oj.uz

답안 #705464

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
705464 2023-03-04T12:47:36 Z pakhomovee Unique Cities (JOI19_ho_t5) C++17
100 / 100
 706 ms 82564 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <set>
#include <stdlib.h>
#include <map>
#include <random>
#include <cstring>
#include <functional>
#include <iomanip>
#include <cassert>
#include <queue>
#include <unordered_map>
#include <array>

using namespace std;

const int inf = 1e9;
vector<int> bfs(int v, vector<vector<int>> &g) {
    const int n = g.size();
    vector<int> dist(n, inf);
    dist[v] = 0;
    deque<int> q{v};
    while (!q.empty()) {
        int v = q.front();
        q.pop_front();
        for (int u : g[v]) {
            if (dist[u] > dist[v] + 1) {
                dist[u] = dist[v] + 1;
                q.push_back(u);
            }
        }
    }
    return dist;
}

const int maxn = 1 << 18;

int md[maxn];
int d[maxn];
void dfs(int v, vector<vector<int>> &g, int p) {
    md[v] = d[v];
    for (int u : g[v]) {
        if (u != p) {
            d[u] = d[v] + 1;
            dfs(u, g, v);
            md[v] = max(md[v], md[u]);
        }
    }
}
int ans[maxn];
vector<int> c;
int lst[maxn];

int f[maxn];
int get(int i) {
    int ans = 0;
    while (i >= 0) {
        ans += f[i];
        i = (i & (i + 1)) - 1;
    }
    return ans;
}

void upd(int i, int x) {
    while (i < maxn) {
        f[i] += x;
        i = i | (i + 1);
    }
}

struct node {
    int x, y, sz;
    node*l = nullptr;
    node*r = nullptr;
    node(int x): x(x) {
        y = rand();
        sz = 1;
    }
};

int s(node* v) {
    if (!v) return 0;
    return v->sz;
}

void upd(node* v) {
    if (!v) return;
    v->sz = 1 + s(v->l) + s(v->r);
}

node* merge(node*l, node*r) {
    if (!l) return r;
    if (!r) return l;
    if (l->y > r->y) {
        l->r = merge(l->r, r);
        upd(l);
        return l;
    }
    r->l = merge(l, r->l);
    upd(r);
    return r;
}

pair<node*, node*> split(node* v, int k) {
    if (!v) return { nullptr, nullptr };
    if (v->x <= k) {
        pair<node*, node*> q = split(v->r, k);
        v->r = q.first;
        upd(v);
        return { v, q.second };
    }
    pair<node*, node*> q = split(v->l, k);
    v->l = q.second;
    upd(v);
    return { q.first, v };
}

node* r = nullptr;

void add(int x) {
    node* t = new node(x);
    r = merge(r, t);
}

void cut(int x) {
    pair<node*, node*> q = split(r, x - 1);
    r = q.first;
}

void dfs1(int v, vector<vector<int>> &g, int p) {
    pair<int, int> mx = { -1, -1 };
    for (int u : g[v]) {
        if (u != p) {
            if (mx.first == -1) {
                mx.first = u;
            } else {
                if (md[mx.first] < md[u]) {
                    mx.second = mx.first;
                    mx.first = u;
                } else if (mx.second == -1 || md[mx.second] < md[u]) {
                    mx.second = u;
                }
            }
        }
    }
    int memlst = lst[c[v]];
    pair<node*, node*> q = { nullptr, nullptr };
    if (mx.second != -1) {
        upd(max(0, d[v] * 2 - md[mx.second]), 1);
        upd(d[v], -1);
        q = split(r, d[v] * 2 - md[mx.second] - 1);
        r = q.first;
        if (lst[c[v]] == -1 || get(lst[c[v]])) {
            add(d[v]);
            lst[c[v]] = d[v];
        }
        dfs1(mx.first, g, v);
        cut(d[v]);
        upd(max(0, d[v] * 2 - md[mx.second]), -1);
        upd(d[v], 1);
        r = merge(r, q.second);
    } else if (mx.first != -1) {
        if (lst[c[v]] == -1 || get(lst[c[v]])) {
            add(d[v]);
            lst[c[v]] = d[v];
        }
        dfs1(mx.first, g, v);
        cut(d[v]);
    }
    lst[c[v]] = memlst;
    if (mx.first != -1) {
        upd(max(0, d[v] * 2 - md[mx.first]), 1);
        upd(d[v], -1);
        q = split(r, d[v] * 2 - md[mx.first] - 1);
        r = q.first;
        ans[v] = s(r);
        if (lst[c[v]] == -1 || get(lst[c[v]])) {
            add(d[v]);
            lst[c[v]] = d[v];
        }
    } else {
        ans[v] = s(r);
    }
    for (int u : g[v]) {
        if (u != p) {
            if (u == mx.first) continue;
            dfs1(u, g, v);
        }
    }
    if (mx.first != -1) {
        upd(max(0, d[v] * 2 - md[mx.first]), -1);
        upd(d[v], 1);
        cut(d[v]);
        r = merge(r, q.second);
    }
    lst[c[v]] = memlst;
}

void solve() {
    int n, m;
    cin >> n >> m;
    vector<vector<int>> g(n);
    for (int i = 1; i < n; ++i) {
        int u, v;
        cin >> u >> v;
        --u; --v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    c.resize(n);
    for (int& i : c) {
        cin >> i;
    }
    vector<int> x = bfs(0, g);
    int i = max_element(x.begin(), x.end()) - x.begin();
    x = bfs(i, g);
    i = max_element(x.begin(), x.end()) - x.begin();
    x = bfs(i, g);
    int j = max_element(x.begin(), x.end()) - x.begin();
    vector<int> answ(n, 0);
    if (1) {
        d[i] = 0;
        dfs(i, g, i);
        fill(lst, lst + maxn, -1);
        fill(f, f + maxn, 0);
        dfs1(i, g, i);
        for (int i = 0; i < n; ++i) {
            answ[i] = max(answ[i], ans[i]);
        }
    }
    if (1) {
        d[j] = 0;
        dfs(j, g, j);
        fill(f, f + maxn, 0);
        dfs1(j, g, j);
        for (int i = 0; i < n; ++i) {
            answ[i] = max(answ[i], ans[i]);
        }
    }
    for (int i : answ) {
        cout << i << ' ';
    }
}

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t;
    t = 1;
    while (t--) {
        solve();
    }
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2388 KB Output is correct
2 Correct 4 ms 2652 KB Output is correct
3 Correct 3 ms 2624 KB Output is correct
4 Correct 4 ms 2772 KB Output is correct
5 Correct 4 ms 2772 KB Output is correct
6 Correct 4 ms 2772 KB Output is correct
7 Correct 4 ms 2772 KB Output is correct
8 Correct 4 ms 2644 KB Output is correct
9 Correct 4 ms 2776 KB Output is correct
10 Correct 3 ms 2624 KB Output is correct
11 Correct 4 ms 2652 KB Output is correct
12 Correct 2 ms 2516 KB Output is correct
13 Correct 3 ms 2772 KB Output is correct
14 Correct 3 ms 2644 KB Output is correct
15 Correct 3 ms 2644 KB Output is correct
16 Correct 2 ms 2524 KB Output is correct
17 Correct 3 ms 2772 KB Output is correct
18 Correct 3 ms 2772 KB Output is correct
19 Correct 3 ms 2772 KB Output is correct
20 Correct 4 ms 3036 KB Output is correct
21 Correct 4 ms 2900 KB Output is correct
22 Correct 3 ms 2772 KB Output is correct
23 Correct 4 ms 2760 KB Output is correct
24 Correct 4 ms 2772 KB Output is correct
25 Correct 4 ms 2780 KB Output is correct
26 Correct 3 ms 2644 KB Output is correct
27 Correct 4 ms 2900 KB Output is correct
28 Correct 4 ms 2900 KB Output is correct
29 Correct 4 ms 2908 KB Output is correct
30 Correct 2 ms 2516 KB Output is correct
31 Correct 4 ms 2772 KB Output is correct
32 Correct 5 ms 3028 KB Output is correct

Subtask #2
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 162 ms 18212 KB Output is correct
2 Correct 224 ms 31200 KB Output is correct
3 Correct 32 ms 8268 KB Output is correct
4 Correct 344 ms 27692 KB Output is correct
5 Correct 466 ms 52628 KB Output is correct
6 Correct 452 ms 44744 KB Output is correct
7 Correct 327 ms 26892 KB Output is correct
8 Correct 339 ms 29408 KB Output is correct
9 Correct 340 ms 30660 KB Output is correct
10 Correct 334 ms 27772 KB Output is correct
11 Correct 139 ms 23276 KB Output is correct
12 Correct 475 ms 41748 KB Output is correct
13 Correct 367 ms 37704 KB Output is correct
14 Correct 405 ms 38092 KB Output is correct
15 Correct 120 ms 22832 KB Output is correct
16 Correct 383 ms 42456 KB Output is correct
17 Correct 406 ms 41760 KB Output is correct

Subtask #3
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 294 ms 35672 KB Output is correct
2 Correct 681 ms 79104 KB Output is correct
3 Correct 52 ms 12560 KB Output is correct
4 Correct 380 ms 44528 KB Output is correct
5 Correct 706 ms 82564 KB Output is correct
6 Correct 586 ms 67160 KB Output is correct
7 Correct 365 ms 42868 KB Output is correct
8 Correct 437 ms 49488 KB Output is correct
9 Correct 409 ms 46904 KB Output is correct
10 Correct 387 ms 46196 KB Output is correct
11 Correct 271 ms 37028 KB Output is correct
12 Correct 620 ms 71532 KB Output is correct
13 Correct 459 ms 53980 KB Output is correct
14 Correct 508 ms 58280 KB Output is correct
15 Correct 125 ms 23848 KB Output is correct
16 Correct 524 ms 62708 KB Output is correct
17 Correct 535 ms 61824 KB Output is correct

Subtask #4
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2388 KB Output is correct
2 Correct 4 ms 2652 KB Output is correct
3 Correct 3 ms 2624 KB Output is correct
4 Correct 4 ms 2772 KB Output is correct
5 Correct 4 ms 2772 KB Output is correct
6 Correct 4 ms 2772 KB Output is correct
7 Correct 4 ms 2772 KB Output is correct
8 Correct 4 ms 2644 KB Output is correct
9 Correct 4 ms 2776 KB Output is correct
10 Correct 3 ms 2624 KB Output is correct
11 Correct 4 ms 2652 KB Output is correct
12 Correct 2 ms 2516 KB Output is correct
13 Correct 3 ms 2772 KB Output is correct
14 Correct 3 ms 2644 KB Output is correct
15 Correct 3 ms 2644 KB Output is correct
16 Correct 2 ms 2524 KB Output is correct
17 Correct 3 ms 2772 KB Output is correct
18 Correct 3 ms 2772 KB Output is correct
19 Correct 3 ms 2772 KB Output is correct
20 Correct 4 ms 3036 KB Output is correct
21 Correct 4 ms 2900 KB Output is correct
22 Correct 3 ms 2772 KB Output is correct
23 Correct 4 ms 2760 KB Output is correct
24 Correct 4 ms 2772 KB Output is correct
25 Correct 4 ms 2780 KB Output is correct
26 Correct 3 ms 2644 KB Output is correct
27 Correct 4 ms 2900 KB Output is correct
28 Correct 4 ms 2900 KB Output is correct
29 Correct 4 ms 2908 KB Output is correct
30 Correct 2 ms 2516 KB Output is correct
31 Correct 4 ms 2772 KB Output is correct
32 Correct 5 ms 3028 KB Output is correct
33 Correct 162 ms 18212 KB Output is correct
34 Correct 224 ms 31200 KB Output is correct
35 Correct 32 ms 8268 KB Output is correct
36 Correct 344 ms 27692 KB Output is correct
37 Correct 466 ms 52628 KB Output is correct
38 Correct 452 ms 44744 KB Output is correct
39 Correct 327 ms 26892 KB Output is correct
40 Correct 339 ms 29408 KB Output is correct
41 Correct 340 ms 30660 KB Output is correct
42 Correct 334 ms 27772 KB Output is correct
43 Correct 139 ms 23276 KB Output is correct
44 Correct 475 ms 41748 KB Output is correct
45 Correct 367 ms 37704 KB Output is correct
46 Correct 405 ms 38092 KB Output is correct
47 Correct 120 ms 22832 KB Output is correct
48 Correct 383 ms 42456 KB Output is correct
49 Correct 406 ms 41760 KB Output is correct
50 Correct 294 ms 35672 KB Output is correct
51 Correct 681 ms 79104 KB Output is correct
52 Correct 52 ms 12560 KB Output is correct
53 Correct 380 ms 44528 KB Output is correct
54 Correct 706 ms 82564 KB Output is correct
55 Correct 586 ms 67160 KB Output is correct
56 Correct 365 ms 42868 KB Output is correct
57 Correct 437 ms 49488 KB Output is correct
58 Correct 409 ms 46904 KB Output is correct
59 Correct 387 ms 46196 KB Output is correct
60 Correct 271 ms 37028 KB Output is correct
61 Correct 620 ms 71532 KB Output is correct
62 Correct 459 ms 53980 KB Output is correct
63 Correct 508 ms 58280 KB Output is correct
64 Correct 125 ms 23848 KB Output is correct
65 Correct 524 ms 62708 KB Output is correct
66 Correct 535 ms 61824 KB Output is correct
67 Correct 32 ms 7972 KB Output is correct
68 Correct 198 ms 28868 KB Output is correct
69 Correct 289 ms 36608 KB Output is correct
70 Correct 382 ms 40384 KB Output is correct
71 Correct 498 ms 52620 KB Output is correct
72 Correct 500 ms 46760 KB Output is correct
73 Correct 352 ms 39472 KB Output is correct
74 Correct 376 ms 32908 KB Output is correct
75 Correct 347 ms 34728 KB Output is correct
76 Correct 353 ms 36740 KB Output is correct
77 Correct 235 ms 32812 KB Output is correct
78 Correct 451 ms 45024 KB Output is correct
79 Correct 367 ms 41456 KB Output is correct
80 Correct 379 ms 39716 KB Output is correct
81 Correct 113 ms 22572 KB Output is correct
82 Correct 360 ms 42392 KB Output is correct
83 Correct 406 ms 41744 KB Output is correct
84 Correct 376 ms 43844 KB Output is correct
85 Correct 489 ms 53256 KB Output is correct
86 Correct 480 ms 47840 KB Output is correct
87 Correct 360 ms 42536 KB Output is correct
88 Correct 390 ms 36460 KB Output is correct
89 Correct 385 ms 42080 KB Output is correct
90 Correct 369 ms 42052 KB Output is correct
91 Correct 236 ms 34956 KB Output is correct
92 Correct 502 ms 52432 KB Output is correct
93 Correct 400 ms 39620 KB Output is correct
94 Correct 392 ms 39008 KB Output is correct
95 Correct 119 ms 23148 KB Output is correct
96 Correct 384 ms 43076 KB Output is correct
97 Correct 447 ms 42532 KB Output is correct
98 Correct 384 ms 44716 KB Output is correct
99 Correct 530 ms 54312 KB Output is correct
100 Correct 590 ms 64184 KB Output is correct
101 Correct 349 ms 42152 KB Output is correct
102 Correct 423 ms 47788 KB Output is correct
103 Correct 400 ms 46028 KB Output is correct
104 Correct 406 ms 45828 KB Output is correct
105 Correct 253 ms 33984 KB Output is correct
106 Correct 560 ms 55860 KB Output is correct
107 Correct 434 ms 44608 KB Output is correct
108 Correct 476 ms 51636 KB Output is correct
109 Correct 122 ms 23812 KB Output is correct
110 Correct 447 ms 47716 KB Output is correct
111 Correct 539 ms 57356 KB Output is correct