    static int maxof(int a, int b, int c) {
        return max(a, max(b, c));
    }

    static int maxof(int... x) {
        if (x.length == 1) return x[0];
        if (x.length == 2) return max(x[0], x[1]);
        if (x.length == 3) return max(x[0], max(x[1], x[2]));
        int max = x[0];
        for (int i = 1; i < x.length; ++i) if (x[i] > max) max = x[i];
        return max;
    }

    static long maxof(long a, long b, long c) {
        return max(a, max(b, c));
    }

    static long maxof(long... x) {
        if (x.length == 1) return x[0];
        if (x.length == 2) return max(x[0], x[1]);
        if (x.length == 3) return max(x[0], max(x[1], x[2]));
        long max = x[0];
        for (int i = 1; i < x.length; ++i) if (x[i] > max) max = x[i];
        return max;
    }

    static int powi(int a, int b) {
        if (a == 0) return 0;
        int ans = 1;
        while (b > 0) {
            if ((b & 1) > 0) ans *= a;
            a *= a;
            b >>= 1;
        }
        return ans;
    }

    static long powl(long a, int b) {
        if (a == 0) return 0;
        long ans = 1;
        while (b > 0) {
            if ((b & 1) > 0) ans *= a;
            a *= a;
            b >>= 1;
        }
        return ans;
    }

    static int fli(double d) {
        return (int) d;
    }

    static int cei(double d) {
        return (int) ceil(d);
    }

    static long fll(double d) {
        return (long) d;
    }

    static long cel(double d) {
        return (long) ceil(d);
    }

    static int gcf(int a, int b) {
        return b == 0 ? a : gcf(b, a % b);
    }

    static long gcf(long a, long b) {
        return b == 0 ? a : gcf(b, a % b);
    }

    static int[] exgcd(int a, int b) {
        if (b == 0) return new int[]{1, 0};
        int[] y = exgcd(b, a % b);
        return new int[]{y[1], y[0] - y[1] * (a / b)};
    }

    static long[] exgcd(long a, long b) {
        if (b == 0) return new long[]{1, 0};
        long[] y = exgcd(b, a % b);
        return new long[]{y[1], y[0] - y[1] * (a / b)};
    }

    static int randInt(int min, int max) {
        return __r.nextInt(max - min + 1) + min;
    }

    static long mix(long x) {
        x += 0x9e3779b97f4a7c15L;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9L;
        x = (x ^ (x >> 27)) * 0x94d049bb133111ebL;
        return x ^ (x >> 31);
    }

    // array util
    static void reverse(int[] a) {
        for (int i = 0, n = a.length, half = n / 2; i < half; ++i) {
            int swap = a[i];
            a[i] = a[n - i - 1];
            a[n - i - 1] = swap;
        }
    }

    static void reverse(long[] a) {
        for (int i = 0, n = a.length, half = n / 2; i < half; ++i) {
            long swap = a[i];
            a[i] = a[n - i - 1];
            a[n - i - 1] = swap;
        }
    }

    static void reverse(double[] a) {
        for (int i = 0, n = a.length, half = n / 2; i < half; ++i) {
            double swap = a[i];
            a[i] = a[n - i - 1];
            a[n - i - 1] = swap;
        }
    }

    static void reverse(char[] a) {
        for (int i = 0, n = a.length, half = n / 2; i < half; ++i) {
            char swap = a[i];
            a[i] = a[n - i - 1];
            a[n - i - 1] = swap;
        }
    }

    static void shuffle(int[] a) {
        int n = a.length - 1;
        for (int i = 0; i < n; ++i) {
            int ind = randInt(i, n);
            int swap = a[i];
            a[i] = a[ind];
            a[ind] = swap;
        }
    }

    static void shuffle(long[] a) {
        int n = a.length - 1;
        for (int i = 0; i < n; ++i) {
            int ind = randInt(i, n);
            long swap = a[i];
            a[i] = a[ind];
            a[ind] = swap;
        }
    }

    static void shuffle(double[] a) {
        int n = a.length - 1;
        for (int i = 0; i < n; ++i) {
            int ind = randInt(i, n);
            double swap = a[i];
            a[i] = a[ind];
            a[ind] = swap;
        }
    }

    static void rsort(int[] a) {
        shuffle(a);
        sort(a);
    }

    static void rsort(long[] a) {
        shuffle(a);
        sort(a);
    }

    static void rsort(double[] a) {
        shuffle(a);
        sort(a);
    }

    static int[] copy(int[] a) {
        int[] ans = new int[a.length];
        for (int i = 0; i < a.length; ++i) ans[i] = a[i];
        return ans;
    }

    static long[] copy(long[] a) {
        long[] ans = new long[a.length];
        for (int i = 0; i < a.length; ++i) ans[i] = a[i];
        return ans;
    }

    static double[] copy(double[] a) {
        double[] ans = new double[a.length];
        for (int i = 0; i < a.length; ++i) ans[i] = a[i];
        return ans;
    }

    static char[] copy(char[] a) {
        char[] ans = new char[a.length];
        for (int i = 0; i < a.length; ++i) ans[i] = a[i];
        return ans;
    }

    // input
    static void r() throws IOException {
        input = new StringTokenizer(rline());
    }

    static int ri() throws IOException {
        return Integer.parseInt(rline());
    }

    static long rl() throws IOException {
        return Long.parseLong(rline());
    }

    static double rd() throws IOException {
        return Double.parseDouble(rline());
    }

    static int[] ria(int n) throws IOException {
        int[] a = new int[n];
        r();
        for (int i = 0; i < n; ++i) a[i] = ni();
        return a;
    }

    static int[] riam1(int n) throws IOException {
        int[] a = new int[n];
        r();
        for (int i = 0; i < n; ++i) a[i] = ni() - 1;
        return a;
    }

    static long[] rla(int n) throws IOException {
        long[] a = new long[n];
        r();
        for (int i = 0; i < n; ++i) a[i] = nl();
        return a;
    }

    static double[] rda(int n) throws IOException {
        double[] a = new double[n];
        r();
        for (int i = 0; i < n; ++i) a[i] = nd();
        return a;
    }

    static char[] rcha() throws IOException {
        return rline().toCharArray();
    }

    static String rline() throws IOException {
        return __i.readLine();
    }

    static String n() {
        return input.nextToken();
    }

    static int rni() throws IOException {
        r();
        return ni();
    }

    static int ni() {
        return Integer.parseInt(n());
    }

    static long rnl() throws IOException {
        r();
        return nl();
    }

    static long nl() {
        return Long.parseLong(n());
    }

    static double rnd() throws IOException {
        r();
        return nd();
    }

    static double nd() {
        return Double.parseDouble(n());
    }

    // output
    static void pr(int i) {
        __o.print(i);
    }

    static void prln(int i) {
        __o.println(i);
    }

    static void pr(long l) {
        __o.print(l);
    }

    static void prln(long l) {
        __o.println(l);
    }

    static void pr(double d) {
        __o.print(d);
    }

    static void prln(double d) {
        __o.println(d);
    }

    static void pr(char c) {
        __o.print(c);
    }

    static void prln(char c) {
        __o.println(c);
    }

    static void pr(char[] s) {
        __o.print(new String(s));
    }

    static void prln(char[] s) {
        __o.println(new String(s));
    }

    static void pr(String s) {
        __o.print(s);
    }

    static void prln(String s) {
        __o.println(s);
    }

    static void pr(Object o) {
        __o.print(o);
    }

    static void prln(Object o) {
        __o.println(o);
    }

    static void prln() {
        __o.println();
    }

    static void pryes() {
        prln("yes");
    }

    static void pry() {
        prln("Yes");
    }

    static void prY() {
        prln("YES");
    }

    static void prno() {
        prln("no");
    }

    static void prn() {
        prln("No");
    }

    static void prN() {
        prln("NO");
    }

    static boolean pryesno(boolean b) {
        prln(b ? "yes" : "no");
        return b;
    }

    ;

    static boolean pryn(boolean b) {
        prln(b ? "Yes" : "No");
        return b;
    }

    static boolean prYN(boolean b) {
        prln(b ? "YES" : "NO");
        return b;
    }

    static void prln(int... a) {
        for (int i = 0, len = a.length - 1; i < len; pr(a[i]), pr(' '), ++i) ;
        if (a.length > 0) prln(a[a.length - 1]);
        else prln();
    }

    static void prln(long... a) {
        for (int i = 0, len = a.length - 1; i < len; pr(a[i]), pr(' '), ++i) ;
        if (a.length > 0) prln(a[a.length - 1]);
        else prln();
    }

    static void prln(double... a) {
        for (int i = 0, len = a.length - 1; i < len; pr(a[i]), pr(' '), ++i) ;
        if (a.length > 0) prln(a[a.length - 1]);
        else prln();
    }

    static <T> void prln(Collection<T> c) {
        int n = c.size() - 1;
        Iterator<T> iter = c.iterator();
        for (int i = 0; i < n; pr(iter.next()), pr(' '), ++i) ;
        if (n >= 0) prln(iter.next());
        else prln();
    }

    static void h() {
        prln("hlfd");
        flush();
    }

    static void flush() {
        __o.flush();
    }

    static void close() {
        __o.close();
    }
}