71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
#include "../include.hh"
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int main() {
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untie;
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read(int, n);
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adj(ch, n);
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for (int i = 0; i < n - 1; ++i) {
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read(int, u, v);
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edge(ch, u, v);
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}
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readvec(int, c, n); // WARNING
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vector<int> size(n + 1);
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vector<int> heavy(n + 1);
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auto dfs = [&] (auto dfs, int v, int pa) -> int {
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size[v] = 1;
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for (auto&& u : ch[v]) {
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if (u != pa) {
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int curr = dfs(dfs, u, v);
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size[v] += curr;
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if (curr > size[heavy[v]]) heavy[v] = u;
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}
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}
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return size[v];
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};
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dfs(dfs, 1, 0);
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vector<int> cnt(n + 1);
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vector<int> res(n + 1);
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auto remove = [&] (auto remove, int v, int pa) -> void {
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cnt[c[v-1]] -= 1;
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for (auto&& u : ch[v]) if (u != pa) remove(remove, u, v);
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};
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auto dfs2 = [&] (auto dfs2, int v, int pa, int update_ans, int write_cnt) -> int {
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if (!v) return 0;
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if (update_ans) {
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for (auto&& u : ch[v]) {
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if (u != pa && u != heavy[v]) dfs2(dfs2, u, v, 1, 0);
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}
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}
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int ans = dfs2(dfs2, heavy[v], v, update_ans, 1);
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for (auto&& u : ch[v]) {
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if (u != pa && u != heavy[v]) ans += dfs2(dfs2, u, v, 0, 1);
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}
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if (!cnt[c[v-1]]) {
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cnt[c[v-1]] = 1;
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++ans;
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} else {
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cnt[c[v-1]] += 1;
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}
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// debugvec(cnt);
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if (!write_cnt) {
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remove(remove, v, pa);
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}
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if (update_ans) {
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res[v] = ans;
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}
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return ans;
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};
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dfs2(dfs2, 1, 0, 1, 1);
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read(int, m);
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while(m--) {
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read(int, q);
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cout << res[q] << endl;
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}
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}
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