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Submission #306759

# Submission time Handle Problem Language Result Execution time Memory
306759 2020-09-26T08:50:04 Z MrDomino Power Plant (JOI20_power) C++14
47 / 100
 1500 ms 25912 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = (int) 2e5 + 7;
int n;
vector<int> g[N];
int v[N];
int dp[N];
int sol;

void dfs(int a, int p)
{
    for (auto &b : g[a])
    {
        if (b != p)
        {
            dfs(b, a);
        }
    }
    dp[a] = -v[a];
    for (auto &b : g[a])
    {
        if (b != p)
        {
            dp[a] += dp[b];
        }
    }
    dp[a] = max(dp[a], v[a]);
}

void reroot(int a, int p)
{
    dp[a] = -v[a];
    for (auto &b : g[a])
    {
        if (b != p)
        {
            dp[a] += dp[b];
        }
    }
    dp[a] = max(dp[a], v[a]);
    dp[p] = -v[p];
    for (auto &b : g[p])
    {
        dp[p] += dp[b];
    }
    dp[p] = max(dp[p], v[p]);
}

void dfs_solve(int a, int p)
{
    sol = max(sol, dp[a]);
    for (auto &b : g[a])
    {
        if (b != p)
        {
            reroot(a, b);
            dfs_solve(b, a);
            reroot(b, a);
        }
    }
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n;
    for (int i = 1; i < n; i++)
    {
        int x, y;
        cin >> x >> y;
        g[x].push_back(y);
        g[y].push_back(x);
    }
    string s;
    cin >> s;
    for (int i = 1; i <= n; i++)
    {
        if (s[i - 1] == '1')
        {
            v[i] = 1;
            sol++;
        }
    }
    sol = min(sol, 2);
    dfs(1, -1);
    dfs_solve(1, -1);
    cout << sol << "\n";
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 5 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 5 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 5024 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 5 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 5 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 5024 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 5 ms 5152 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 4 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 4 ms 5120 KB Output is correct
27 Correct 5 ms 5120 KB Output is correct
28 Correct 6 ms 5120 KB Output is correct
29 Correct 5 ms 5248 KB Output is correct
30 Correct 5 ms 5248 KB Output is correct
31 Correct 4 ms 5120 KB Output is correct
32 Correct 4 ms 5120 KB Output is correct
33 Correct 5 ms 5120 KB Output is correct
34 Correct 4 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 4 ms 5120 KB Output is correct
37 Correct 6 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 5 ms 5120 KB Output is correct
40 Correct 5 ms 5120 KB Output is correct
41 Correct 5 ms 5248 KB Output is correct
42 Correct 5 ms 5120 KB Output is correct
43 Correct 4 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 5 ms 5120 KB Output is correct
46 Correct 4 ms 5120 KB Output is correct
47 Correct 5 ms 5120 KB Output is correct
48 Correct 6 ms 5248 KB Output is correct
49 Correct 5 ms 5248 KB Output is correct
50 Correct 5 ms 5120 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 4 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5248 KB Output is correct
55 Correct 4 ms 5120 KB Output is correct
56 Correct 13 ms 5120 KB Output is correct
57 Correct 5 ms 5248 KB Output is correct
58 Correct 12 ms 5120 KB Output is correct
59 Correct 16 ms 5120 KB Output is correct
60 Correct 5 ms 5120 KB Output is correct
61 Correct 13 ms 5120 KB Output is correct
62 Correct 5 ms 5248 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct

Subtask #3
0.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 5 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 5 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 5024 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 5 ms 5152 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 4 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 4 ms 5120 KB Output is correct
27 Correct 5 ms 5120 KB Output is correct
28 Correct 6 ms 5120 KB Output is correct
29 Correct 5 ms 5248 KB Output is correct
30 Correct 5 ms 5248 KB Output is correct
31 Correct 4 ms 5120 KB Output is correct
32 Correct 4 ms 5120 KB Output is correct
33 Correct 5 ms 5120 KB Output is correct
34 Correct 4 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 4 ms 5120 KB Output is correct
37 Correct 6 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 5 ms 5120 KB Output is correct
40 Correct 5 ms 5120 KB Output is correct
41 Correct 5 ms 5248 KB Output is correct
42 Correct 5 ms 5120 KB Output is correct
43 Correct 4 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 5 ms 5120 KB Output is correct
46 Correct 4 ms 5120 KB Output is correct
47 Correct 5 ms 5120 KB Output is correct
48 Correct 6 ms 5248 KB Output is correct
49 Correct 5 ms 5248 KB Output is correct
50 Correct 5 ms 5120 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 4 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5248 KB Output is correct
55 Correct 4 ms 5120 KB Output is correct
56 Correct 13 ms 5120 KB Output is correct
57 Correct 5 ms 5248 KB Output is correct
58 Correct 12 ms 5120 KB Output is correct
59 Correct 16 ms 5120 KB Output is correct
60 Correct 5 ms 5120 KB Output is correct
61 Correct 13 ms 5120 KB Output is correct
62 Correct 5 ms 5248 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct
64 Correct 234 ms 13280 KB Output is correct
65 Correct 224 ms 13368 KB Output is correct
66 Correct 218 ms 13348 KB Output is correct
67 Correct 224 ms 13352 KB Output is correct
68 Correct 230 ms 13348 KB Output is correct
69 Correct 233 ms 13364 KB Output is correct
70 Correct 213 ms 13252 KB Output is correct
71 Correct 215 ms 13252 KB Output is correct
72 Correct 211 ms 12468 KB Output is correct
73 Correct 284 ms 25912 KB Output is correct
74 Correct 264 ms 25788 KB Output is correct
75 Correct 217 ms 13240 KB Output is correct
76 Correct 213 ms 13120 KB Output is correct
77 Correct 220 ms 13108 KB Output is correct
78 Correct 226 ms 13236 KB Output is correct
79 Correct 215 ms 13120 KB Output is correct
80 Correct 235 ms 13244 KB Output is correct
81 Execution timed out 1583 ms 13812 KB Time limit exceeded
82 Halted 0 ms 0 KB -