結果
問題 | No.899 γatheree |
ユーザー |
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提出日時 | 2019-10-04 22:50:55 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 229 ms / 2,000 ms |
コード長 | 4,185 bytes |
コンパイル時間 | 2,003 ms |
コンパイル使用メモリ | 184,596 KB |
実行使用メモリ | 19,496 KB |
最終ジャッジ日時 | 2024-10-03 08:20:13 |
合計ジャッジ時間 | 7,044 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 23 |
コンパイルメッセージ
main.cpp:14:27: warning: use of 'auto' in parameter declaration only available with '-std=c++20' or '-fconcepts' 14 | bool operator==(const auto& r) const { return p == r.p and q == r.q; } | ^~~~
ソースコード
#include <bits/stdc++.h>using namespace std;using lint = long long;template<class T = int> using V = vector<T>;template<class T = int> using VV = V< V<T> >;struct SegmentTree {using D = lint;using T = struct { D sum, sz; };static T op(const T& a, const T& b) { return {a.sum + b.sum, a.sz + b.sz}; }static constexpr T e() { return {0, 0}; }using U = struct {D p, q;bool operator==(const auto& r) const { return p == r.p and q == r.q; }};static void ap(const U& f, T& a) { a.sum = f.p * a.sum + f.q * a.sz; }static void cp(const U& g, U& f) { f.p *= g.p, f.q = g.p * f.q + g.q; }static constexpr U id() { return {1, 0}; }D sum(int l, int r) { return acc(l, r).sum; }void add(int l, int r, D x) { act(l, r, {1, x}); }void mul(int l, int r, D x) { act(l, r, {x, 0}); }void update(int l, int r, D x) { act(l, r, {0, x}); }const int n;V<T> t;V<U> u;SegmentTree(int n) : n(n), t(2 * n, e()), u(n, id()) {}T& operator[](int i) { return t[i + n]; }void build() { for (int i = n - 1; i; --i) t[i] = op(t[2 * i], t[2 * i + 1]); }void push() { for (int i = 1; i < n; ++i) push(i); }void apply(const U& f, int i) {ap(f, t[i]);if (i < n) cp(f, u[i]);}void push(int i) {if (u[i] == id()) return;apply(u[i], 2 * i);apply(u[i], 2 * i + 1);u[i] = id();}void push(int l, int r) {for (int hl = __lg(l + n), hr = __lg(r - 1 + n); hr > 0; --hl, --hr) {int al = l + n >> hl, ar = r - 1 + n >> hr;if (al < n) push(al);if (ar != al) push(ar);}}T acc(int l, int r) {push(l, r);T resl = e(), resr = e();for (l += n, r += n; l < r; l >>= 1, r >>= 1) {if (l & 1) resl = op(resl, t[l++]);if (r & 1) resr = op(t[--r], resr);}return op(resl, resr);}T get(int i) { return acc(i, i + 1); }void act(int l, int r, const U& f) {push(l, r);for (int i = l + n, j = r + n; i < j; i >>= 1, j >>= 1) {if (i & 1) apply(f, i++);if (j & 1) apply(f, --j);}l = l + n >> __builtin_ctz(l + n);while (l >>= 1) t[l] = op(t[2 * l], t[2 * l + 1]);r = r + n >> __builtin_ctz(r + n);while (r >>= 1) t[r] = op(t[2 * r], t[2 * r + 1]);}void set(int i, const T& a) {push(i, i + 1);t[i += n] = a;while (i >>= 1) t[i] = op(t[2 * i], t[2 * i + 1]);}};int main() {cin.tie(nullptr); ios::sync_with_stdio(false);int n; cin >> n;VV<> g(n);for (int _ = 0; _ < n - 1; ++_) {int u, v; cin >> u >> v;g[u].push_back(v);g[v].push_back(u);}VV<> ch(n);V<> par(n);auto dfs = [&](const auto& dfs, int v, int p) -> void {par[v] = p;for (int u : g[v]) if (u != p) {ch[v].push_back(u);dfs(dfs, u, v);}};dfs(dfs, 0, -1);queue<int> que;que.push(0);int t = 0;V<> ord(n);while (!que.empty()) {int v = que.front(); que.pop();ord[v] = t++;for (int u : ch[v]) {que.push(u);}}SegmentTree st(n);for (int v = 0; v < n; ++v) {int a; cin >> a;st[ord[v]] = {a, 1};}st.build();V<> l(n, n), r(n, -1);for (int v = 0; v < n; ++v) {int p = v;bool ok = true;for (int _ = 0; _ < 2; ++_) if (par[p] != -1) {p = par[p];} else {ok = false;break;}if (!ok) continue;l[p] = min(l[p], ord[v]);r[p] = max(r[p], ord[v]);}int q; cin >> q;while (q--) {int v; cin >> v;int p = v;lint res = 0;for (int _ = 0; _ < 2; ++_) if (par[p] != -1) {p = par[p];res += st.get(ord[p]).sum;st.set(ord[p], {0, 1});}if (!ch[v].empty()) {res += st.acc(ord[ch[v][0]], ord[ch[v].back()] + 1).sum;st.act(ord[ch[v][0]], ord[ch[v].back()] + 1, {0, 0});}if (l[v] <= r[v]) {res += st.acc(l[v], r[v] + 1).sum;st.act(l[v], r[v] + 1, {0, 0});}if (par[v] != -1) {res += st.acc(ord[ch[par[v]][0]], ord[ch[par[v]].back()] + 1).sum;st.act(ord[ch[par[v]][0]], ord[ch[par[v]].back()] + 1, {0, 0});} else {res += st.get(ord[v]).sum;}st.set(ord[v], {res, 1});cout << res << '\n';}}