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Submission #297787

# Submission time Handle Problem Language Result Execution time Memory
297787 2020-09-11T23:09:18 Z eriksuenderhauf Power Plant (JOI20_power) C++17
100 / 100
 245 ms 25704 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 5;
vector<int> adj[N];
int dp[N], rsm[N], sm[N], val[N];

int dfs(int u, int p = -1) {
  dp[u] = -val[u]; // don't cut
  for (int v: adj[u]) if (v != p)
    sm[u] += dfs(v, u);
  return dp[u] = max(-dp[u], dp[u] + sm[u]);
}

void reroot(int u, int p = -1) {
  rsm[u] = sm[u] + (~p ? max(val[p], -val[p] + rsm[p] - dp[u]) : 0);
  dp[u] = max(val[u], rsm[u] - val[u]);
  for (int v: adj[u]) if (v != p)
    reroot(v, u);
}

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
  int n; cin >> n;
  for (int i = 1, u, v; i < n; i++) {
    cin >> u >> v; u--, v--;
    adj[u].push_back(v);
    adj[v].push_back(u);
  }
  string s; cin >> s;
  int ans = 0;
  for (int i = 0; i < n; i++)
    ans += val[i] = (s[i] == '1');
  ans = min(ans, 2);
  dfs(0);
  reroot(0);
  for (int i = 0; i < n; i++)
    ans = max(ans, dp[i]);
  cout << ans << "\n";
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 3 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 3 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 3 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 3 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 5120 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 5120 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 3 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 3 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 3 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 3 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 5120 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 4 ms 5120 KB Output is correct
25 Correct 4 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 4 ms 5120 KB Output is correct
29 Correct 4 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 4 ms 5120 KB Output is correct
36 Correct 5 ms 5120 KB Output is correct
37 Correct 4 ms 5120 KB Output is correct
38 Correct 4 ms 5120 KB Output is correct
39 Correct 5 ms 5248 KB Output is correct
40 Correct 4 ms 5120 KB Output is correct
41 Correct 4 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 4 ms 5248 KB Output is correct
45 Correct 4 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 4 ms 5120 KB Output is correct
48 Correct 5 ms 5376 KB Output is correct
49 Correct 5 ms 5248 KB Output is correct
50 Correct 4 ms 5248 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 4 ms 5120 KB Output is correct
53 Correct 4 ms 5120 KB Output is correct
54 Correct 4 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 4 ms 5248 KB Output is correct
58 Correct 4 ms 5120 KB Output is correct
59 Correct 4 ms 5120 KB Output is correct
60 Correct 5 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5228 KB Output is correct
63 Correct 4 ms 5120 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 3 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 3 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 3 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 3 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 5120 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 4 ms 5120 KB Output is correct
25 Correct 4 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 4 ms 5120 KB Output is correct
29 Correct 4 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 4 ms 5120 KB Output is correct
36 Correct 5 ms 5120 KB Output is correct
37 Correct 4 ms 5120 KB Output is correct
38 Correct 4 ms 5120 KB Output is correct
39 Correct 5 ms 5248 KB Output is correct
40 Correct 4 ms 5120 KB Output is correct
41 Correct 4 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 4 ms 5248 KB Output is correct
45 Correct 4 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 4 ms 5120 KB Output is correct
48 Correct 5 ms 5376 KB Output is correct
49 Correct 5 ms 5248 KB Output is correct
50 Correct 4 ms 5248 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 4 ms 5120 KB Output is correct
53 Correct 4 ms 5120 KB Output is correct
54 Correct 4 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 4 ms 5248 KB Output is correct
58 Correct 4 ms 5120 KB Output is correct
59 Correct 4 ms 5120 KB Output is correct
60 Correct 5 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5228 KB Output is correct
63 Correct 4 ms 5120 KB Output is correct
64 Correct 209 ms 17636 KB Output is correct
65 Correct 204 ms 17720 KB Output is correct
66 Correct 217 ms 17572 KB Output is correct
67 Correct 200 ms 17592 KB Output is correct
68 Correct 203 ms 17516 KB Output is correct
69 Correct 199 ms 17716 KB Output is correct
70 Correct 201 ms 17708 KB Output is correct
71 Correct 204 ms 17732 KB Output is correct
72 Correct 204 ms 17588 KB Output is correct
73 Correct 240 ms 25144 KB Output is correct
74 Correct 234 ms 25016 KB Output is correct
75 Correct 201 ms 17464 KB Output is correct
76 Correct 203 ms 17476 KB Output is correct
77 Correct 213 ms 17588 KB Output is correct
78 Correct 218 ms 17464 KB Output is correct
79 Correct 211 ms 17472 KB Output is correct
80 Correct 209 ms 17588 KB Output is correct
81 Correct 157 ms 17908 KB Output is correct
82 Correct 182 ms 17656 KB Output is correct
83 Correct 221 ms 20548 KB Output is correct
84 Correct 219 ms 21960 KB Output is correct
85 Correct 217 ms 21700 KB Output is correct
86 Correct 202 ms 18388 KB Output is correct
87 Correct 205 ms 17972 KB Output is correct
88 Correct 186 ms 18548 KB Output is correct
89 Correct 185 ms 18568 KB Output is correct
90 Correct 192 ms 18332 KB Output is correct
91 Correct 188 ms 18520 KB Output is correct
92 Correct 184 ms 18728 KB Output is correct
93 Correct 182 ms 19968 KB Output is correct
94 Correct 175 ms 21100 KB Output is correct
95 Correct 174 ms 20336 KB Output is correct
96 Correct 186 ms 19368 KB Output is correct
97 Correct 195 ms 18328 KB Output is correct
98 Correct 183 ms 18084 KB Output is correct
99 Correct 195 ms 18036 KB Output is correct
100 Correct 184 ms 19876 KB Output is correct
101 Correct 185 ms 18612 KB Output is correct
102 Correct 184 ms 18308 KB Output is correct
103 Correct 197 ms 18136 KB Output is correct
104 Correct 109 ms 17640 KB Output is correct
105 Correct 235 ms 23224 KB Output is correct
106 Correct 106 ms 17512 KB Output is correct
107 Correct 111 ms 17516 KB Output is correct
108 Correct 245 ms 25528 KB Output is correct
109 Correct 106 ms 17644 KB Output is correct
110 Correct 230 ms 25704 KB Output is correct
111 Correct 181 ms 17736 KB Output is correct