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Submission #493644

# Submission time Handle Problem Language Result Execution time Memory
493644 2021-12-12T12:53:01 Z 600Mihnea Power Plant (JOI20_power) C++17
100 / 100
 224 ms 24160 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]);
  dp[p] += max(dp[a], is[a]);
}

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 2 ms 4940 KB Output is correct
3 Correct 2 ms 4940 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 4940 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 2 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 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 2 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 2 ms 4940 KB Output is correct
3 Correct 2 ms 4940 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 4940 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 2 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 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 2 ms 4940 KB Output is correct
21 Correct 2 ms 4940 KB Output is correct
22 Correct 3 ms 5068 KB Output is correct
23 Correct 3 ms 5068 KB Output is correct
24 Correct 4 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 3 ms 5068 KB Output is correct
28 Correct 4 ms 5020 KB Output is correct
29 Correct 3 ms 5068 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 5068 KB Output is correct
33 Correct 3 ms 5068 KB Output is correct
34 Correct 3 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 3 ms 5096 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 5068 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 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 5196 KB Output is correct
48 Correct 3 ms 5068 KB Output is correct
49 Correct 3 ms 5068 KB Output is correct
50 Correct 3 ms 5068 KB Output is correct
51 Correct 3 ms 5068 KB Output is correct
52 Correct 3 ms 5068 KB Output is correct
53 Correct 3 ms 5080 KB Output is correct
54 Correct 3 ms 5068 KB Output is correct
55 Correct 3 ms 5068 KB Output is correct
56 Correct 3 ms 5068 KB Output is correct
57 Correct 3 ms 5068 KB Output is correct
58 Correct 3 ms 5068 KB Output is correct
59 Correct 3 ms 5068 KB Output is correct
60 Correct 4 ms 5068 KB Output is correct
61 Correct 4 ms 5068 KB Output is correct
62 Correct 3 ms 5044 KB Output is correct
63 Correct 4 ms 5068 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 ms 4940 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 4940 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 2 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 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 2 ms 4940 KB Output is correct
21 Correct 2 ms 4940 KB Output is correct
22 Correct 3 ms 5068 KB Output is correct
23 Correct 3 ms 5068 KB Output is correct
24 Correct 4 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 3 ms 5068 KB Output is correct
28 Correct 4 ms 5020 KB Output is correct
29 Correct 3 ms 5068 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 5068 KB Output is correct
33 Correct 3 ms 5068 KB Output is correct
34 Correct 3 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 3 ms 5096 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 5068 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 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 5196 KB Output is correct
48 Correct 3 ms 5068 KB Output is correct
49 Correct 3 ms 5068 KB Output is correct
50 Correct 3 ms 5068 KB Output is correct
51 Correct 3 ms 5068 KB Output is correct
52 Correct 3 ms 5068 KB Output is correct
53 Correct 3 ms 5080 KB Output is correct
54 Correct 3 ms 5068 KB Output is correct
55 Correct 3 ms 5068 KB Output is correct
56 Correct 3 ms 5068 KB Output is correct
57 Correct 3 ms 5068 KB Output is correct
58 Correct 3 ms 5068 KB Output is correct
59 Correct 3 ms 5068 KB Output is correct
60 Correct 4 ms 5068 KB Output is correct
61 Correct 4 ms 5068 KB Output is correct
62 Correct 3 ms 5044 KB Output is correct
63 Correct 4 ms 5068 KB Output is correct
64 Correct 151 ms 13244 KB Output is correct
65 Correct 133 ms 13188 KB Output is correct
66 Correct 165 ms 13252 KB Output is correct
67 Correct 161 ms 13252 KB Output is correct
68 Correct 145 ms 13256 KB Output is correct
69 Correct 131 ms 13224 KB Output is correct
70 Correct 150 ms 13160 KB Output is correct
71 Correct 184 ms 13252 KB Output is correct
72 Correct 150 ms 13180 KB Output is correct
73 Correct 193 ms 20676 KB Output is correct
74 Correct 224 ms 20660 KB Output is correct
75 Correct 156 ms 13096 KB Output is correct
76 Correct 136 ms 13112 KB Output is correct
77 Correct 146 ms 13048 KB Output is correct
78 Correct 149 ms 13164 KB Output is correct
79 Correct 188 ms 13068 KB Output is correct
80 Correct 157 ms 13076 KB Output is correct
81 Correct 115 ms 13528 KB Output is correct
82 Correct 147 ms 16028 KB Output is correct
83 Correct 211 ms 18968 KB Output is correct
84 Correct 168 ms 20392 KB Output is correct
85 Correct 176 ms 20004 KB Output is correct
86 Correct 161 ms 16776 KB Output is correct
87 Correct 143 ms 16392 KB Output is correct
88 Correct 158 ms 16836 KB Output is correct
89 Correct 142 ms 16872 KB Output is correct
90 Correct 137 ms 16812 KB Output is correct
91 Correct 136 ms 16872 KB Output is correct
92 Correct 143 ms 17140 KB Output is correct
93 Correct 165 ms 18404 KB Output is correct
94 Correct 138 ms 19460 KB Output is correct
95 Correct 129 ms 18616 KB Output is correct
96 Correct 136 ms 17648 KB Output is correct
97 Correct 181 ms 16744 KB Output is correct
98 Correct 137 ms 16484 KB Output is correct
99 Correct 150 ms 16256 KB Output is correct
100 Correct 149 ms 18180 KB Output is correct
101 Correct 158 ms 17004 KB Output is correct
102 Correct 147 ms 16620 KB Output is correct
103 Correct 147 ms 16460 KB Output is correct
104 Correct 90 ms 16748 KB Output is correct
105 Correct 197 ms 21512 KB Output is correct
106 Correct 68 ms 16628 KB Output is correct
107 Correct 82 ms 16736 KB Output is correct
108 Correct 192 ms 23892 KB Output is correct
109 Correct 77 ms 16808 KB Output is correct
110 Correct 183 ms 24160 KB Output is correct
111 Correct 147 ms 15896 KB Output is correct