oj.uz

Submission #296155

# Submission time Handle Problem Language Result Execution time Memory
296155 2020-09-10T10:57:14 Z eriksuenderhauf Power Plant (JOI20_power) C++17
100 / 100
 244 ms 25784 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 5;
vector<int> adj[N];
int dp[N], rsm[N], sm[N];

string s;

void dfs(int u, int p = -1) {
  dp[u] = -(s[u] == '1'); // don't cut
  sm[u] = 0;
  for (int v: adj[u]) if (v != p) {
    dfs(v, u);
    sm[u] += dp[v];
  }
  dp[u] = max(-dp[u], dp[u] + sm[u]);
}

void reroot(int u, int p = -1) {
  if (~p) {
    int vp = s[p] == '1' ? 1 : 0;
    rsm[u] = sm[u] + max(vp, -vp + rsm[p] - dp[u]);
  } else {
    rsm[u] = sm[u];
  }
  int vu = s[u] == '1' ? 1 : 0;
  dp[u] = max(vu, rsm[u] - vu);
  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);
  }
  cin >> s;
  int ans = 0;
  for (int i = 0; i < n; i++)
    ans += 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 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 4 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 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 5120 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 5012 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 3 ms 4992 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 4 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 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 5120 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 5012 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 3 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 4 ms 5120 KB Output is correct
28 Correct 4 ms 5120 KB Output is correct
29 Correct 5 ms 5248 KB Output is correct
30 Correct 4 ms 5248 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 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 4 ms 5120 KB Output is correct
37 Correct 4 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 4 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 5 ms 5248 KB Output is correct
45 Correct 4 ms 5120 KB Output is correct
46 Correct 4 ms 5120 KB Output is correct
47 Correct 4 ms 5120 KB Output is correct
48 Correct 4 ms 5248 KB Output is correct
49 Correct 4 ms 5248 KB Output is correct
50 Correct 4 ms 5248 KB Output is correct
51 Correct 4 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 4 ms 5120 KB Output is correct
56 Correct 4 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 4 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5236 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 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 4 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 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 5120 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 5012 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 3 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 4 ms 5120 KB Output is correct
28 Correct 4 ms 5120 KB Output is correct
29 Correct 5 ms 5248 KB Output is correct
30 Correct 4 ms 5248 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 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 4 ms 5120 KB Output is correct
37 Correct 4 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 4 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 5 ms 5248 KB Output is correct
45 Correct 4 ms 5120 KB Output is correct
46 Correct 4 ms 5120 KB Output is correct
47 Correct 4 ms 5120 KB Output is correct
48 Correct 4 ms 5248 KB Output is correct
49 Correct 4 ms 5248 KB Output is correct
50 Correct 4 ms 5248 KB Output is correct
51 Correct 4 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 4 ms 5120 KB Output is correct
56 Correct 4 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 4 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5236 KB Output is correct
63 Correct 4 ms 5120 KB Output is correct
64 Correct 202 ms 14780 KB Output is correct
65 Correct 212 ms 14748 KB Output is correct
66 Correct 214 ms 14756 KB Output is correct
67 Correct 207 ms 14780 KB Output is correct
68 Correct 202 ms 14884 KB Output is correct
69 Correct 206 ms 14772 KB Output is correct
70 Correct 207 ms 14788 KB Output is correct
71 Correct 208 ms 14660 KB Output is correct
72 Correct 207 ms 14900 KB Output is correct
73 Correct 244 ms 24888 KB Output is correct
74 Correct 240 ms 24724 KB Output is correct
75 Correct 199 ms 14648 KB Output is correct
76 Correct 207 ms 14656 KB Output is correct
77 Correct 212 ms 14620 KB Output is correct
78 Correct 221 ms 14784 KB Output is correct
79 Correct 217 ms 14656 KB Output is correct
80 Correct 229 ms 14736 KB Output is correct
81 Correct 167 ms 15220 KB Output is correct
82 Correct 188 ms 14968 KB Output is correct
83 Correct 221 ms 18748 KB Output is correct
84 Correct 226 ms 20552 KB Output is correct
85 Correct 224 ms 20292 KB Output is correct
86 Correct 206 ms 15800 KB Output is correct
87 Correct 210 ms 15540 KB Output is correct
88 Correct 194 ms 15860 KB Output is correct
89 Correct 202 ms 15816 KB Output is correct
90 Correct 198 ms 15772 KB Output is correct
91 Correct 201 ms 15900 KB Output is correct
92 Correct 195 ms 16168 KB Output is correct
93 Correct 194 ms 18088 KB Output is correct
94 Correct 185 ms 19440 KB Output is correct
95 Correct 178 ms 18288 KB Output is correct
96 Correct 194 ms 16804 KB Output is correct
97 Correct 196 ms 15636 KB Output is correct
98 Correct 187 ms 15336 KB Output is correct
99 Correct 210 ms 15028 KB Output is correct
100 Correct 194 ms 17700 KB Output is correct
101 Correct 190 ms 16052 KB Output is correct
102 Correct 192 ms 15528 KB Output is correct
103 Correct 200 ms 15320 KB Output is correct
104 Correct 109 ms 15468 KB Output is correct
105 Correct 242 ms 22652 KB Output is correct
106 Correct 110 ms 15592 KB Output is correct
107 Correct 108 ms 15596 KB Output is correct
108 Correct 243 ms 25400 KB Output is correct
109 Correct 110 ms 15468 KB Output is correct
110 Correct 244 ms 25784 KB Output is correct
111 Correct 188 ms 14664 KB Output is correct