結果
問題 | No.235 めぐるはめぐる (5) |
ユーザー | toma |
提出日時 | 2019-10-02 18:50:54 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,788 ms / 10,000 ms |
コード長 | 8,468 bytes |
コンパイル時間 | 2,030 ms |
コンパイル使用メモリ | 196,600 KB |
実行使用メモリ | 52,068 KB |
最終ジャッジ日時 | 2024-10-03 06:02:12 |
合計ジャッジ時間 | 10,490 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 | 1,788 ms
50,732 KB |
testcase_01 | AC | 1,218 ms
52,068 KB |
testcase_02 | AC | 1,603 ms
51,004 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; vector<pair<ll, ll>> sc(N); Graph graph(N); rep(i, N)cin >> sc[i].first; rep(i, N)cin >> sc[i].second; rep(i, N - 1) { int a, b; cin >> a >> b; a--; b--; graph[a].push_back(b); graph[b].push_back(a); } // 金額和, 倍率和 using pll = pair<ll, ll>; constexpr ll MOD = 1000000007; auto f = [&](pll vl, pll vr) { return make_pair( (vl.first + vr.first) % MOD, (vl.second + vr.second) % MOD ); }; auto g = [&](pll data, ll lazy, int len) { return make_pair( (data.first + data.second*lazy) % MOD, data.second ); }; auto h = [&](ll lazy, ll query) { return (lazy + query) % MOD; }; LazySegmentTree<pll, ll> lst(N, f, g, h, { 0ll,0ll }, 0); HLDecomposition hld(graph); hld.build(); vector<pll> nsc(N); rep(i, N) { nsc[hld.vid[i]] = sc[i]; } lst.build(nsc); cin >> Q; rep(q, Q) { /* vector<pll> par(N); rep(i, N)par[i] = make_pair(hld.vid[i], i); sort(par.begin(), par.end()); rep(i, N) { // vid -> normal id -> cost -> parent -> size int nid = par[i].second; assert(hld.inv[i] == nid); cerr << i << ":" << par[i].second << "..." << lst[i].first << "..." << hld.par[i] << "..." << hld.subsize[i] << endl; } */ int type, x, y, z; cin >> type >> x >> y; x--; y--; if (type == 0) { cin >> z; hld.foreach_nodes(x, y, [&](int l, int r) { //cerr << l << "..." << r << endl; lst.update(l, r + 1, z); }); } else { ll res = 0; hld.foreach_nodes(x, y, [&](int l, int r) { //cerr << l << "..." << r << endl; (res += lst.query(l, r + 1).first) %= MOD; }); cout << res << endl; } } return 0; }