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답안 #441198

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
441198 2021-07-04T14:55:30 Z peijar Power Plant (JOI20_power) C++17
100 / 100
 176 ms 23860 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAXN = 2e5;

vector<int> adj[MAXN];
bitset<MAXN> hasPower;
int dp[MAXN][2]; // DP[curNode][onBefore]

int nbSommets;

void dfs(int u, int p) {
  for (int v : adj[u])
    if (v != p)
      dfs(v, u);

  // Put power :
  if (hasPower[u]) {
    dp[u][0] = 1;
    for (int v : adj[u])
      if (v != p)
        dp[u][0] = max(dp[u][0], 1 + dp[v][1]);
    dp[u][1] = 1;
  }
  // Don't put power :
  // Put power in only one place :
  for (int v : adj[u])
    if (v != p) {
      for (int b = 0; b < 2; ++b)
        dp[u][b] = max(dp[u][b], dp[v][b] - (b and hasPower[u]));
    }
  // Or put power in multiple places :
  int tot = 0;
  for (int v : adj[u])
    if (v != p)
      tot += dp[v][1];
  dp[u][0] = max(dp[u][0], tot - hasPower[u]);
  dp[u][1] = max(dp[u][1], tot - hasPower[u]);
}

signed main(void) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);

  cin >> nbSommets;
  for (int i = 1; i < nbSommets; ++i) {
    int u, v;
    cin >> u >> v;
    --u, --v;
    adj[u].push_back(v);
    adj[v].push_back(u);
  }
  for (int i = 0; i < nbSommets; ++i) {
    char c;
    cin >> c;
    hasPower[i] = c == '1';
  }

  dfs(0, 0);
  cout << dp[0][0] << endl;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 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 3 ms 4940 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 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4988 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 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 3 ms 4940 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 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 3 ms 4940 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 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4988 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 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 3 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 4 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 4 ms 5196 KB Output is correct
30 Correct 4 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 5100 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 4 ms 5068 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 4 ms 5068 KB Output is correct
42 Correct 4 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 4 ms 5068 KB Output is correct
45 Correct 4 ms 5068 KB Output is correct
46 Correct 3 ms 5068 KB Output is correct
47 Correct 4 ms 5068 KB Output is correct
48 Correct 4 ms 5068 KB Output is correct
49 Correct 4 ms 5068 KB Output is correct
50 Correct 4 ms 5068 KB Output is correct
51 Correct 4 ms 5068 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 4 ms 5068 KB Output is correct
54 Correct 4 ms 5068 KB Output is correct
55 Correct 4 ms 5068 KB Output is correct
56 Correct 3 ms 5068 KB Output is correct
57 Correct 4 ms 5196 KB Output is correct
58 Correct 3 ms 5052 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 4 ms 5068 KB Output is correct
63 Correct 4 ms 5068 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 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 3 ms 4940 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 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4988 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 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 3 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 4 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 4 ms 5196 KB Output is correct
30 Correct 4 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 5100 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 4 ms 5068 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 4 ms 5068 KB Output is correct
42 Correct 4 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 4 ms 5068 KB Output is correct
45 Correct 4 ms 5068 KB Output is correct
46 Correct 3 ms 5068 KB Output is correct
47 Correct 4 ms 5068 KB Output is correct
48 Correct 4 ms 5068 KB Output is correct
49 Correct 4 ms 5068 KB Output is correct
50 Correct 4 ms 5068 KB Output is correct
51 Correct 4 ms 5068 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 4 ms 5068 KB Output is correct
54 Correct 4 ms 5068 KB Output is correct
55 Correct 4 ms 5068 KB Output is correct
56 Correct 3 ms 5068 KB Output is correct
57 Correct 4 ms 5196 KB Output is correct
58 Correct 3 ms 5052 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 4 ms 5068 KB Output is correct
63 Correct 4 ms 5068 KB Output is correct
64 Correct 150 ms 12848 KB Output is correct
65 Correct 164 ms 12868 KB Output is correct
66 Correct 152 ms 12920 KB Output is correct
67 Correct 143 ms 12864 KB Output is correct
68 Correct 145 ms 12904 KB Output is correct
69 Correct 143 ms 12872 KB Output is correct
70 Correct 150 ms 12972 KB Output is correct
71 Correct 139 ms 12860 KB Output is correct
72 Correct 145 ms 12836 KB Output is correct
73 Correct 160 ms 22924 KB Output is correct
74 Correct 164 ms 22956 KB Output is correct
75 Correct 134 ms 12824 KB Output is correct
76 Correct 142 ms 12740 KB Output is correct
77 Correct 138 ms 12828 KB Output is correct
78 Correct 155 ms 12964 KB Output is correct
79 Correct 145 ms 12736 KB Output is correct
80 Correct 148 ms 12748 KB Output is correct
81 Correct 143 ms 13200 KB Output is correct
82 Correct 135 ms 13124 KB Output is correct
83 Correct 153 ms 16984 KB Output is correct
84 Correct 154 ms 18712 KB Output is correct
85 Correct 176 ms 18488 KB Output is correct
86 Correct 163 ms 13952 KB Output is correct
87 Correct 153 ms 13472 KB Output is correct
88 Correct 156 ms 14028 KB Output is correct
89 Correct 139 ms 14040 KB Output is correct
90 Correct 150 ms 13896 KB Output is correct
91 Correct 140 ms 14056 KB Output is correct
92 Correct 135 ms 14276 KB Output is correct
93 Correct 137 ms 16208 KB Output is correct
94 Correct 139 ms 17724 KB Output is correct
95 Correct 142 ms 16444 KB Output is correct
96 Correct 150 ms 15096 KB Output is correct
97 Correct 131 ms 13812 KB Output is correct
98 Correct 133 ms 13432 KB Output is correct
99 Correct 136 ms 13252 KB Output is correct
100 Correct 138 ms 15776 KB Output is correct
101 Correct 147 ms 14140 KB Output is correct
102 Correct 127 ms 13604 KB Output is correct
103 Correct 157 ms 13472 KB Output is correct
104 Correct 85 ms 13624 KB Output is correct
105 Correct 160 ms 20496 KB Output is correct
106 Correct 97 ms 13640 KB Output is correct
107 Correct 91 ms 13720 KB Output is correct
108 Correct 158 ms 23620 KB Output is correct
109 Correct 92 ms 13608 KB Output is correct
110 Correct 161 ms 23860 KB Output is correct
111 Correct 151 ms 12728 KB Output is correct