結果
問題 | No.399 動的な領主 |
ユーザー | toma |
提出日時 | 2019-10-02 17:51:54 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 750 ms / 2,000 ms |
コード長 | 7,047 bytes |
コンパイル時間 | 2,159 ms |
コンパイル使用メモリ | 192,160 KB |
実行使用メモリ | 22,912 KB |
最終ジャッジ日時 | 2024-10-03 06:01:41 |
合計ジャッジ時間 | 10,571 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,820 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 5 ms
5,248 KB |
testcase_05 | AC | 52 ms
5,376 KB |
testcase_06 | AC | 750 ms
21,760 KB |
testcase_07 | AC | 702 ms
21,888 KB |
testcase_08 | AC | 733 ms
21,888 KB |
testcase_09 | AC | 717 ms
22,016 KB |
testcase_10 | AC | 6 ms
5,248 KB |
testcase_11 | AC | 34 ms
5,376 KB |
testcase_12 | AC | 495 ms
22,784 KB |
testcase_13 | AC | 514 ms
22,912 KB |
testcase_14 | AC | 168 ms
22,624 KB |
testcase_15 | AC | 272 ms
22,656 KB |
testcase_16 | AC | 373 ms
22,148 KB |
testcase_17 | AC | 724 ms
21,888 KB |
testcase_18 | AC | 721 ms
21,888 KB |
ソースコード
#include"bits/stdc++.h" using namespace std; #define REP(k,m,n) for(int (k)=(m);(k)<(n);(k)++) #define rep(i,n) REP((i),0,(n)) using ll = long long; using Graph = vector<vector<int>>; struct HLDecomposition { using pii = pair<int, int>; int n; Graph G; vector<int> vid, inv, par, depth, subsize, head, prev, next, type; HLDecomposition(const Graph& G_) : n(G_.size()), G(G_), vid(n, -1), inv(n), par(n), depth(n), subsize(n, 1), head(n), prev(n, -1), next(n, -1), type(n) {} void build(vector<int> roots = { 0 }) { int curtype = 0, pos = 0; for (int root : roots) { decide_heavy_edge(root); reconstruct(root, curtype++, pos); } } void decide_heavy_edge(int root) { stack<pii> st; par[root] = -1, depth[root] = 0; st.emplace(root, 0); while (!st.empty()) { int now = st.top().first; int& way = st.top().second; if (way < G[now].size()) { int child = G[now][way++]; if (child == par[now])continue; par[child] = now; depth[child] = depth[now] + 1; st.emplace(child, 0); } else { st.pop(); int maxsize = 0; for (auto child : G[now]) { if (child == par[now])continue; subsize[now] += subsize[child]; if (maxsize < subsize[child]) { maxsize = subsize[child]; prev[child] = now; next[now] = child; } } } } } void reconstruct(int root, int curtype, int& pos) { stack<int> st({ root }); while (!st.empty()) { int start = st.top(); st.pop(); for (int v = start; v != -1; v = next[v]) { type[v] = curtype; vid[v] = pos++; inv[vid[v]] = v; head[v] = start; for (auto child : G[v]) { if (child != par[v] && child != next[v]) { st.push(child); } } } } } // node query [u, v], f([left, right]) void foreach_nodes(int u, int v, const function<void(int, int)>& f) { while (true) { if (vid[u] > vid[v])swap(u, v); f(max(vid[head[v]], vid[u]), vid[v]); if (head[u] != head[v])v = par[head[v]]; else break; } } // edge query[u,v] f([left, right]) // seg_node[vid[i]] := edge(par[i] -> i) void foreach_edges(int u, int v, const function<void(int, int)>& f) { while (true) { if (vid[u] > vid[v])swap(u, v); if (head[u] != head[v]) { f(vid[head[v]], vid[v]); v = par[head[v]]; } else { if (u != v)f(vid[u] + 1, vid[v]); break; } } } int lca(int u, int v) { while (true) { if (vid[u] > vid[v])swap(u, v); if (head[u] == head[v])return u; v = par[head[v]]; } } }; template<typename Monoid, typename OperatorMonoid = Monoid> class LazySegmentTree { private: using F = function<Monoid(Monoid, Monoid)>; using G = function<Monoid(Monoid, OperatorMonoid, int)>; using H = function<OperatorMonoid(OperatorMonoid, OperatorMonoid)>; int sz; // 対応する配列の幅 vector<Monoid> data; vector<OperatorMonoid> lazy; const F f; // 2区間マージ演算(data-data-ボトムアップマージ) const G g; // 要素,作用素マージ演算(lazy->data同位置変換時の、(data,lazy,len)の計算) const H h; // 作用素マージ演算 (query->lazyトップダウン伝搬時の、(lazy,query_value)の計算) const Monoid M1; // モノイド単位元 (data単位元) const OperatorMonoid OM0; // 作用素単位元 (lazy単位元) void propagate(int idx, int len) { // 幅lenのlazy[idx]が存在するとき、値を下に流す if (lazy[idx] != OM0) { if (idx < sz) { lazy[(idx << 1) | 0] = h(lazy[(idx << 1) | 0], lazy[idx]); lazy[(idx << 1) | 1] = h(lazy[(idx << 1) | 1], lazy[idx]); } data[idx] = g(data[idx], lazy[idx], len); lazy[idx] = OM0; } } Monoid update_impl(int a, int b, const OperatorMonoid& val, int idx, int l, int r) { propagate(idx, r - l); if (r <= a || b <= l)return data[idx]; else if (a <= l && r <= b) { lazy[idx] = h(lazy[idx], val); propagate(idx, r - l); return data[idx]; } else return data[idx] = f( update_impl(a, b, val, (idx << 1) | 0, l, (l + r) >> 1), update_impl(a, b, val, (idx << 1) | 1, (l + r) >> 1, r) ); } Monoid query_impl(int a, int b, int idx, int l, int r) { propagate(idx, r - l); if (r <= a || b <= l)return M1; else if (a <= l && r <= b)return data[idx]; else return f( query_impl(a, b, (idx << 1) | 0, l, (l + r) >> 1), query_impl(a, b, (idx << 1) | 1, (l + r) >> 1, r) ); } public: // init忘れに注意 LazySegmentTree(int n, const F f, const G g, const H h, const Monoid& M1, const OperatorMonoid OM0) :f(f), g(g), h(h), M1(M1), OM0(OM0) { sz = 1; while (sz < n)sz <<= 1; data.assign(2 * sz, M1); lazy.assign(2 * sz, OM0); } void build(const vector<Monoid>& vals) { rep(idx, vals.size())data[idx + sz] = vals[idx]; for (int idx = sz - 1; idx > 0; idx--) { data[idx] = f(data[(idx << 1) | 0], data[(idx << 1) | 1]); } } Monoid update(int a, int b, const OperatorMonoid& val) { return update_impl(a, b, val, 1, 0, sz); } Monoid query(int a, int b) { return query_impl(a, b, 1, 0, sz); } Monoid operator[](const int& idx) { return query(idx, idx + 1); } }; int main() { int N, Q; cin >> N; Graph graph(N); rep(i, N - 1) { int u, v; cin >> u >> v; u--; v--; graph[u].push_back(v); graph[v].push_back(u); } auto f = [](ll vl, ll vr) {return vl + vr; }; auto g = [](ll data, ll lazy, int len) {return data + lazy * len; }; auto h = [](ll lazy, ll query) {return lazy + query; }; LazySegmentTree<ll> lst(N, f, g, h, 0, 0); HLDecomposition hld(graph); hld.build(); ll res = 0; cin >> Q; rep(i, Q) { int A, B; cin >> A >> B; A--; B--; hld.foreach_nodes(A, B, [&](int l, int r) { lst.update(l, r + 1, 1); ll tres = lst.query(l, r + 1); res += tres; }); } cout << res << endl; return 0; }