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Submission #493640

# Submission time Handle Problem Language Result Execution time Memory
493640 2021-12-12T12:46:44 Z 600Mihnea Power Plant (JOI20_power) C++17
47 / 100
 1500 ms 13192 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = (int) 2e5 + 7;
int n;
int sol;
int dp[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] += dp[b];
    }
  }
  dp[a] -= is[a];
  dp[a] = max(dp[a], is[a]);
}

void dfs(int a, int p = -1) {
  for (auto &b : g[a]) {
    if (b != p) {
      dfs(b, a);
    }
  }
  compute(a, p);
}
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);
  for (int i = 1; i <= n; i++) {
    dfs(i);
    sol = max(sol, dp[i]);
  }
  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 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 2 ms 4940 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 3 ms 4956 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4964 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 2 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 2 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 2 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 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 2 ms 4940 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 3 ms 4956 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4964 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 2 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 2 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 2 ms 4940 KB Output is correct
22 Correct 128 ms 5068 KB Output is correct
23 Correct 125 ms 5080 KB Output is correct
24 Correct 132 ms 5080 KB Output is correct
25 Correct 129 ms 5068 KB Output is correct
26 Correct 126 ms 5080 KB Output is correct
27 Correct 131 ms 5084 KB Output is correct
28 Correct 128 ms 5084 KB Output is correct
29 Correct 96 ms 5068 KB Output is correct
30 Correct 104 ms 5136 KB Output is correct
31 Correct 77 ms 5068 KB Output is correct
32 Correct 82 ms 5068 KB Output is correct
33 Correct 95 ms 5088 KB Output is correct
34 Correct 94 ms 5068 KB Output is correct
35 Correct 97 ms 5084 KB Output is correct
36 Correct 104 ms 5092 KB Output is correct
37 Correct 81 ms 5092 KB Output is correct
38 Correct 103 ms 5088 KB Output is correct
39 Correct 130 ms 5104 KB Output is correct
40 Correct 130 ms 5188 KB Output is correct
41 Correct 130 ms 5100 KB Output is correct
42 Correct 131 ms 5088 KB Output is correct
43 Correct 130 ms 5096 KB Output is correct
44 Correct 80 ms 5068 KB Output is correct
45 Correct 80 ms 5068 KB Output is correct
46 Correct 79 ms 5092 KB Output is correct
47 Correct 84 ms 5188 KB Output is correct
48 Correct 68 ms 5112 KB Output is correct
49 Correct 71 ms 5068 KB Output is correct
50 Correct 71 ms 5068 KB Output is correct
51 Correct 77 ms 5096 KB Output is correct
52 Correct 94 ms 5088 KB Output is correct
53 Correct 86 ms 5108 KB Output is correct
54 Correct 81 ms 5100 KB Output is correct
55 Correct 103 ms 5088 KB Output is correct
56 Correct 56 ms 5096 KB Output is correct
57 Correct 99 ms 5140 KB Output is correct
58 Correct 50 ms 5068 KB Output is correct
59 Correct 54 ms 5068 KB Output is correct
60 Correct 94 ms 5124 KB Output is correct
61 Correct 50 ms 5068 KB Output is correct
62 Correct 101 ms 5188 KB Output is correct
63 Correct 72 ms 5020 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 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 2 ms 4940 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 3 ms 4956 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4964 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 2 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 2 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 2 ms 4940 KB Output is correct
22 Correct 128 ms 5068 KB Output is correct
23 Correct 125 ms 5080 KB Output is correct
24 Correct 132 ms 5080 KB Output is correct
25 Correct 129 ms 5068 KB Output is correct
26 Correct 126 ms 5080 KB Output is correct
27 Correct 131 ms 5084 KB Output is correct
28 Correct 128 ms 5084 KB Output is correct
29 Correct 96 ms 5068 KB Output is correct
30 Correct 104 ms 5136 KB Output is correct
31 Correct 77 ms 5068 KB Output is correct
32 Correct 82 ms 5068 KB Output is correct
33 Correct 95 ms 5088 KB Output is correct
34 Correct 94 ms 5068 KB Output is correct
35 Correct 97 ms 5084 KB Output is correct
36 Correct 104 ms 5092 KB Output is correct
37 Correct 81 ms 5092 KB Output is correct
38 Correct 103 ms 5088 KB Output is correct
39 Correct 130 ms 5104 KB Output is correct
40 Correct 130 ms 5188 KB Output is correct
41 Correct 130 ms 5100 KB Output is correct
42 Correct 131 ms 5088 KB Output is correct
43 Correct 130 ms 5096 KB Output is correct
44 Correct 80 ms 5068 KB Output is correct
45 Correct 80 ms 5068 KB Output is correct
46 Correct 79 ms 5092 KB Output is correct
47 Correct 84 ms 5188 KB Output is correct
48 Correct 68 ms 5112 KB Output is correct
49 Correct 71 ms 5068 KB Output is correct
50 Correct 71 ms 5068 KB Output is correct
51 Correct 77 ms 5096 KB Output is correct
52 Correct 94 ms 5088 KB Output is correct
53 Correct 86 ms 5108 KB Output is correct
54 Correct 81 ms 5100 KB Output is correct
55 Correct 103 ms 5088 KB Output is correct
56 Correct 56 ms 5096 KB Output is correct
57 Correct 99 ms 5140 KB Output is correct
58 Correct 50 ms 5068 KB Output is correct
59 Correct 54 ms 5068 KB Output is correct
60 Correct 94 ms 5124 KB Output is correct
61 Correct 50 ms 5068 KB Output is correct
62 Correct 101 ms 5188 KB Output is correct
63 Correct 72 ms 5020 KB Output is correct
64 Execution timed out 1588 ms 13192 KB Time limit exceeded
65 Halted 0 ms 0 KB -