oj.uz

Submission #952441

# Submission time Handle Problem Language Result Execution time Memory
952441 2024-03-23T22:44:10 Z Error42 Power Plant (JOI20_power) C++17
100 / 100
 429 ms 26236 KB 
#include <algorithm>
#include <iostream>
#include <vector>

using namespace std;

int n;
vector<vector<int>> graph;
vector<bool> removed;
vector<int> subtree_sz;
vector<bool> generator;

void calc_subtree_sz(int const cur, int const par) {
    subtree_sz[cur] = 1;

    for (int const& neigh : graph[cur]) {
        if (neigh == par || removed[neigh])
            continue;

        calc_subtree_sz(neigh, cur);
        subtree_sz[cur] += subtree_sz[neigh];
    }
}

int find_centroid(int const cur, int const par, int const tree_sz) {
    for (int const& neigh : graph[cur]) {
        if (neigh == par || removed[neigh])
            continue;

        if (subtree_sz[neigh] > tree_sz / 2)
            return find_centroid(neigh, cur, tree_sz);
    }

    return cur;
}

int calc_ans_rec(int const cur, int const par) {
    int ans = -generator[cur];

    for (int const neigh : graph[cur]) {
        if (neigh == par || removed[neigh])
            continue;

        ans += calc_ans_rec(neigh, cur);
    }

    ans = max(ans, (int)generator[cur]);

    return ans;
}

int calc_ans(int const centroid) {
    int none = generator[centroid];
    int one = 0;
    int all = -generator[centroid];

    for (int const neigh : graph[centroid]) {
        if (removed[neigh])
            continue;

        int neigh_ans = calc_ans_rec(neigh, centroid);

        one = max(one, neigh_ans + generator[centroid]);
        all += neigh_ans;
    }

    return max({ none, one, all });
}

int decomp(int const cur) {
    calc_subtree_sz(cur, -1);
    int const centroid = find_centroid(cur, -1, subtree_sz[cur]);

    int ans = calc_ans(centroid);

    removed[centroid] = true;

    for (int const neigh : graph[centroid]) {
        if (removed[neigh])
            continue;

        ans = max(ans, decomp(neigh));
    }

    return ans;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    graph.resize(n);
    removed.resize(n);
    subtree_sz.resize(n);
    generator.resize(n);

    for (int i = 0; i < n - 1; i++) {
        int u, v;
        cin >> u >> v;
        u--; v--;

        graph[u].push_back(v);
        graph[v].push_back(u);
    }

    string s;
    cin >> s;

    for (int i = 0; i < n; i++)
        generator[i] = s[i] == '1';

    int const ans = decomp(0);

    cout << ans << "\n";
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 500 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 496 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 452 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 500 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 496 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 452 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 2 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 2 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 604 KB Output is correct
40 Correct 2 ms 604 KB Output is correct
41 Correct 2 ms 604 KB Output is correct
42 Correct 1 ms 604 KB Output is correct
43 Correct 1 ms 588 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 1 ms 608 KB Output is correct
46 Correct 2 ms 608 KB Output is correct
47 Correct 1 ms 604 KB Output is correct
48 Correct 1 ms 612 KB Output is correct
49 Correct 1 ms 604 KB Output is correct
50 Correct 1 ms 608 KB Output is correct
51 Correct 1 ms 600 KB Output is correct
52 Correct 1 ms 608 KB Output is correct
53 Correct 1 ms 600 KB Output is correct
54 Correct 1 ms 604 KB Output is correct
55 Correct 1 ms 604 KB Output is correct
56 Correct 1 ms 604 KB Output is correct
57 Correct 1 ms 604 KB Output is correct
58 Correct 1 ms 608 KB Output is correct
59 Correct 1 ms 608 KB Output is correct
60 Correct 1 ms 616 KB Output is correct
61 Correct 1 ms 608 KB Output is correct
62 Correct 1 ms 604 KB Output is correct
63 Correct 1 ms 348 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 500 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 496 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 452 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 2 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 2 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 604 KB Output is correct
40 Correct 2 ms 604 KB Output is correct
41 Correct 2 ms 604 KB Output is correct
42 Correct 1 ms 604 KB Output is correct
43 Correct 1 ms 588 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 1 ms 608 KB Output is correct
46 Correct 2 ms 608 KB Output is correct
47 Correct 1 ms 604 KB Output is correct
48 Correct 1 ms 612 KB Output is correct
49 Correct 1 ms 604 KB Output is correct
50 Correct 1 ms 608 KB Output is correct
51 Correct 1 ms 600 KB Output is correct
52 Correct 1 ms 608 KB Output is correct
53 Correct 1 ms 600 KB Output is correct
54 Correct 1 ms 604 KB Output is correct
55 Correct 1 ms 604 KB Output is correct
56 Correct 1 ms 604 KB Output is correct
57 Correct 1 ms 604 KB Output is correct
58 Correct 1 ms 608 KB Output is correct
59 Correct 1 ms 608 KB Output is correct
60 Correct 1 ms 616 KB Output is correct
61 Correct 1 ms 608 KB Output is correct
62 Correct 1 ms 604 KB Output is correct
63 Correct 1 ms 348 KB Output is correct
64 Correct 240 ms 15392 KB Output is correct
65 Correct 201 ms 15488 KB Output is correct
66 Correct 239 ms 15360 KB Output is correct
67 Correct 219 ms 15412 KB Output is correct
68 Correct 193 ms 15348 KB Output is correct
69 Correct 179 ms 15408 KB Output is correct
70 Correct 203 ms 15416 KB Output is correct
71 Correct 171 ms 15392 KB Output is correct
72 Correct 182 ms 15412 KB Output is correct
73 Correct 394 ms 25236 KB Output is correct
74 Correct 391 ms 25212 KB Output is correct
75 Correct 182 ms 15348 KB Output is correct
76 Correct 158 ms 15264 KB Output is correct
77 Correct 195 ms 15256 KB Output is correct
78 Correct 199 ms 15240 KB Output is correct
79 Correct 202 ms 15252 KB Output is correct
80 Correct 256 ms 15252 KB Output is correct
81 Correct 76 ms 15716 KB Output is correct
82 Correct 90 ms 15480 KB Output is correct
83 Correct 301 ms 19352 KB Output is correct
84 Correct 319 ms 21152 KB Output is correct
85 Correct 256 ms 20732 KB Output is correct
86 Correct 252 ms 16256 KB Output is correct
87 Correct 248 ms 16016 KB Output is correct
88 Correct 173 ms 16460 KB Output is correct
89 Correct 181 ms 16432 KB Output is correct
90 Correct 165 ms 16372 KB Output is correct
91 Correct 238 ms 16504 KB Output is correct
92 Correct 173 ms 16624 KB Output is correct
93 Correct 220 ms 20716 KB Output is correct
94 Correct 213 ms 22316 KB Output is correct
95 Correct 181 ms 19084 KB Output is correct
96 Correct 200 ms 17656 KB Output is correct
97 Correct 192 ms 16320 KB Output is correct
98 Correct 207 ms 15916 KB Output is correct
99 Correct 149 ms 15668 KB Output is correct
100 Correct 207 ms 18072 KB Output is correct
101 Correct 218 ms 16660 KB Output is correct
102 Correct 184 ms 15988 KB Output is correct
103 Correct 234 ms 15940 KB Output is correct
104 Correct 57 ms 16044 KB Output is correct
105 Correct 429 ms 22932 KB Output is correct
106 Correct 54 ms 16072 KB Output is correct
107 Correct 51 ms 15912 KB Output is correct
108 Correct 404 ms 26236 KB Output is correct
109 Correct 51 ms 16068 KB Output is correct
110 Correct 408 ms 26224 KB Output is correct
111 Correct 140 ms 15336 KB Output is correct