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Submission #432116

# Submission time Handle Problem Language Result Execution time Memory
432116 2021-06-17T21:12:24 Z SirCovidThe19th Railway (BOI17_railway) C++14
100 / 100
 236 ms 22980 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(){
    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 2 ms 2636 KB Output is correct
2 Correct 13 ms 3872 KB Output is correct
3 Correct 11 ms 3840 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 12 ms 4300 KB Output is correct
7 Correct 12 ms 3916 KB Output is correct
8 Correct 10 ms 3924 KB Output is correct
9 Correct 11 ms 3932 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 3 ms 2636 KB Output is correct
14 Correct 3 ms 2636 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 13 ms 3872 KB Output is correct
3 Correct 11 ms 3840 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 12 ms 4300 KB Output is correct
7 Correct 12 ms 3916 KB Output is correct
8 Correct 10 ms 3924 KB Output is correct
9 Correct 11 ms 3932 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 3 ms 2636 KB Output is correct
14 Correct 3 ms 2636 KB Output is correct
15 Correct 49 ms 3936 KB Output is correct
16 Correct 51 ms 3932 KB Output is correct
17 Correct 46 ms 3944 KB Output is correct
18 Correct 12 ms 4316 KB Output is correct
19 Correct 13 ms 3964 KB Output is correct
20 Correct 43 ms 3984 KB Output is correct
21 Correct 46 ms 3972 KB Output is correct
22 Correct 3 ms 2636 KB Output is correct
23 Correct 15 ms 3916 KB Output is correct
24 Correct 13 ms 3956 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2636 KB Output is correct
27 Correct 12 ms 4300 KB Output is correct
28 Correct 12 ms 4000 KB Output is correct
29 Correct 10 ms 3876 KB Output is correct
30 Correct 10 ms 3976 KB Output is correct
31 Correct 2 ms 2636 KB Output is correct
32 Correct 2 ms 2636 KB Output is correct
33 Correct 2 ms 2636 KB Output is correct
34 Correct 2 ms 2636 KB Output is correct
35 Correct 2 ms 2636 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 149 ms 22800 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 152 ms 22460 KB Output is correct
4 Correct 143 ms 21868 KB Output is correct
5 Correct 142 ms 22844 KB Output is correct
6 Correct 180 ms 22932 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 180 ms 18244 KB Output is correct
2 Correct 200 ms 14880 KB Output is correct
3 Correct 203 ms 14596 KB Output is correct
4 Correct 226 ms 14536 KB Output is correct
5 Correct 233 ms 14584 KB Output is correct
6 Correct 163 ms 18320 KB Output is correct
7 Correct 199 ms 18204 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 180 ms 18244 KB Output is correct
2 Correct 200 ms 14880 KB Output is correct
3 Correct 203 ms 14596 KB Output is correct
4 Correct 226 ms 14536 KB Output is correct
5 Correct 233 ms 14584 KB Output is correct
6 Correct 163 ms 18320 KB Output is correct
7 Correct 199 ms 18204 KB Output is correct
8 Correct 180 ms 18484 KB Output is correct
9 Correct 184 ms 18504 KB Output is correct
10 Correct 145 ms 22864 KB Output is correct
11 Correct 162 ms 22724 KB Output is correct
12 Correct 146 ms 14844 KB Output is correct
13 Correct 175 ms 14688 KB Output is correct
14 Correct 206 ms 14544 KB Output is correct
15 Correct 193 ms 14464 KB Output is correct
16 Correct 207 ms 14636 KB Output is correct
17 Correct 208 ms 14536 KB Output is correct
18 Correct 209 ms 14584 KB Output is correct
19 Correct 236 ms 14924 KB Output is correct
20 Correct 190 ms 18500 KB Output is correct
21 Correct 167 ms 18700 KB Output is correct
22 Correct 184 ms 18552 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 13 ms 3872 KB Output is correct
3 Correct 11 ms 3840 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 12 ms 4300 KB Output is correct
7 Correct 12 ms 3916 KB Output is correct
8 Correct 10 ms 3924 KB Output is correct
9 Correct 11 ms 3932 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 3 ms 2636 KB Output is correct
14 Correct 3 ms 2636 KB Output is correct
15 Correct 49 ms 3936 KB Output is correct
16 Correct 51 ms 3932 KB Output is correct
17 Correct 46 ms 3944 KB Output is correct
18 Correct 12 ms 4316 KB Output is correct
19 Correct 13 ms 3964 KB Output is correct
20 Correct 43 ms 3984 KB Output is correct
21 Correct 46 ms 3972 KB Output is correct
22 Correct 3 ms 2636 KB Output is correct
23 Correct 15 ms 3916 KB Output is correct
24 Correct 13 ms 3956 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2636 KB Output is correct
27 Correct 12 ms 4300 KB Output is correct
28 Correct 12 ms 4000 KB Output is correct
29 Correct 10 ms 3876 KB Output is correct
30 Correct 10 ms 3976 KB Output is correct
31 Correct 2 ms 2636 KB Output is correct
32 Correct 2 ms 2636 KB Output is correct
33 Correct 2 ms 2636 KB Output is correct
34 Correct 2 ms 2636 KB Output is correct
35 Correct 2 ms 2636 KB Output is correct
36 Correct 149 ms 22800 KB Output is correct
37 Correct 2 ms 2636 KB Output is correct
38 Correct 152 ms 22460 KB Output is correct
39 Correct 143 ms 21868 KB Output is correct
40 Correct 142 ms 22844 KB Output is correct
41 Correct 180 ms 22932 KB Output is correct
42 Correct 180 ms 18244 KB Output is correct
43 Correct 200 ms 14880 KB Output is correct
44 Correct 203 ms 14596 KB Output is correct
45 Correct 226 ms 14536 KB Output is correct
46 Correct 233 ms 14584 KB Output is correct
47 Correct 163 ms 18320 KB Output is correct
48 Correct 199 ms 18204 KB Output is correct
49 Correct 180 ms 18484 KB Output is correct
50 Correct 184 ms 18504 KB Output is correct
51 Correct 145 ms 22864 KB Output is correct
52 Correct 162 ms 22724 KB Output is correct
53 Correct 146 ms 14844 KB Output is correct
54 Correct 175 ms 14688 KB Output is correct
55 Correct 206 ms 14544 KB Output is correct
56 Correct 193 ms 14464 KB Output is correct
57 Correct 207 ms 14636 KB Output is correct
58 Correct 208 ms 14536 KB Output is correct
59 Correct 209 ms 14584 KB Output is correct
60 Correct 236 ms 14924 KB Output is correct
61 Correct 190 ms 18500 KB Output is correct
62 Correct 167 ms 18700 KB Output is correct
63 Correct 184 ms 18552 KB Output is correct
64 Correct 177 ms 18612 KB Output is correct
65 Correct 231 ms 14528 KB Output is correct
66 Correct 225 ms 14484 KB Output is correct
67 Correct 190 ms 14580 KB Output is correct
68 Correct 147 ms 14876 KB Output is correct
69 Correct 181 ms 14788 KB Output is correct
70 Correct 189 ms 18940 KB Output is correct
71 Correct 172 ms 18348 KB Output is correct
72 Correct 2 ms 2636 KB Output is correct
73 Correct 12 ms 3916 KB Output is correct
74 Correct 11 ms 3912 KB Output is correct
75 Correct 2 ms 2636 KB Output is correct
76 Correct 2 ms 2636 KB Output is correct
77 Correct 16 ms 4320 KB Output is correct
78 Correct 16 ms 4008 KB Output is correct
79 Correct 10 ms 3916 KB Output is correct
80 Correct 10 ms 3948 KB Output is correct
81 Correct 2 ms 2636 KB Output is correct
82 Correct 3 ms 2636 KB Output is correct
83 Correct 2 ms 2636 KB Output is correct
84 Correct 2 ms 2636 KB Output is correct
85 Correct 2 ms 2636 KB Output is correct
86 Correct 45 ms 3912 KB Output is correct
87 Correct 41 ms 3928 KB Output is correct
88 Correct 53 ms 3936 KB Output is correct
89 Correct 14 ms 4368 KB Output is correct
90 Correct 15 ms 3916 KB Output is correct
91 Correct 51 ms 4036 KB Output is correct
92 Correct 47 ms 3956 KB Output is correct
93 Correct 2 ms 2636 KB Output is correct
94 Correct 149 ms 22584 KB Output is correct
95 Correct 151 ms 22340 KB Output is correct
96 Correct 140 ms 21736 KB Output is correct
97 Correct 142 ms 22664 KB Output is correct
98 Correct 184 ms 22784 KB Output is correct
99 Correct 211 ms 14568 KB Output is correct
100 Correct 209 ms 14544 KB Output is correct
101 Correct 205 ms 14532 KB Output is correct
102 Correct 214 ms 14872 KB Output is correct
103 Correct 187 ms 18368 KB Output is correct
104 Correct 173 ms 18560 KB Output is correct
105 Correct 164 ms 18116 KB Output is correct
106 Correct 235 ms 18760 KB Output is correct
107 Correct 176 ms 18500 KB Output is correct
108 Correct 139 ms 22844 KB Output is correct
109 Correct 144 ms 22980 KB Output is correct
110 Correct 164 ms 14792 KB Output is correct
111 Correct 144 ms 14672 KB Output is correct
112 Correct 216 ms 14496 KB Output is correct
113 Correct 201 ms 14576 KB Output is correct