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답안 #511810

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
511810 2022-01-16T04:35:11 Z czhang2718 Power Plant (JOI20_power) C++17
100 / 100
 286 ms 30400 KB 
#include "bits/stdc++.h"
using namespace std;

const int N=200001;

int n;
vector<int> adj[N];
int dp[N][2];
int up[N];
string s;
int ans=1;

void dfs(int x, int par){
  dp[x][1]=(s[x]=='1'?1:-1e9);
  dp[x][0]=(s[x]=='1')*(-1);
  for(int k:adj[x]){
    if(k==par) continue;
    dfs(k, x);
    dp[x][0]+=max({0, dp[k][0], dp[k][1]});
    if(s[x]=='1' && s[k]=='1') ans=max(ans, 2);
  }
  // cout << "dp[" << x << "][" << 0 << "] " << dp[x][0] << '\n';
}

void dfs2(int x, int par){
  up[x]=max(up[x], 0);
  // cout << "up " << x << " " << up[x] << "\n";
  int sum=up[x];
  for(int k:adj[x]){
    if(k==par) continue;
    sum+=max({0, dp[k][0], dp[k][1]});
  }
  for(int k:adj[x]){
    if(k==par) continue;
    up[k]=max(dp[x][1], (s[x]=='1')*(-1)+sum-max({0, dp[k][0], dp[k][1]}));
    dfs2(k, x);
    ans=max(ans, dp[k][0]+up[k]);
  } 
}

int main(){
  cin.tie(0)->sync_with_stdio(0);

  cin >> n;
  for(int i=1; i<n; i++){
    int u, v; cin >> u >> v;
    adj[u].push_back(v);
    adj[v].push_back(u);
  }
  cin >> s;
  s='0'+s;

  dfs(1, 0);
  dfs2(1, 0);
  cout << ans;
}

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 5012 KB Output is correct
4 Correct 3 ms 5016 KB Output is correct
5 Correct 3 ms 4952 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 5008 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 7 ms 4940 KB Output is correct
13 Correct 4 ms 5012 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5020 KB Output is correct
16 Correct 3 ms 5020 KB Output is correct
17 Correct 3 ms 5012 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 4 ms 5024 KB Output is correct
21 Correct 3 ms 4948 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 5012 KB Output is correct
4 Correct 3 ms 5016 KB Output is correct
5 Correct 3 ms 4952 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 5008 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 7 ms 4940 KB Output is correct
13 Correct 4 ms 5012 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5020 KB Output is correct
16 Correct 3 ms 5020 KB Output is correct
17 Correct 3 ms 5012 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 4 ms 5024 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 5 ms 5072 KB Output is correct
23 Correct 5 ms 5004 KB Output is correct
24 Correct 6 ms 5068 KB Output is correct
25 Correct 6 ms 5084 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 5 ms 5152 KB Output is correct
30 Correct 7 ms 5148 KB Output is correct
31 Correct 7 ms 5068 KB Output is correct
32 Correct 3 ms 5068 KB Output is correct
33 Correct 4 ms 5028 KB Output is correct
34 Correct 4 ms 5028 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 5 ms 5068 KB Output is correct
37 Correct 5 ms 5080 KB Output is correct
38 Correct 3 ms 5068 KB Output is correct
39 Correct 4 ms 5196 KB Output is correct
40 Correct 5 ms 5068 KB Output is correct
41 Correct 3 ms 5196 KB Output is correct
42 Correct 5 ms 5016 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 5 ms 5068 KB Output is correct
45 Correct 3 ms 5068 KB Output is correct
46 Correct 4 ms 5152 KB Output is correct
47 Correct 3 ms 5068 KB Output is correct
48 Correct 4 ms 5156 KB Output is correct
49 Correct 3 ms 5152 KB Output is correct
50 Correct 3 ms 5068 KB Output is correct
51 Correct 4 ms 5160 KB Output is correct
52 Correct 4 ms 5080 KB Output is correct
53 Correct 4 ms 5072 KB Output is correct
54 Correct 4 ms 5072 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 5068 KB Output is correct
59 Correct 3 ms 5068 KB Output is correct
60 Correct 3 ms 5196 KB Output is correct
61 Correct 4 ms 5068 KB Output is correct
62 Correct 4 ms 5196 KB Output is correct
63 Correct 3 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 5012 KB Output is correct
4 Correct 3 ms 5016 KB Output is correct
5 Correct 3 ms 4952 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 5008 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 7 ms 4940 KB Output is correct
13 Correct 4 ms 5012 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5020 KB Output is correct
16 Correct 3 ms 5020 KB Output is correct
17 Correct 3 ms 5012 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 4 ms 5024 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 5 ms 5072 KB Output is correct
23 Correct 5 ms 5004 KB Output is correct
24 Correct 6 ms 5068 KB Output is correct
25 Correct 6 ms 5084 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 5 ms 5152 KB Output is correct
30 Correct 7 ms 5148 KB Output is correct
31 Correct 7 ms 5068 KB Output is correct
32 Correct 3 ms 5068 KB Output is correct
33 Correct 4 ms 5028 KB Output is correct
34 Correct 4 ms 5028 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 5 ms 5068 KB Output is correct
37 Correct 5 ms 5080 KB Output is correct
38 Correct 3 ms 5068 KB Output is correct
39 Correct 4 ms 5196 KB Output is correct
40 Correct 5 ms 5068 KB Output is correct
41 Correct 3 ms 5196 KB Output is correct
42 Correct 5 ms 5016 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 5 ms 5068 KB Output is correct
45 Correct 3 ms 5068 KB Output is correct
46 Correct 4 ms 5152 KB Output is correct
47 Correct 3 ms 5068 KB Output is correct
48 Correct 4 ms 5156 KB Output is correct
49 Correct 3 ms 5152 KB Output is correct
50 Correct 3 ms 5068 KB Output is correct
51 Correct 4 ms 5160 KB Output is correct
52 Correct 4 ms 5080 KB Output is correct
53 Correct 4 ms 5072 KB Output is correct
54 Correct 4 ms 5072 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 5068 KB Output is correct
59 Correct 3 ms 5068 KB Output is correct
60 Correct 3 ms 5196 KB Output is correct
61 Correct 4 ms 5068 KB Output is correct
62 Correct 4 ms 5196 KB Output is correct
63 Correct 3 ms 5068 KB Output is correct
64 Correct 189 ms 16756 KB Output is correct
65 Correct 215 ms 16716 KB Output is correct
66 Correct 188 ms 16700 KB Output is correct
67 Correct 231 ms 16680 KB Output is correct
68 Correct 166 ms 16704 KB Output is correct
69 Correct 195 ms 16716 KB Output is correct
70 Correct 221 ms 16756 KB Output is correct
71 Correct 214 ms 16752 KB Output is correct
72 Correct 192 ms 16752 KB Output is correct
73 Correct 231 ms 29288 KB Output is correct
74 Correct 286 ms 29204 KB Output is correct
75 Correct 196 ms 16644 KB Output is correct
76 Correct 199 ms 16576 KB Output is correct
77 Correct 255 ms 16628 KB Output is correct
78 Correct 183 ms 16648 KB Output is correct
79 Correct 216 ms 16620 KB Output is correct
80 Correct 181 ms 16648 KB Output is correct
81 Correct 156 ms 17052 KB Output is correct
82 Correct 182 ms 16852 KB Output is correct
83 Correct 226 ms 21756 KB Output is correct
84 Correct 188 ms 23924 KB Output is correct
85 Correct 195 ms 23652 KB Output is correct
86 Correct 251 ms 18040 KB Output is correct
87 Correct 207 ms 17460 KB Output is correct
88 Correct 221 ms 17992 KB Output is correct
89 Correct 244 ms 17912 KB Output is correct
90 Correct 197 ms 17784 KB Output is correct
91 Correct 211 ms 17984 KB Output is correct
92 Correct 150 ms 18276 KB Output is correct
93 Correct 214 ms 20700 KB Output is correct
94 Correct 151 ms 22436 KB Output is correct
95 Correct 161 ms 21044 KB Output is correct
96 Correct 217 ms 19272 KB Output is correct
97 Correct 175 ms 17740 KB Output is correct
98 Correct 174 ms 17240 KB Output is correct
99 Correct 181 ms 17180 KB Output is correct
100 Correct 172 ms 20292 KB Output is correct
101 Correct 236 ms 18220 KB Output is correct
102 Correct 154 ms 17424 KB Output is correct
103 Correct 176 ms 17328 KB Output is correct
104 Correct 153 ms 17532 KB Output is correct
105 Correct 204 ms 26120 KB Output is correct
106 Correct 90 ms 17436 KB Output is correct
107 Correct 130 ms 17432 KB Output is correct
108 Correct 213 ms 30048 KB Output is correct
109 Correct 108 ms 17632 KB Output is correct
110 Correct 218 ms 30400 KB Output is correct
111 Correct 167 ms 16576 KB Output is correct