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Submission #630721

# Submission time Handle Problem Language Result Execution time Memory
630721 2022-08-17T02:51:26 Z bachhoangxuan Railway (BOI17_railway) C++17
100 / 100
 125 ms 23652 KB 
#include<bits/stdc++.h>
using namespace std;
#define maxn 100005
#define pii pair<int,int>
int mp[maxn];
int ans[maxn],sum[maxn],pos[maxn],n,m,k,s[maxn],son[maxn],res=0;
vector<int> add[maxn];
vector<pii> edge[maxn];
void dfs(int u,int par){
    sum[u]=(int)add[u].size()+1;
    for(pii v:edge[u]){
        if(v.first==par) continue;
        dfs(v.first,u);
        sum[u]+=sum[v.first];
        if(sum[v.first]>sum[son[u]]){son[u]=v.first;pos[u]=v.second;}
    }
}
void ad(int v){
    int x=mp[v];
    if(x==0) res++;
    if(x+1==s[v]) res--;
    mp[v]++;
}
void calc(int u,int par){
    for(int v:add[u]) ad(v);
    for(pii v:edge[u]){
        if(v.first==par) continue;
        calc(v.first,u);
    }
}
void del(int u,int par){
    for(int v:add[u]) mp[v]=0;
    for(pii v:edge[u]){
        if(v.first==par) continue;
        del(v.first,u);
    }
}
void dfs2(int u,int par,int era,int id){
    for(pii v:edge[u]){
        if(v.first==par || v.first==son[u]) continue;
        dfs2(v.first,u,1,v.second);
    }
    if(son[u]!=0) dfs2(son[u],u,0,pos[u]);
    for(pii v:edge[u]){
        if(v.first==par || v.first==son[u]) continue;
        calc(v.first,u);
    }
    for(int v:add[u]) ad(v);
    ans[id]=res;
    if(era){del(u,par);res=0;}
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    cin >> n >> m >> k;
    for(int i=1;i<n;i++){
        int u,v;cin >> u >> v;
        edge[u].push_back({v,i});
        edge[v].push_back({u,i});
    }
    for(int i=1;i<=m;i++){
        cin >> s[i];
        for(int j=1;j<=s[i];j++){
            int a;cin >> a;
            add[a].push_back(i);
        }
    }
    dfs(1,0);dfs2(1,0,0,0);
    int num=0;
    for(int i=1;i<n;i++){
        if(ans[i]>=k) num++;
    }
    cout << num << '\n';
    for(int i=1;i<n;i++){
        if(ans[i]>=k) cout << i << ' ';
    }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 7 ms 5540 KB Output is correct
3 Correct 8 ms 5540 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 7 ms 6100 KB Output is correct
7 Correct 7 ms 5716 KB Output is correct
8 Correct 5 ms 5548 KB Output is correct
9 Correct 6 ms 5588 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4984 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 7 ms 5540 KB Output is correct
3 Correct 8 ms 5540 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 7 ms 6100 KB Output is correct
7 Correct 7 ms 5716 KB Output is correct
8 Correct 5 ms 5548 KB Output is correct
9 Correct 6 ms 5588 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4984 KB Output is correct
15 Correct 21 ms 6120 KB Output is correct
16 Correct 18 ms 6100 KB Output is correct
17 Correct 18 ms 6216 KB Output is correct
18 Correct 7 ms 5972 KB Output is correct
19 Correct 7 ms 5740 KB Output is correct
20 Correct 17 ms 6356 KB Output is correct
21 Correct 18 ms 6372 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 7 ms 5544 KB Output is correct
24 Correct 7 ms 5480 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 7 ms 6100 KB Output is correct
28 Correct 9 ms 5716 KB Output is correct
29 Correct 5 ms 5588 KB Output is correct
30 Correct 5 ms 5588 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 3 ms 4948 KB Output is correct
33 Correct 3 ms 4948 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 3 ms 4980 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 21872 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 76 ms 21840 KB Output is correct
4 Correct 58 ms 21468 KB Output is correct
5 Correct 76 ms 21572 KB Output is correct
6 Correct 65 ms 21624 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 15896 KB Output is correct
2 Correct 73 ms 13476 KB Output is correct
3 Correct 89 ms 13084 KB Output is correct
4 Correct 91 ms 13060 KB Output is correct
5 Correct 96 ms 13096 KB Output is correct
6 Correct 63 ms 17736 KB Output is correct
7 Correct 61 ms 17816 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 15896 KB Output is correct
2 Correct 73 ms 13476 KB Output is correct
3 Correct 89 ms 13084 KB Output is correct
4 Correct 91 ms 13060 KB Output is correct
5 Correct 96 ms 13096 KB Output is correct
6 Correct 63 ms 17736 KB Output is correct
7 Correct 61 ms 17816 KB Output is correct
8 Correct 65 ms 18428 KB Output is correct
9 Correct 73 ms 18440 KB Output is correct
10 Correct 63 ms 23212 KB Output is correct
11 Correct 61 ms 23236 KB Output is correct
12 Correct 70 ms 13100 KB Output is correct
13 Correct 63 ms 12956 KB Output is correct
14 Correct 89 ms 12712 KB Output is correct
15 Correct 91 ms 12620 KB Output is correct
16 Correct 85 ms 13192 KB Output is correct
17 Correct 90 ms 13064 KB Output is correct
18 Correct 93 ms 13044 KB Output is correct
19 Correct 68 ms 13600 KB Output is correct
20 Correct 54 ms 17828 KB Output is correct
21 Correct 56 ms 17904 KB Output is correct
22 Correct 58 ms 17852 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 7 ms 5540 KB Output is correct
3 Correct 8 ms 5540 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 7 ms 6100 KB Output is correct
7 Correct 7 ms 5716 KB Output is correct
8 Correct 5 ms 5548 KB Output is correct
9 Correct 6 ms 5588 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4984 KB Output is correct
15 Correct 21 ms 6120 KB Output is correct
16 Correct 18 ms 6100 KB Output is correct
17 Correct 18 ms 6216 KB Output is correct
18 Correct 7 ms 5972 KB Output is correct
19 Correct 7 ms 5740 KB Output is correct
20 Correct 17 ms 6356 KB Output is correct
21 Correct 18 ms 6372 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 7 ms 5544 KB Output is correct
24 Correct 7 ms 5480 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 7 ms 6100 KB Output is correct
28 Correct 9 ms 5716 KB Output is correct
29 Correct 5 ms 5588 KB Output is correct
30 Correct 5 ms 5588 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 3 ms 4948 KB Output is correct
33 Correct 3 ms 4948 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 3 ms 4980 KB Output is correct
36 Correct 74 ms 21872 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 76 ms 21840 KB Output is correct
39 Correct 58 ms 21468 KB Output is correct
40 Correct 76 ms 21572 KB Output is correct
41 Correct 65 ms 21624 KB Output is correct
42 Correct 53 ms 15896 KB Output is correct
43 Correct 73 ms 13476 KB Output is correct
44 Correct 89 ms 13084 KB Output is correct
45 Correct 91 ms 13060 KB Output is correct
46 Correct 96 ms 13096 KB Output is correct
47 Correct 63 ms 17736 KB Output is correct
48 Correct 61 ms 17816 KB Output is correct
49 Correct 65 ms 18428 KB Output is correct
50 Correct 73 ms 18440 KB Output is correct
51 Correct 63 ms 23212 KB Output is correct
52 Correct 61 ms 23236 KB Output is correct
53 Correct 70 ms 13100 KB Output is correct
54 Correct 63 ms 12956 KB Output is correct
55 Correct 89 ms 12712 KB Output is correct
56 Correct 91 ms 12620 KB Output is correct
57 Correct 85 ms 13192 KB Output is correct
58 Correct 90 ms 13064 KB Output is correct
59 Correct 93 ms 13044 KB Output is correct
60 Correct 68 ms 13600 KB Output is correct
61 Correct 54 ms 17828 KB Output is correct
62 Correct 56 ms 17904 KB Output is correct
63 Correct 58 ms 17852 KB Output is correct
64 Correct 78 ms 18364 KB Output is correct
65 Correct 125 ms 14496 KB Output is correct
66 Correct 119 ms 14044 KB Output is correct
67 Correct 125 ms 13700 KB Output is correct
68 Correct 73 ms 12404 KB Output is correct
69 Correct 60 ms 12364 KB Output is correct
70 Correct 70 ms 18608 KB Output is correct
71 Correct 59 ms 18360 KB Output is correct
72 Correct 2 ms 4948 KB Output is correct
73 Correct 7 ms 5588 KB Output is correct
74 Correct 7 ms 5692 KB Output is correct
75 Correct 3 ms 5024 KB Output is correct
76 Correct 3 ms 4948 KB Output is correct
77 Correct 7 ms 6228 KB Output is correct
78 Correct 6 ms 5812 KB Output is correct
79 Correct 6 ms 5588 KB Output is correct
80 Correct 8 ms 5680 KB Output is correct
81 Correct 3 ms 5020 KB Output is correct
82 Correct 3 ms 5028 KB Output is correct
83 Correct 3 ms 4948 KB Output is correct
84 Correct 3 ms 4948 KB Output is correct
85 Correct 3 ms 4948 KB Output is correct
86 Correct 19 ms 6596 KB Output is correct
87 Correct 18 ms 6612 KB Output is correct
88 Correct 18 ms 6612 KB Output is correct
89 Correct 7 ms 6100 KB Output is correct
90 Correct 7 ms 5840 KB Output is correct
91 Correct 19 ms 6956 KB Output is correct
92 Correct 18 ms 6868 KB Output is correct
93 Correct 3 ms 4948 KB Output is correct
94 Correct 70 ms 23652 KB Output is correct
95 Correct 68 ms 23612 KB Output is correct
96 Correct 58 ms 23244 KB Output is correct
97 Correct 62 ms 23296 KB Output is correct
98 Correct 66 ms 23636 KB Output is correct
99 Correct 123 ms 13160 KB Output is correct
100 Correct 82 ms 13092 KB Output is correct
101 Correct 85 ms 13132 KB Output is correct
102 Correct 69 ms 13532 KB Output is correct
103 Correct 54 ms 17732 KB Output is correct
104 Correct 54 ms 17872 KB Output is correct
105 Correct 58 ms 17720 KB Output is correct
106 Correct 69 ms 18504 KB Output is correct
107 Correct 70 ms 18444 KB Output is correct
108 Correct 61 ms 23176 KB Output is correct
109 Correct 60 ms 23220 KB Output is correct
110 Correct 55 ms 13104 KB Output is correct
111 Correct 62 ms 12968 KB Output is correct
112 Correct 100 ms 12636 KB Output is correct
113 Correct 81 ms 12620 KB Output is correct