結果

問題 No.2634 Tree Distance 3
ユーザー Yu_212Yu_212
提出日時 2024-02-18 14:09:28
言語 C++23
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 2,468 ms / 3,000 ms
コード長 4,168 bytes
コンパイル時間 4,885 ms
コンパイル使用メモリ 265,712 KB
実行使用メモリ 334,972 KB
最終ジャッジ日時 2024-02-18 14:11:33
合計ジャッジ時間 109,543 ms
ジャッジサーバーID
(参考情報)
judge16 / judge15
このコードへのチャレンジ
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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 1,846 ms
316,572 KB
testcase_01 AC 1,835 ms
316,572 KB
testcase_02 AC 1,877 ms
316,572 KB
testcase_03 AC 1,825 ms
316,572 KB
testcase_04 AC 1,895 ms
316,572 KB
testcase_05 AC 1,829 ms
316,572 KB
testcase_06 AC 1,870 ms
316,572 KB
testcase_07 AC 1,796 ms
316,572 KB
testcase_08 AC 1,579 ms
304,784 KB
testcase_09 AC 1,586 ms
305,176 KB
testcase_10 AC 1,524 ms
305,120 KB
testcase_11 AC 1,950 ms
304,220 KB
testcase_12 AC 1,941 ms
303,568 KB
testcase_13 AC 1,583 ms
305,452 KB
testcase_14 AC 1,916 ms
303,796 KB
testcase_15 AC 1,542 ms
305,132 KB
testcase_16 AC 1,560 ms
257,192 KB
testcase_17 AC 827 ms
152,352 KB
testcase_18 AC 1,144 ms
192,896 KB
testcase_19 AC 1,315 ms
225,252 KB
testcase_20 AC 380 ms
73,344 KB
testcase_21 AC 2,017 ms
320,792 KB
testcase_22 AC 2,029 ms
320,792 KB
testcase_23 AC 2,102 ms
320,792 KB
testcase_24 AC 2,075 ms
312,504 KB
testcase_25 AC 2,079 ms
311,416 KB
testcase_26 AC 2,095 ms
322,804 KB
testcase_27 AC 2,028 ms
312,500 KB
testcase_28 AC 2,033 ms
312,500 KB
testcase_29 AC 2,047 ms
320,296 KB
testcase_30 AC 1,977 ms
326,004 KB
testcase_31 AC 1,990 ms
325,856 KB
testcase_32 AC 1,971 ms
325,812 KB
testcase_33 AC 1,265 ms
224,380 KB
testcase_34 AC 221 ms
47,104 KB
testcase_35 AC 723 ms
132,736 KB
testcase_36 AC 354 ms
75,392 KB
testcase_37 AC 903 ms
159,412 KB
testcase_38 AC 8 ms
6,676 KB
testcase_39 AC 9 ms
6,676 KB
testcase_40 AC 6 ms
6,676 KB
testcase_41 AC 6 ms
6,676 KB
testcase_42 AC 6 ms
6,676 KB
testcase_43 AC 510 ms
100,224 KB
testcase_44 AC 344 ms
68,224 KB
testcase_45 AC 1,606 ms
274,748 KB
testcase_46 AC 1,031 ms
179,120 KB
testcase_47 AC 1,873 ms
307,776 KB
testcase_48 AC 2,018 ms
325,804 KB
testcase_49 AC 1,986 ms
325,812 KB
testcase_50 AC 2,028 ms
325,784 KB
testcase_51 AC 2,468 ms
325,920 KB
testcase_52 AC 2,360 ms
325,864 KB
testcase_53 AC 6 ms
6,676 KB
testcase_54 AC 7 ms
6,676 KB
testcase_55 AC 6 ms
6,676 KB
testcase_56 AC 6 ms
6,676 KB
testcase_57 AC 6 ms
6,676 KB
testcase_58 AC 2 ms
6,676 KB
testcase_59 AC 2 ms
6,676 KB
testcase_60 AC 1,827 ms
334,740 KB
testcase_61 AC 1,839 ms
334,972 KB
testcase_62 AC 1,850 ms
325,492 KB
testcase_63 AC 1,653 ms
291,200 KB
testcase_64 AC 992 ms
187,848 KB
testcase_65 AC 1,555 ms
273,972 KB
testcase_66 AC 345 ms
80,128 KB
testcase_67 AC 279 ms
66,944 KB
testcase_68 AC 1,750 ms
300,580 KB
testcase_69 AC 1,679 ms
300,580 KB
testcase_70 AC 1,716 ms
300,580 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using i64 = long long;
#define var auto


using graph = vector<vector<int>>;
template <class F>
void one_third_centroid_decomposition(const graph &g, F f) {
    const int n = g.size();
    assert(n >= 1);
    vector<int> size(n), xy(n), count(n), sort(n);
    using buf_node = pair<graph, graph>;
    vector<unique_ptr<buf_node>> buf;
    const auto get_buf = [&](const int depth) -> buf_node & {
        while (depth >= buf.size())
            buf.push_back(make_unique<buf_node>(graph(n), graph(n)));
        return *buf[depth];
    };
    const auto dc = [&](const auto &dc, const int n, const int v, const graph &g, const int depth) -> void {
        if (n <= 2)
            return;
        int s = -1;
        const auto sz = [&](const auto &sz, const int v, const int p) -> void {
            size[v] = 1;
            int mx = 0;
            for (int e : g[v]) {
                if (e != p) {
                    sz(sz, e, v);
                    size[v] += size[e];
                    mx = max(mx, size[e]);
                }
            }
            mx = max(mx, n - size[v]);
            if (mx * 2 <= n)
                s = v;
        };
        sz(sz, v, -1);
        int maxsz = 0;
        for (int e : g[s]) {
            if (size[e] > size[s])
                size[e] = n - size[s];
            count[size[e]]++;
            maxsz = max(maxsz, size[e] + 1);
        }
        for (int i = 1; i < maxsz; i++)
            count[i] += count[i - 1];
        for (int e : g[s])
            sort[--count[size[e]]] = e;
        fill(count.begin(), count.begin() + maxsz, 0);
        int xs = 0, ys = 0;
        for (int i = g[s].size(); i-- > 0;) {
            if (xs < ys)
                xy[sort[i]] = 0, xs += size[sort[i]];
            else
                xy[sort[i]] = 1, ys += size[sort[i]];
        }
        auto &[x, y] = get_buf(depth);
        x[s].clear();
        y[s].clear();
        const auto build = [&](const auto &build, const int v, const int p, auto &t) -> void {
            t[v] = g[v];
            for (int e : g[v]) {
                if (e != p) build(build, e, v, t);
            }
        };
        for (int e : g[s]) {
            auto &t = xy[e] ? y : x;
            t[s].push_back(e);
            build(build, e, s, t);
        }
        f(s, x, y);
        dc(dc, xs + 1, s, x, depth + 1);
        dc(dc, ys + 1, s, y, depth + 1);
    };
    dc(dc, n, 0, g, 0);
}

int main() {
    cin.tie(0)->sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    vector<vector<int>> edges(n);
    for (int i = 0; i < n - 1; i ++) {
        int u, v;
        cin >> u >> v;
        u--, v--;
        edges[u].push_back(v);
        edges[v].push_back(u);
    }
    vector<int> ans(n);
    const auto f = [&](const int s, const auto &x, const auto &y) {
        vector<int> table;
        auto dfs1 = [&](auto self, int node, int parent, int depth) -> void {
            while (table.size() <= depth) table.push_back(0);
            table[depth] = min(table[depth], -a[node]);
            for (int child : x[node]) {
                if (child == parent) continue;
                self(self, child, node, depth + 1);
            }
        };
        dfs1(dfs1, s, s, 0);
        int m = table.size();
        for (int i = m - 2; i >= 0; i--) {
            table[i] = min(table[i], table[i + 1]);
        }
        auto dfs2 = [&](auto self, int node, int parent, int depth) -> void {
            int pos = upper_bound(table.begin(), table.end(), -a[node]) - table.begin();
            if (pos >= 1) {
                ans[node] = max(ans[node], depth + pos - 1);
            }
            for (int child : y[node]) {
                if (child == parent) continue;
                self(self, child, node, depth + 1);
            }
        };
        dfs2(dfs2, s, s, 0);
    };
    one_third_centroid_decomposition(edges, [&](int s, const auto &x, const auto &y) {
        f(s, x, y);
        f(s, y, x);
    });
    for (int i = 0; i < n; i++) {
        cout << ans[i] << " \n"[i+1==n];
    }
}
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