#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int MAXN = 200'001;

vector<int> g[MAXN];
int d[MAXN], timer = 1, tree[8*MAXN], lazy[8*MAXN], tin[MAXN], tout[MAXN], siz[MAXN], cnt[8*MAXN];

void push(int v) {
    if (lazy[v]) {
        tree[v] = cnt[v] - tree[v];
        lazy[2*v] ^= 1;
        lazy[2*v+1] ^= 1;
        lazy[v] = 0;
    }
}

void upd(int v, int tl, int tr, int l, int r) {
    if (l > r) return;
    push(v);
    if (l == tl && r == tr) {
        lazy[v] ^= 1;
        push(v);
    } else {
        int tm = (tl + tr) / 2;
        upd(2*v, tl, tm, l, min(tm, r));
        upd(2*v+1, tm+1, tr, max(tm+1, l), r);
        push(2*v);
        push(2*v+1);
        tree[v] = tree[2*v] + tree[2*v+1];
    }
}

void upd2(int v, int tl, int tr, int pos) {
    if (tl == tr) {
        cnt[v] = 1;
    } else {
        int tm = (tl + tr) / 2;
        if (pos <= tm) {
            upd2(2*v, tl, tm, pos);
        } else {
            upd2(2*v+1, tm+1, tr, pos);
        }
        cnt[v] = cnt[2*v] + cnt[2*v+1];
    }
}

void dfs(int u) {
    siz[u] = 1;
    tin[u] = timer++;
    for (int v : g[u]) {
        d[v] ^= d[u];
        dfs(v);
        siz[u] += siz[v];
    }
    tout[u] = timer++;
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int n, q; cin >> n >> q;
    for (int i = 2; i <= n; i++) {
        int x; cin >> x;
        g[x].emplace_back(i);
    }
    for (int i = 2; i <= n; i++) {
        int x; cin >> x;
        d[i] ^= x;
    }
    dfs(1);

    for (int i = 1; i <= n; i++) {
        upd2(1, 1, 2*n, tin[i]);
    }
    for (int i = 1; i <= n; i++) {
        if (d[i]) {
            upd(1, 1, 2*n, tin[i], tin[i]);
        }
    }
    ll ans = 0;
    {
        int ones = tree[1];
        int zeros = n-ones;
        for (int i = 1; i <= n; i++) {
            if (d[i]) {
                ans += ones-1;
            } else {
                ans += zeros-1;
            }
        }
    }
    ans /= 2;
    cout << ans << " ";
    while (q--) {
        int x; cin >> x; x++;
        ll tones = tree[1];
        ll tzeros = n-tones;
        ll ones = qry(1, 1, 2*n, tin[x], tout[x]);
        ll zeros = siz[x] - ones;
        ans -= ones * (tones - ones);
        ans -= zeros * (tzeros - zeros);
        ans += ones * (tzeros - zeros);
        ans += zeros * (tones - ones);

        upd(1, 1, 2*n, tin[x], tout[x]);
        cout << ans << " ";
    }
    cout << "\n";
    return 0;
}