#include<bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5;

vector<int> v[N];
int colour[N];
int ret[N];
map<int, int> sets[N];
vector<pair<int, int>> store[N];

void dfs(int sv, int par)
{
    for(int x : v[sv])
    {
        if(x == par)
        {
            continue;
        }
        dfs(x, sv);
        for(pair<int, int> el : sets[x])
        {
            sets[sv][el.first] += el.second;
        }
    }
    for(pair<int, int> x : store[sv])
    {
        ret[x.second] = sets[sv][x.first];
    }
}

int32_t main()
{
    ios_base:: sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    #ifndef ONLINE_JUDGE
      freopen("input.txt", "r", stdin);
      freopen("output.txt", "w", stdout);
    #endif
    int n, root, query;
    cin >> n >> query >> root;
    for(int i = 0; i < n - 1; i++)
    {
        int a, b;
        cin >> a >> b;
        v[a].push_back(b);
        v[b].push_back(a);
    }
    for(int i = 1; i <= n; i++)
    {
        cin >> colour[i];
        sets[i][colour[i]]++;
    }
    for(int i = 1; i <= query; i++)
    {
        int node, colour;
        cin >> node >> colour;
        store[node].push_back({colour, i});
    }
    dfs(root, 0);
    for(int i = 1; i <= n; i++)
    {
        cout << ret[i] << " ";
    }
}