結果
問題 | No.1030 だんしんぐぱーりない |
ユーザー |
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提出日時 | 2020-04-18 12:38:50 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 373 ms / 2,000 ms |
コード長 | 5,888 bytes |
コンパイル時間 | 3,179 ms |
コンパイル使用メモリ | 213,328 KB |
最終ジャッジ日時 | 2025-01-09 21:09:33 |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 40 |
ソースコード
#include<bits/stdc++.h> #define rep(i,a,b) for(int i=a;i<b;i++) #define rrep(i,a,b) for(int i=a;i>=b;i--) #define fore(i,a) for(auto &i:a) #define all(x) (x).begin(),(x).end() //#pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60; template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; } template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; } //--------------------------------------------------------------------------------------------------- struct HLDecomposition { vector<set<int>> g; vector<int> vid, head, heavy, parent, depth, inv, in, out; HLDecomposition() {} HLDecomposition(int n) { init(n); } void init(int n) { g.resize(n); vid.resize(n, -1); head.resize(n); heavy.resize(n, -1); parent.resize(n); depth.resize(n); inv.resize(n); in.resize(n); out.resize(n); } void add(int u, int v) { g[u].insert(v); g[v].insert(u); } void build(int root) { dfs(root, -1); t = 0; dfs_hld(root); } int dfs(int curr, int prev) { parent[curr] = prev; int sub = 1, max_sub = 0; heavy[curr] = -1; for (int next : g[curr]) if (next != prev) { depth[next] = depth[curr] + 1; int sub_next = dfs(next, curr); sub += sub_next; if (max_sub < sub_next) max_sub = sub_next, heavy[curr] = next; }return sub; } int t = 0; void dfs_hld(int v = 0) { vid[v] = in[v] = t; t++; inv[in[v]] = v; if (0 <= heavy[v]) { head[heavy[v]] = head[v]; dfs_hld(heavy[v]); } for (auto u : g[v]) if(depth[v] < depth[u]) if (u != heavy[v]) { head[u] = u; dfs_hld(u); } out[v] = t; } void foreach(int u, int v, function<void(int, int)> f) { // [x,y] if (vid[u] > vid[v]) swap(u, v); f(max(vid[head[v]], vid[u]), vid[v]); if (head[u] != head[v]) foreach(u, parent[head[v]], f); } int ancestor(int from, int times) { while (true) { if (depth[head[from]] > depth[from] - times) { times -= depth[from] - depth[head[from]] + 1; if (head[from] == 0)return -1; from = parent[head[from]]; } else return inv[vid[from] - times]; } } int lca(int u, int v) { if (vid[u] > vid[v]) swap(u, v); if (head[u] == head[v]) return u; return lca(u, parent[head[v]]); } int distance(int u, int v) { return depth[u] + depth[v] - 2 * depth[lca(u, v)]; } int child(int parent, int child, int times) { assert(depth[parent]<depth[child]); int d = distance(parent, child); assert(times - 1 <= d); return ancestor(child, d - times); } int go(int from, int to, int times) { int d = distance(from, to); assert(0 <= times and times <= d); int lc = lca(from, to); if (lc == to)return ancestor(from, times); if (lc == from)return child(from, to, times); int dd = distance(from, lc); if (dd <= times)return go(lc, to, times - dd); return ancestor(from, times); } }; HLDecomposition hld; #define def -1 template<class V, int NV> struct SegTree { //[l,r) V comp(V& l, V& r) { if (l < 0) return r; if (r < 0) return l; return hld.lca(l, r); }; vector<V> val; SegTree() { val = vector<V>(NV * 2, def); } V get(int x, int y, int l = 0, int r = NV, int k = 1) { if (r <= x || y <= l)return def; if (x <= l && r <= y)return val[k]; auto a = get(x, y, l, (l + r) / 2, k * 2); auto b = get(x, y, (l + r) / 2, r, k * 2 + 1); return comp(a, b); } void update(int i, V v) { i += NV; val[i] = v; while (i > 1) i >>= 1, val[i] = comp(val[i * 2], val[i * 2 + 1]); } void add(int i, V v) { update(i, val[i + NV] + v); } V operator[](int x) { return get(x, x + 1); } }; /*--------------------------------------------------------------------------------------------------- ∧_∧ ∧_∧ (´<_` ) Welcome to My Coding Space! ( ´_ゝ`) / ⌒i @hamayanhamayan0 / \ | | / / ̄ ̄ ̄ ̄/ | __(__ニつ/ _/ .| .|____ \/____/ (u ⊃ ---------------------------------------------------------------------------------------------------*/ int N, K, Q; int C[101010], A[101010]; vector<int> E[101010]; SegTree<int, 1 << 17> st; //--------------------------------------------------------------------------------------------------- void dfs(int cu, int pa = -1) { fore(to, E[cu]) if (to != pa) { chmax(C[to], C[cu]); dfs(to, cu); } } //--------------------------------------------------------------------------------------------------- void _main() { cin >> N >> K >> Q; rep(i, 0, N) cin >> C[i]; rep(i, 0, K) cin >> A[i]; hld.init(N); rep(i, 0, N - 1) { int a, b; cin >> a >> b; a--; b--; E[a].push_back(b); E[b].push_back(a); hld.add(a, b); } hld.build(0); dfs(0); rep(i, 0, K) st.update(i, A[i] - 1); rep(_, 0, Q) { int T; cin >> T; if (T == 1) { int X, Y; cin >> X >> Y; X--; Y--; st.update(X, Y); } else { int L, R; cin >> L >> R; L--; int ans = C[st.get(L, R)]; printf("%d\n", ans); } } }