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Submission #493642

# Submission time Handle Problem Language Result Execution time Memory
493642 2021-12-12T12:52:21 Z 600Mihnea Power Plant (JOI20_power) C++17
47 / 100
 1500 ms 25792 KB 
#include <bits/stdc++.h>

using namespace std;

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

void compute(int a, int p) {
  dp[a] = 0;
  for (auto &b : g[a]) {
    if (b != p) {
      dp[a] += max(dp[b], is[b]);
    }
  }
  dp[a] -= is[a];
}

void dfs(int a, int p = 0) {
  for (auto &b : g[a]) {
    if (b != p) {
      dfs(b, a);
    }
  }
  compute(a, p);
}

void rer(int p, int a) {
  dp[a] -= max(dp[p], is[p]);
  compute(p, 0);
}

void solve(int a, int p = 0) {
  sol = max(sol, dp[a]);
  for (auto &b : g[a]) {
    if (b != p) {
      rer(b, a);
      solve(b, a);
      rer(a, b);
    }
  }
}

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

  ///freopen ("input.txt", "r", stdin);

  cin >> n;
  for (int i = 1; i < n; i++) {
    int a, b;
    cin >> a >> b;
    g[a].push_back(b);
    g[b].push_back(a);
  }
  cin >> s;
  int cnt = 0;
  for (int i = 1; i <= n; i++) {
    is[i] = s[i - 1] - '0';
    cnt += is[i];
  }
  sol = min(cnt, 2);
  dfs(1);
  solve(1);
  cout << sol << "\n";

  return 0;
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 5024 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 2 ms 4952 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 2 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 2 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 4 ms 4940 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 5024 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 2 ms 4952 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 2 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 2 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 4 ms 4940 KB Output is correct
22 Correct 4 ms 5068 KB Output is correct
23 Correct 5 ms 5068 KB Output is correct
24 Correct 4 ms 5068 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 4 ms 5068 KB Output is correct
27 Correct 3 ms 5068 KB Output is correct
28 Correct 5 ms 5068 KB Output is correct
29 Correct 3 ms 5196 KB Output is correct
30 Correct 3 ms 5068 KB Output is correct
31 Correct 3 ms 5068 KB Output is correct
32 Correct 3 ms 5032 KB Output is correct
33 Correct 3 ms 5068 KB Output is correct
34 Correct 3 ms 5068 KB Output is correct
35 Correct 3 ms 5068 KB Output is correct
36 Correct 3 ms 5068 KB Output is correct
37 Correct 5 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 5 ms 5104 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 4 ms 5040 KB Output is correct
42 Correct 3 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 3 ms 5068 KB Output is correct
45 Correct 3 ms 5068 KB Output is correct
46 Correct 3 ms 5068 KB Output is correct
47 Correct 3 ms 5068 KB Output is correct
48 Correct 5 ms 5068 KB Output is correct
49 Correct 4 ms 5068 KB Output is correct
50 Correct 5 ms 5068 KB Output is correct
51 Correct 4 ms 5068 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 4 ms 5068 KB Output is correct
54 Correct 3 ms 5068 KB Output is correct
55 Correct 3 ms 5068 KB Output is correct
56 Correct 7 ms 5068 KB Output is correct
57 Correct 3 ms 5196 KB Output is correct
58 Correct 8 ms 5068 KB Output is correct
59 Correct 8 ms 5068 KB Output is correct
60 Correct 4 ms 5068 KB Output is correct
61 Correct 11 ms 5068 KB Output is correct
62 Correct 3 ms 5196 KB Output is correct
63 Correct 3 ms 5068 KB Output is correct

Subtask #3
0.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 5024 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 2 ms 4952 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 2 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 2 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 4 ms 4940 KB Output is correct
22 Correct 4 ms 5068 KB Output is correct
23 Correct 5 ms 5068 KB Output is correct
24 Correct 4 ms 5068 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 4 ms 5068 KB Output is correct
27 Correct 3 ms 5068 KB Output is correct
28 Correct 5 ms 5068 KB Output is correct
29 Correct 3 ms 5196 KB Output is correct
30 Correct 3 ms 5068 KB Output is correct
31 Correct 3 ms 5068 KB Output is correct
32 Correct 3 ms 5032 KB Output is correct
33 Correct 3 ms 5068 KB Output is correct
34 Correct 3 ms 5068 KB Output is correct
35 Correct 3 ms 5068 KB Output is correct
36 Correct 3 ms 5068 KB Output is correct
37 Correct 5 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 5 ms 5104 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 4 ms 5040 KB Output is correct
42 Correct 3 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 3 ms 5068 KB Output is correct
45 Correct 3 ms 5068 KB Output is correct
46 Correct 3 ms 5068 KB Output is correct
47 Correct 3 ms 5068 KB Output is correct
48 Correct 5 ms 5068 KB Output is correct
49 Correct 4 ms 5068 KB Output is correct
50 Correct 5 ms 5068 KB Output is correct
51 Correct 4 ms 5068 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 4 ms 5068 KB Output is correct
54 Correct 3 ms 5068 KB Output is correct
55 Correct 3 ms 5068 KB Output is correct
56 Correct 7 ms 5068 KB Output is correct
57 Correct 3 ms 5196 KB Output is correct
58 Correct 8 ms 5068 KB Output is correct
59 Correct 8 ms 5068 KB Output is correct
60 Correct 4 ms 5068 KB Output is correct
61 Correct 11 ms 5068 KB Output is correct
62 Correct 3 ms 5196 KB Output is correct
63 Correct 3 ms 5068 KB Output is correct
64 Correct 199 ms 13228 KB Output is correct
65 Correct 170 ms 13256 KB Output is correct
66 Correct 192 ms 13272 KB Output is correct
67 Correct 149 ms 13152 KB Output is correct
68 Correct 191 ms 13228 KB Output is correct
69 Correct 205 ms 13304 KB Output is correct
70 Correct 147 ms 13188 KB Output is correct
71 Correct 163 ms 13192 KB Output is correct
72 Correct 183 ms 13260 KB Output is correct
73 Correct 226 ms 25792 KB Output is correct
74 Correct 225 ms 25784 KB Output is correct
75 Correct 164 ms 13036 KB Output is correct
76 Correct 155 ms 13080 KB Output is correct
77 Correct 170 ms 13092 KB Output is correct
78 Correct 150 ms 13128 KB Output is correct
79 Correct 144 ms 13124 KB Output is correct
80 Correct 162 ms 13104 KB Output is correct
81 Execution timed out 1584 ms 13556 KB Time limit exceeded
82 Halted 0 ms 0 KB -