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Submission #677746

# Submission time Handle Problem Language Result Execution time Memory
677746 2023-01-04T09:35:58 Z bashkort Power Plant (JOI20_power) C++17
100 / 100
 186 ms 37188 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

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

    int n;
    cin >> n;

    vector<vector<int>> adj(n);

    for (int i = 1; i < n; ++i) {
        int a, b;
        cin >> a >> b;
        --a, --b;

        adj[a].push_back(b);
        adj[b].push_back(a);
    }

    string str;
    cin >> str;

    vector<bool> active(n);
    for (int i = 0; i < n; ++i) {
        active[i] = str[i] - '0';
    }

    if (active == vector(n, false)) {
        cout << 0 << '\n';
        return 0;
    }

    vector<int> dp(n);

    function<void(int, int)> dfs = [&](int v, int p) {
        for (int to : adj[v]) {
            if (to != p) {
                dfs(to, v);
                dp[v] += dp[to];
            }
        }
        dp[v] -= active[v];

        if (active[v]) {
            dp[v] = max(dp[v], 1);
        }

        dp[v] = max(dp[v], 0);
    };
    dfs(0, -1);

    int ans = 1;
    function<void(int, int, int)> gfs = [&](int v, int p, int up) {
        int sum = 0;
        for (int to : adj[v]) {
            if (to != p) {
                sum += dp[to];
            }
        }
        ans = max(ans, sum + up - active[v]);
        sum = sum + up - active[v];
        for (int to : adj[v]) {
            if (to != p) {
                int k = max(sum - dp[to], int(active[v]));
                ans = max(ans, dp[to] + k);
                gfs(to, v, k);
            }
        }
    };
    gfs(0, -1, 0);

    cout << ans << '\n';

    return 0;
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 320 KB Output is correct
16 Correct 0 ms 320 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 320 KB Output is correct
16 Correct 0 ms 320 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 428 KB Output is correct
29 Correct 1 ms 560 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 424 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 456 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 1 ms 456 KB Output is correct
42 Correct 1 ms 460 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 468 KB Output is correct
45 Correct 1 ms 468 KB Output is correct
46 Correct 1 ms 468 KB Output is correct
47 Correct 1 ms 468 KB Output is correct
48 Correct 1 ms 468 KB Output is correct
49 Correct 1 ms 468 KB Output is correct
50 Correct 1 ms 468 KB Output is correct
51 Correct 1 ms 468 KB Output is correct
52 Correct 1 ms 468 KB Output is correct
53 Correct 1 ms 468 KB Output is correct
54 Correct 1 ms 460 KB Output is correct
55 Correct 1 ms 468 KB Output is correct
56 Correct 1 ms 468 KB Output is correct
57 Correct 1 ms 596 KB Output is correct
58 Correct 1 ms 456 KB Output is correct
59 Correct 1 ms 468 KB Output is correct
60 Correct 1 ms 596 KB Output is correct
61 Correct 1 ms 468 KB Output is correct
62 Correct 1 ms 588 KB Output is correct
63 Correct 1 ms 340 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 320 KB Output is correct
16 Correct 0 ms 320 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 428 KB Output is correct
29 Correct 1 ms 560 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 424 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 456 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 1 ms 456 KB Output is correct
42 Correct 1 ms 460 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 468 KB Output is correct
45 Correct 1 ms 468 KB Output is correct
46 Correct 1 ms 468 KB Output is correct
47 Correct 1 ms 468 KB Output is correct
48 Correct 1 ms 468 KB Output is correct
49 Correct 1 ms 468 KB Output is correct
50 Correct 1 ms 468 KB Output is correct
51 Correct 1 ms 468 KB Output is correct
52 Correct 1 ms 468 KB Output is correct
53 Correct 1 ms 468 KB Output is correct
54 Correct 1 ms 460 KB Output is correct
55 Correct 1 ms 468 KB Output is correct
56 Correct 1 ms 468 KB Output is correct
57 Correct 1 ms 596 KB Output is correct
58 Correct 1 ms 456 KB Output is correct
59 Correct 1 ms 468 KB Output is correct
60 Correct 1 ms 596 KB Output is correct
61 Correct 1 ms 468 KB Output is correct
62 Correct 1 ms 588 KB Output is correct
63 Correct 1 ms 340 KB Output is correct
64 Correct 135 ms 15232 KB Output is correct
65 Correct 131 ms 15116 KB Output is correct
66 Correct 145 ms 15220 KB Output is correct
67 Correct 155 ms 15184 KB Output is correct
68 Correct 148 ms 15184 KB Output is correct
69 Correct 132 ms 15100 KB Output is correct
70 Correct 134 ms 15100 KB Output is correct
71 Correct 138 ms 15128 KB Output is correct
72 Correct 155 ms 15232 KB Output is correct
73 Correct 185 ms 35344 KB Output is correct
74 Correct 171 ms 35368 KB Output is correct
75 Correct 129 ms 14984 KB Output is correct
76 Correct 130 ms 15072 KB Output is correct
77 Correct 148 ms 15216 KB Output is correct
78 Correct 146 ms 15104 KB Output is correct
79 Correct 151 ms 14988 KB Output is correct
80 Correct 154 ms 15004 KB Output is correct
81 Correct 113 ms 15612 KB Output is correct
82 Correct 141 ms 15180 KB Output is correct
83 Correct 146 ms 23428 KB Output is correct
84 Correct 150 ms 26816 KB Output is correct
85 Correct 161 ms 26264 KB Output is correct
86 Correct 140 ms 17332 KB Output is correct
87 Correct 138 ms 16328 KB Output is correct
88 Correct 130 ms 16760 KB Output is correct
89 Correct 133 ms 16860 KB Output is correct
90 Correct 129 ms 16532 KB Output is correct
91 Correct 136 ms 16860 KB Output is correct
92 Correct 137 ms 17320 KB Output is correct
93 Correct 122 ms 21288 KB Output is correct
94 Correct 136 ms 24096 KB Output is correct
95 Correct 134 ms 21928 KB Output is correct
96 Correct 130 ms 19024 KB Output is correct
97 Correct 128 ms 16688 KB Output is correct
98 Correct 130 ms 15804 KB Output is correct
99 Correct 129 ms 15488 KB Output is correct
100 Correct 133 ms 20512 KB Output is correct
101 Correct 124 ms 17308 KB Output is correct
102 Correct 131 ms 16092 KB Output is correct
103 Correct 128 ms 15788 KB Output is correct
104 Correct 68 ms 16064 KB Output is correct
105 Correct 186 ms 30292 KB Output is correct
106 Correct 76 ms 15932 KB Output is correct
107 Correct 83 ms 15864 KB Output is correct
108 Correct 171 ms 36564 KB Output is correct
109 Correct 72 ms 16048 KB Output is correct
110 Correct 164 ms 37188 KB Output is correct
111 Correct 121 ms 15196 KB Output is correct