XXX on tree

%了发树上莫队

nlognsqrt(n)

// luogu-judger-enable-o2
#include<bits/stdc++.h>
using namespace std;
inline int read() {
    int x = 0,f = 1;
    char c = getchar();
    while(c < '0' || c > '9')c = getchar();
    while(c <= '9' && c >= '0')x = x * 10 + c - '0',c=  getchar();
    return x * f;
}
const int maxn = 100007;
int n ,block,fa[maxn],siz[maxn],son[maxn],num = 0,a[maxn],out[maxn];
vector<int>v[maxn];
int dfn[maxn];
void dfs(int x,int f) {
    fa[x] = f; siz[x] = 1;
    dfn[x] = ++ num;
    for(int i = 0;i < v[x].size();++ i) {
        int V = v[x][i];
        if(siz[V]) continue;
        dfs(V,x);
        siz[x] += siz[V];
        if(siz[V] > siz[son[x]]) son[x] = V;
    }
}
int happen[maxn],belong[maxn];
int ans = 0,totq = 0; 

struct Query {
	int l,r,id,ans;
	Query(int L = 0,int R = 0,int Id = 0,int Ans = 0): l(L) , r(R), id(Id),ans(Ans) {};
	bool operator < (const Query &a) const {
		return belong[l] == belong[a.l] ? r < a.r : belong[l] < belong[a.l];
	}
}q[maxn]; 

void delet(int x) {
    if(-- happen[x] == 0) ans --;
}
void add(int x) {
    if(++ happen[x] == 1) ans ++;
}
void mo() {
    sort(q + 1,q + totq + 1);
    int l = 1,r = 0,fuck = 0;
    for(int i = 1;i <= totq;++ i) {
        while(l < q[i].l) delet(a[l ++]);
        while(l > q[i].l) add(a[-- l]);
        while(r < q[i].r) add(a[++ r]);
        while(r > q[i].r) delet(a[r --]);
        q[i].ans = ans;
    }
    for(int i = 1;i <= totq;++ i)
    out[q[i].id] = q[i].ans;
}
int que,ask[maxn];
void dealask() {
    que = read();
    for(int i = 1;i <= que;++ i) {
        ask[i] = read();
        for(int j = 0;j < v[ask[i]].size();++ j) {
            int V = v[ask[i]][j];
            if(V == fa[ask[i]]) continue;
            q[++ totq] = Query(dfn[V],dfn[V] + siz[V] - 1,V,0);
        }
    }
}
int data[maxn];
int main() {
    n = read();
    block = sqrt(n);
    for(int i = 1;i <= n;++ i) a[i] = data[i] = read(), belong[i] = i / block + 1;
    sort(data + 1,data + n + 1);
    num = unique(data + 1,data + n + 1) - data - 1;
    for(int i = 1;i <= n;++ i) a[i] = lower_bound(data + 1,data + num + 1,a[i]) - data;
    for(int u,V,i = 1;i < n;++ i) {
        u = read(),V = read() ;
        v[u].push_back(V);
		v[V].push_back(u);
    }
    num = 0;
    dfs(1,0);
    dealask();
    mo();
	for(int i = 1;i <= que;++ i) {
		int mx = 0,id = 0;
		for(int j = 0 ;j < v[ask[i]].size(); ++ j) {
			int to = v[ask[i]][j];
			if(to == fa[ask[i]]) continue;
			if(out[to] > mx || (siz[to] > siz[id] && out[to] == mx)) mx = out[to]; 

		} 	printf("%d\n",siz[id]);
	}
	return 0;
}