結果
問題 | No.2634 Tree Distance 3 |
ユーザー | 👑 emthrm |
提出日時 | 2024-02-16 23:47:31 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 6,149 bytes |
コンパイル時間 | 4,019 ms |
コンパイル使用メモリ | 290,196 KB |
実行使用メモリ | 58,472 KB |
最終ジャッジ日時 | 2024-09-28 22:52:56 |
合計ジャッジ時間 | 14,901 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
(要ログイン)
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 | TLE | - |
testcase_01 | -- | - |
testcase_02 | -- | - |
testcase_03 | -- | - |
testcase_04 | -- | - |
testcase_05 | -- | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
testcase_32 | -- | - |
testcase_33 | -- | - |
testcase_34 | -- | - |
testcase_35 | -- | - |
testcase_36 | -- | - |
testcase_37 | -- | - |
testcase_38 | -- | - |
testcase_39 | -- | - |
testcase_40 | -- | - |
testcase_41 | -- | - |
testcase_42 | -- | - |
testcase_43 | -- | - |
testcase_44 | -- | - |
testcase_45 | -- | - |
testcase_46 | -- | - |
testcase_47 | -- | - |
testcase_48 | -- | - |
testcase_49 | -- | - |
testcase_50 | -- | - |
testcase_51 | -- | - |
testcase_52 | -- | - |
testcase_53 | -- | - |
testcase_54 | -- | - |
testcase_55 | -- | - |
testcase_56 | -- | - |
testcase_57 | -- | - |
testcase_58 | -- | - |
testcase_59 | -- | - |
testcase_60 | -- | - |
testcase_61 | -- | - |
testcase_62 | -- | - |
testcase_63 | -- | - |
testcase_64 | -- | - |
testcase_65 | -- | - |
testcase_66 | -- | - |
testcase_67 | -- | - |
testcase_68 | -- | - |
testcase_69 | -- | - |
testcase_70 | -- | - |
ソースコード
#include <bits/stdc++.h> using namespace std; #define FOR(i,m,n) for(int i=(m);i<(n);++i) #define REP(i,n) FOR(i,0,n) using ll = long long; constexpr int INF = 0x3f3f3f3f; constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL; constexpr double EPS = 1e-8; constexpr int MOD = 998244353; // constexpr int MOD = 1000000007; constexpr int DY4[]{1, 0, -1, 0}, DX4[]{0, -1, 0, 1}; constexpr int DY8[]{1, 1, 0, -1, -1, -1, 0, 1}; constexpr int DX8[]{0, -1, -1, -1, 0, 1, 1, 1}; template <typename T, typename U> inline bool chmax(T& a, U b) { return a < b ? (a = b, true) : false; } template <typename T, typename U> inline bool chmin(T& a, U b) { return a > b ? (a = b, true) : false; } struct IOSetup { IOSetup() { std::cin.tie(nullptr); std::ios_base::sync_with_stdio(false); std::cout << fixed << setprecision(20); } } iosetup; struct LowestCommonAncestorByDoubling { std::vector<int> depth; explicit LowestCommonAncestorByDoubling( const std::vector<std::vector<int>>& graph) : is_built(false), n(graph.size()), table_h(std::countr_zero(std::bit_floor(graph.size())) + 1), graph(graph) { depth.resize(n); parent.resize(table_h, std::vector<int>(n)); } void build(int root = 0) { is_built = true; dfs(-1, root, 0); for (int i = 0; i + 1 < table_h; ++i) { for (int ver = 0; ver < n; ++ver) { parent[i + 1][ver] = (parent[i][ver] == -1 ? -1 : parent[i][parent[i][ver]]); } } } int query(int u, int v) const { assert(is_built); if (depth[u] > depth[v]) std::swap(u, v); for (int i = 0; i < table_h; ++i) { if ((depth[v] - depth[u]) >> i & 1) v = parent[i][v]; } if (u == v) return u; for (int i = table_h - 1; i >= 0; --i) { if (parent[i][u] != parent[i][v]) { u = parent[i][u]; v = parent[i][v]; } } return parent.front()[u]; } int distance(const int u, const int v) const { assert(is_built); return depth[u] + depth[v] - depth[query(u, v)] * 2; } int level_ancestor(int v, const int d) const { assert(is_built); if (depth[v] < d) return -1; for (int i = depth[v] - d, bit = 0; i > 0; i >>= 1, ++bit) { if (i & 1) v = parent[bit][v]; } return v; } int jump(const int u, const int v, const int d) const { assert(is_built); if (d == 0) [[unlikely]] return u; const int l = query(u, v), d_lu = depth[u] - depth[l]; if (d_lu == d) return l; if (d_lu > d) return level_ancestor(u, depth[u] - d); return level_ancestor(v, depth[l] + (d - d_lu)); } private: bool is_built; const int n, table_h; const std::vector<std::vector<int>> graph; std::vector<std::vector<int>> parent; void dfs(const int par, const int ver, const int cur_depth) { depth[ver] = cur_depth; parent.front()[ver] = par; for (const int e : graph[ver]) { if (e != par) dfs(ver, e, cur_depth + 1); } } }; int main() { constexpr int S = 448; int n; cin >> n; vector<int> a(n); for (int& a_i : a) cin >> a_i; vector<vector<int>> graph(n); REP(_, n - 1) { int u, v; cin >> u >> v; --u; --v; graph[u].emplace_back(v); graph[v].emplace_back(u); } vector<int> order(n); iota(order.begin(), order.end(), 0); ranges::sort(order, greater<int>(), [&](const int i) -> int { return a[i]; }); LowestCommonAncestorByDoubling lca(graph); lca.build(); map<int, vector<int>> bad; vector<int> dp(n, 0), ans(n, 0), is_on(n, false); for (int i = 0; i < n;) { const int j = min(i + S, n); if (a[order[j - 1]] == a[order[j]]) bad[a[order[j]]].emplace_back(); FOR(r, i, j) ans[order[r]] = dp[order[r]]; FOR(r, i, j) FOR(l, i, r) chmax(ans[order[r]], lca.distance(order[l], order[r])); FOR(r, i, j) is_on[order[r]] = true; vector<int> dp2(n, -INF); const auto dfs1 = [&](auto dfs1, const int par, const int ver) -> void { if (is_on[ver]) dp2[ver] = 0; for (const int e : graph[ver]) { if (e != par) { dfs1(dfs1, ver, e); chmax(dp2[ver], dp2[e] + 1); } } }; dfs1(dfs1, -1, 0); const auto dfs2 = [&](auto dfs2, const int par, const int ver, const int pdp) -> void { dp[ver] = max(dp2[ver], pdp); const int c = graph[ver].size(); vector<int> left(c, -INF), right(c, -INF); FOR(i, 1, c) left[i] = max(left[i - 1], graph[ver][i - 1] == par ? pdp : dp2[graph[ver][i - 1]]); for (int i = c - 2; i >= 0; --i) { right[i] = max(right[i + 1], graph[ver][i + 1] == par ? pdp : dp2[graph[ver][i + 1]]); } REP(i, c) { if (graph[ver][i] != par) dfs2(dfs2, ver, graph[ver][i], max(left[i], right[i]) + 1); } }; dfs2(dfs2, -1, 0, -INF); i = j; } REP(i, n) { if (const auto it = bad.find(a[i]); it != bad.end()) it->second.emplace_back(i); } fill(is_on.begin(), is_on.end(), false); for (const vector<int>& vs : bad | views::values) { fill(dp.begin(), dp.end(), -INF); for (const int v : vs) is_on[v] = true; vector<int> dp2(n, -INF); const auto dfs1 = [&](auto dfs1, const int par, const int ver) -> void { if (is_on[ver]) dp2[ver] = 0; for (const int e : graph[ver]) { if (e != par) { dfs1(dfs1, ver, e); chmax(dp2[ver], dp2[e] + 1); } } }; dfs1(dfs1, -1, 0); const auto dfs2 = [&](auto dfs2, const int par, const int ver, const int pdp) -> void { dp[ver] = max(dp2[ver], pdp); const int c = graph[ver].size(); vector<int> left(c, -INF), right(c, -INF); FOR(i, 1, c) left[i] = max(left[i - 1], graph[ver][i - 1] == par ? pdp : dp2[graph[ver][i - 1]]); for (int i = c - 2; i >= 0; --i) { right[i] = max(right[i + 1], graph[ver][i + 1] == par ? pdp : dp2[graph[ver][i + 1]]); } REP(i, c) { if (graph[ver][i] != par) dfs2(dfs2, ver, graph[ver][i], max(left[i], right[i]) + 1); } }; dfs2(dfs2, -1, 0, -INF); for (const int v : vs) chmax(ans[v], dp[v]); for (const int v : vs) is_on[v] = false; } REP(i, n) cout << ans[i] << " \n"[i + 1 == n]; return 0; }