#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

vector<vector<ll>> csucsok;
vector<ll> tin, tout;
ll ido;

void dfs(ll akt){
    tin[akt] = ido;
    ido++;

    for(ll x : csucsok[akt]){
        dfs(x);
    }

    tout[akt] = ido;
    ido++;
}

struct segTree{
    ll meret = 1;
    vector<ll> fa;
    vector<bool> csere;

    void meretez(ll n){
        while(meret < n){
            meret *= 2;
        }

        fa.assign(2*meret - 1, 0);
        csere.assign(2*meret - 1, 0);
    }

    ll keres(ll a, ll b, ll ind, ll kezd, ll veg){
        if(veg < kezd){
            return 0;
        }
        if(veg < a || b < kezd){
            return 0;
        } else if(kezd <= a && b <= veg){
            return fa[ind];
        }

        ll k = (a + b) / 2;

        ll akt = keres(a, k, 2*ind +1, kezd, veg) + keres(k + 1, b, 2*ind + 2, kezd, veg);

        if(csere[ind]){
            akt = (b - a + 1) - akt;
        }

        return akt;
    }

    ll valt(ll a, ll b, ll ind, ll kezd, ll veg){
        if(veg < a || b < kezd){
            return fa[ind];
        } else if(kezd <= a && b <= veg){
            fa[ind] = (b - a + 1) - fa[ind];
            csere[ind] = !csere[ind];
            return fa[ind];
        }

        ll k = (a + b) / 2;

        fa[ind] = valt(a, k, 2*ind + 1, kezd, veg) + valt(k + 1, b, 2*ind + 2, kezd, veg);

        if(csere[ind]){
            fa[ind] = (b - a + 1) - fa[ind];
        }

        return fa[ind];
    }
};

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    ll n, q;
    cin >> n >> q;

    csucsok.assign(n, vector<ll>());
    tin.assign(n, 0);
    tout.assign(n, 0);

    for(ll i = 1; i < n; i++){
        ll a;
        cin >> a;
        a--;

        csucsok[a].push_back(i);
    }

    dfs(0);

    segTree fa;
    fa.meretez(2*n);

    for(ll i = 1; i < n; i++){
        ll a;
        cin >> a;

        if(a){
            fa.valt(0, fa.meret - 1, 0, tin[i], tout[i]);
        }

    }

    ll ps = fa.fa[0]/2;
    ll pt = n - ps;

    cout << (ps*(ps - 1) + pt*(pt - 1))/2 << " ";

    while(q--){
        ll a;
        cin >> a;

        fa.valt(0, fa.meret - 1, 0, tin[a], tout[a]);

        ps = fa.fa[0]/2;
        pt = n - ps;
        cout << (ps*(ps - 1) + pt*(pt - 1))/2 << " ";
    }
    cout << "\n";
}