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Submission #432113

# Submission time Handle Problem Language Result Execution time Memory
432113 2021-06-17T21:11:12 Z SirCovidThe19th Railway (BOI17_railway) C++14
100 / 100
 164 ms 22912 KB 
#include <bits/stdc++.h>
using namespace std;

const int mx = 1e5+5, ml = 17;

int n, m, k, tin[mx], tout[mx], cnt = 0, up[ml][mx], depth[mx], weight[mx]; 
vector<pair<int, int>> adj[mx]; vector<int> ans;

void dfs(int node){
    tin[node] = ++cnt;
    for (int l = 1; l < ml; l++) up[l][node] = up[l-1][up[l-1][node]];
    for (pair<int, int> nxt : adj[node])
        if (nxt.first != up[0][node])
            depth[nxt.first] = depth[node]+1, up[0][nxt.first] = node, dfs(nxt.first);
    tout[node] = cnt;
}
bool isAnc(int a, int b){ 
    return tin[a] <= tin[b] and tout[a] >= tout[b]; 
}
int lca(int a, int b){
    if (isAnc(a, b)) return a; 
    if (isAnc(b, a)) return b;
    for (int l = ml-1; l >= 0; l--) 
        if (up[l][a] != 0 and !isAnc(up[l][a], b)) 
            a = up[l][a];
    return up[0][a];
}
int solve(int node){
    int ret = weight[node];
    for (pair<int, int> nxt : adj[node])
        if (nxt.first != up[0][node]){
            int val = solve(nxt.first); ret += val;
            if (val >= k) ans.push_back(nxt.second);
        }
    return ret;
}
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); 
    cin >> n >> m >> k;
    for (int i = 1; i < n; i++){
        int a, b; cin >> a >> b;
        adj[a].push_back({b, i}); adj[b].push_back({a, i});
    }dfs(1);
    for (int i = 0; i < m; i++){
        int s; cin >> s; int cn[s+1];
        for (int j = 0; j < s; j++) cin >> cn[j];
        sort(cn, cn+s, [](int a, int b) { return tin[a] < tin[b]; } ); cn[s] = cn[0];
        for (int j = 0; j < s; j++) weight[lca(cn[j], cn[j+1])]--, weight[cn[j+1]]++;
    }solve(1); sort(ans.begin(), ans.end());
    cout<<ans.size()<<endl; for (int res : ans) cout<<res<<" ";
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2732 KB Output is correct
2 Correct 7 ms 3916 KB Output is correct
3 Correct 7 ms 3916 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2764 KB Output is correct
6 Correct 9 ms 4300 KB Output is correct
7 Correct 7 ms 4044 KB Output is correct
8 Correct 6 ms 3916 KB Output is correct
9 Correct 6 ms 3916 KB Output is correct
10 Correct 2 ms 2764 KB Output is correct
11 Correct 2 ms 2764 KB Output is correct
12 Correct 2 ms 2764 KB Output is correct
13 Correct 2 ms 2764 KB Output is correct
14 Correct 2 ms 2764 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2732 KB Output is correct
2 Correct 7 ms 3916 KB Output is correct
3 Correct 7 ms 3916 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2764 KB Output is correct
6 Correct 9 ms 4300 KB Output is correct
7 Correct 7 ms 4044 KB Output is correct
8 Correct 6 ms 3916 KB Output is correct
9 Correct 6 ms 3916 KB Output is correct
10 Correct 2 ms 2764 KB Output is correct
11 Correct 2 ms 2764 KB Output is correct
12 Correct 2 ms 2764 KB Output is correct
13 Correct 2 ms 2764 KB Output is correct
14 Correct 2 ms 2764 KB Output is correct
15 Correct 24 ms 3968 KB Output is correct
16 Correct 25 ms 3984 KB Output is correct
17 Correct 24 ms 4060 KB Output is correct
18 Correct 9 ms 4300 KB Output is correct
19 Correct 10 ms 4008 KB Output is correct
20 Correct 20 ms 4052 KB Output is correct
21 Correct 24 ms 3916 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 7 ms 3940 KB Output is correct
24 Correct 7 ms 3928 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2764 KB Output is correct
27 Correct 7 ms 4400 KB Output is correct
28 Correct 7 ms 4044 KB Output is correct
29 Correct 6 ms 3916 KB Output is correct
30 Correct 7 ms 3968 KB Output is correct
31 Correct 2 ms 2636 KB Output is correct
32 Correct 2 ms 2636 KB Output is correct
33 Correct 3 ms 2764 KB Output is correct
34 Correct 2 ms 2764 KB Output is correct
35 Correct 2 ms 2764 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 22672 KB Output is correct
2 Correct 2 ms 2764 KB Output is correct
3 Correct 71 ms 22288 KB Output is correct
4 Correct 64 ms 21792 KB Output is correct
5 Correct 90 ms 22720 KB Output is correct
6 Correct 96 ms 22848 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 18188 KB Output is correct
2 Correct 153 ms 14908 KB Output is correct
3 Correct 164 ms 14560 KB Output is correct
4 Correct 147 ms 14560 KB Output is correct
5 Correct 122 ms 14604 KB Output is correct
6 Correct 90 ms 18352 KB Output is correct
7 Correct 88 ms 18232 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 18188 KB Output is correct
2 Correct 153 ms 14908 KB Output is correct
3 Correct 164 ms 14560 KB Output is correct
4 Correct 147 ms 14560 KB Output is correct
5 Correct 122 ms 14604 KB Output is correct
6 Correct 90 ms 18352 KB Output is correct
7 Correct 88 ms 18232 KB Output is correct
8 Correct 135 ms 18496 KB Output is correct
9 Correct 142 ms 18528 KB Output is correct
10 Correct 73 ms 22844 KB Output is correct
11 Correct 73 ms 22844 KB Output is correct
12 Correct 86 ms 14796 KB Output is correct
13 Correct 110 ms 14788 KB Output is correct
14 Correct 140 ms 14608 KB Output is correct
15 Correct 151 ms 14584 KB Output is correct
16 Correct 150 ms 14604 KB Output is correct
17 Correct 157 ms 14692 KB Output is correct
18 Correct 144 ms 14584 KB Output is correct
19 Correct 143 ms 14904 KB Output is correct
20 Correct 95 ms 18588 KB Output is correct
21 Correct 96 ms 18672 KB Output is correct
22 Correct 112 ms 18552 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2732 KB Output is correct
2 Correct 7 ms 3916 KB Output is correct
3 Correct 7 ms 3916 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2764 KB Output is correct
6 Correct 9 ms 4300 KB Output is correct
7 Correct 7 ms 4044 KB Output is correct
8 Correct 6 ms 3916 KB Output is correct
9 Correct 6 ms 3916 KB Output is correct
10 Correct 2 ms 2764 KB Output is correct
11 Correct 2 ms 2764 KB Output is correct
12 Correct 2 ms 2764 KB Output is correct
13 Correct 2 ms 2764 KB Output is correct
14 Correct 2 ms 2764 KB Output is correct
15 Correct 24 ms 3968 KB Output is correct
16 Correct 25 ms 3984 KB Output is correct
17 Correct 24 ms 4060 KB Output is correct
18 Correct 9 ms 4300 KB Output is correct
19 Correct 10 ms 4008 KB Output is correct
20 Correct 20 ms 4052 KB Output is correct
21 Correct 24 ms 3916 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 7 ms 3940 KB Output is correct
24 Correct 7 ms 3928 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2764 KB Output is correct
27 Correct 7 ms 4400 KB Output is correct
28 Correct 7 ms 4044 KB Output is correct
29 Correct 6 ms 3916 KB Output is correct
30 Correct 7 ms 3968 KB Output is correct
31 Correct 2 ms 2636 KB Output is correct
32 Correct 2 ms 2636 KB Output is correct
33 Correct 3 ms 2764 KB Output is correct
34 Correct 2 ms 2764 KB Output is correct
35 Correct 2 ms 2764 KB Output is correct
36 Correct 76 ms 22672 KB Output is correct
37 Correct 2 ms 2764 KB Output is correct
38 Correct 71 ms 22288 KB Output is correct
39 Correct 64 ms 21792 KB Output is correct
40 Correct 90 ms 22720 KB Output is correct
41 Correct 96 ms 22848 KB Output is correct
42 Correct 114 ms 18188 KB Output is correct
43 Correct 153 ms 14908 KB Output is correct
44 Correct 164 ms 14560 KB Output is correct
45 Correct 147 ms 14560 KB Output is correct
46 Correct 122 ms 14604 KB Output is correct
47 Correct 90 ms 18352 KB Output is correct
48 Correct 88 ms 18232 KB Output is correct
49 Correct 135 ms 18496 KB Output is correct
50 Correct 142 ms 18528 KB Output is correct
51 Correct 73 ms 22844 KB Output is correct
52 Correct 73 ms 22844 KB Output is correct
53 Correct 86 ms 14796 KB Output is correct
54 Correct 110 ms 14788 KB Output is correct
55 Correct 140 ms 14608 KB Output is correct
56 Correct 151 ms 14584 KB Output is correct
57 Correct 150 ms 14604 KB Output is correct
58 Correct 157 ms 14692 KB Output is correct
59 Correct 144 ms 14584 KB Output is correct
60 Correct 143 ms 14904 KB Output is correct
61 Correct 95 ms 18588 KB Output is correct
62 Correct 96 ms 18672 KB Output is correct
63 Correct 112 ms 18552 KB Output is correct
64 Correct 139 ms 18640 KB Output is correct
65 Correct 152 ms 14608 KB Output is correct
66 Correct 136 ms 14600 KB Output is correct
67 Correct 140 ms 14600 KB Output is correct
68 Correct 103 ms 14888 KB Output is correct
69 Correct 110 ms 14764 KB Output is correct
70 Correct 111 ms 19000 KB Output is correct
71 Correct 109 ms 18372 KB Output is correct
72 Correct 3 ms 2636 KB Output is correct
73 Correct 7 ms 3916 KB Output is correct
74 Correct 7 ms 3936 KB Output is correct
75 Correct 2 ms 2636 KB Output is correct
76 Correct 2 ms 2764 KB Output is correct
77 Correct 8 ms 4416 KB Output is correct
78 Correct 10 ms 3992 KB Output is correct
79 Correct 6 ms 3916 KB Output is correct
80 Correct 7 ms 3916 KB Output is correct
81 Correct 2 ms 2688 KB Output is correct
82 Correct 2 ms 2764 KB Output is correct
83 Correct 2 ms 2636 KB Output is correct
84 Correct 2 ms 2764 KB Output is correct
85 Correct 2 ms 2636 KB Output is correct
86 Correct 24 ms 3976 KB Output is correct
87 Correct 22 ms 3984 KB Output is correct
88 Correct 23 ms 3976 KB Output is correct
89 Correct 8 ms 4300 KB Output is correct
90 Correct 7 ms 4044 KB Output is correct
91 Correct 26 ms 4044 KB Output is correct
92 Correct 25 ms 4004 KB Output is correct
93 Correct 2 ms 2636 KB Output is correct
94 Correct 78 ms 22676 KB Output is correct
95 Correct 71 ms 22292 KB Output is correct
96 Correct 66 ms 21792 KB Output is correct
97 Correct 73 ms 22716 KB Output is correct
98 Correct 91 ms 22848 KB Output is correct
99 Correct 143 ms 14584 KB Output is correct
100 Correct 128 ms 14608 KB Output is correct
101 Correct 128 ms 14804 KB Output is correct
102 Correct 142 ms 14908 KB Output is correct
103 Correct 96 ms 18256 KB Output is correct
104 Correct 112 ms 18636 KB Output is correct
105 Correct 101 ms 18220 KB Output is correct
106 Correct 123 ms 18864 KB Output is correct
107 Correct 122 ms 18500 KB Output is correct
108 Correct 74 ms 22912 KB Output is correct
109 Correct 72 ms 22796 KB Output is correct
110 Correct 93 ms 14700 KB Output is correct
111 Correct 96 ms 14820 KB Output is correct
112 Correct 143 ms 14516 KB Output is correct
113 Correct 152 ms 14532 KB Output is correct