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Submission #493641

# Submission time Handle Problem Language Result Execution time Memory
493641 2021-12-12T12:50:08 Z 600Mihnea Power Plant (JOI20_power) C++17
47 / 100
 1500 ms 23432 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 = 0) {
  for (auto &b : g[a]) {
    if (b != p) {
      dfs(b, a);
    }
  }
  compute(a, p);
}

void rer(int p, int a) {
  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]);
  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 4988 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 2 ms 5016 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 4 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 3 ms 4988 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 2 ms 5016 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 4 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 4 ms 5068 KB Output is correct
23 Correct 3 ms 5068 KB Output is correct
24 Correct 3 ms 5068 KB Output is correct
25 Correct 3 ms 5068 KB Output is correct
26 Correct 3 ms 5068 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 4 ms 5068 KB Output is correct
29 Correct 3 ms 5068 KB Output is correct
30 Correct 5 ms 5068 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5012 KB Output is correct
37 Correct 7 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 3 ms 5068 KB Output is correct
40 Correct 3 ms 5088 KB Output is correct
41 Correct 3 ms 5068 KB Output is correct
42 Correct 3 ms 5068 KB Output is correct
43 Correct 3 ms 5020 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 5044 KB Output is correct
47 Correct 4 ms 5032 KB Output is correct
48 Correct 8 ms 5068 KB Output is correct
49 Correct 4 ms 5068 KB Output is correct
50 Correct 4 ms 5132 KB Output is correct
51 Correct 4 ms 5068 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 5 ms 5068 KB Output is correct
54 Correct 4 ms 5068 KB Output is correct
55 Correct 3 ms 5068 KB Output is correct
56 Correct 11 ms 5116 KB Output is correct
57 Correct 3 ms 5068 KB Output is correct
58 Correct 10 ms 5112 KB Output is correct
59 Correct 9 ms 5068 KB Output is correct
60 Correct 3 ms 5056 KB Output is correct
61 Correct 11 ms 5068 KB Output is correct
62 Correct 3 ms 5068 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 4988 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 2 ms 5016 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 4 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 4 ms 5068 KB Output is correct
23 Correct 3 ms 5068 KB Output is correct
24 Correct 3 ms 5068 KB Output is correct
25 Correct 3 ms 5068 KB Output is correct
26 Correct 3 ms 5068 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 4 ms 5068 KB Output is correct
29 Correct 3 ms 5068 KB Output is correct
30 Correct 5 ms 5068 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5012 KB Output is correct
37 Correct 7 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 3 ms 5068 KB Output is correct
40 Correct 3 ms 5088 KB Output is correct
41 Correct 3 ms 5068 KB Output is correct
42 Correct 3 ms 5068 KB Output is correct
43 Correct 3 ms 5020 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 5044 KB Output is correct
47 Correct 4 ms 5032 KB Output is correct
48 Correct 8 ms 5068 KB Output is correct
49 Correct 4 ms 5068 KB Output is correct
50 Correct 4 ms 5132 KB Output is correct
51 Correct 4 ms 5068 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 5 ms 5068 KB Output is correct
54 Correct 4 ms 5068 KB Output is correct
55 Correct 3 ms 5068 KB Output is correct
56 Correct 11 ms 5116 KB Output is correct
57 Correct 3 ms 5068 KB Output is correct
58 Correct 10 ms 5112 KB Output is correct
59 Correct 9 ms 5068 KB Output is correct
60 Correct 3 ms 5056 KB Output is correct
61 Correct 11 ms 5068 KB Output is correct
62 Correct 3 ms 5068 KB Output is correct
63 Correct 3 ms 5068 KB Output is correct
64 Correct 164 ms 13248 KB Output is correct
65 Correct 164 ms 15928 KB Output is correct
66 Correct 162 ms 15904 KB Output is correct
67 Correct 175 ms 15972 KB Output is correct
68 Correct 183 ms 15864 KB Output is correct
69 Correct 170 ms 15968 KB Output is correct
70 Correct 160 ms 15856 KB Output is correct
71 Correct 168 ms 16060 KB Output is correct
72 Correct 171 ms 15928 KB Output is correct
73 Correct 206 ms 23392 KB Output is correct
74 Correct 204 ms 23432 KB Output is correct
75 Correct 157 ms 15788 KB Output is correct
76 Correct 149 ms 15756 KB Output is correct
77 Correct 168 ms 15812 KB Output is correct
78 Correct 148 ms 15868 KB Output is correct
79 Correct 157 ms 15748 KB Output is correct
80 Correct 179 ms 15832 KB Output is correct
81 Execution timed out 1585 ms 16244 KB Time limit exceeded
82 Halted 0 ms 0 KB -