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Submission #927795

# Submission time Handle Problem Language Result Execution time Memory
927795 2024-02-15T10:48:04 Z Amirreza_Fakhri Railway (BOI17_railway) C++17
100 / 100
 106 ms 23756 KB 
// In the name of the God
#include <bits/stdc++.h>
#define ll long long
// #define int long long
#define pb push_back
#define F first
#define S second
#define mp make_pair
#define pii pair <int, int>
#define smin(x, y) (x) = min((x), (y))
#define smax(x, y) (x) = max((x), (y))
#define all(x) (x).begin(), (x).end()
using namespace std;

const int inf = 1e9+7;
const int mod = 998244353;
const int maxn = 1e5+5, lg = 17;

int n, m, k, t = 0, in[maxn], out[maxn], cnt[maxn], par[lg][maxn];
vector <int> vec;
vector <pii> adj[maxn];

bool cmp(int v, int u) {
    return in[v] < in[u];
}

void dfs1(int v, int p) {
    in[v] = t++;
    par[0][v] = p;
    for (int i = 1; i < lg; i++) par[i][v] = par[i-1][par[i-1][v]];
    for (pii e : adj[v]) {
        if (e.F != p) dfs1(e.F, v);
    }
    out[v] = t;
}

bool is(int v, int u) {
    return in[v] <= in[u] and out[v] >= out[u];
}

int lca(int v, int u) {
    if (is(v, u)) return v;
    if (is(u, v)) return u;
    for (int i = lg-1; i >= 0; i--) {
        if (!is(par[i][v], u)) v = par[i][v];
    }
    return par[0][v];
}

void dfs2(int v, int p, int ed) {
    for (pii e : adj[v]) {
        if (e.F != p) {
            dfs2(e.F, v, e.S);
            cnt[v] += cnt[e.F];
        }
    }
    if (cnt[v] >= k) vec.pb(ed);
}

int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m >> k;
    for (int i = 1; i < n; i++) {
        int v, u; cin >> v >> u;
        adj[--v].pb(mp(--u, i));
        adj[u].pb(mp(v, i));
    }
    dfs1(0, 0);
    for (int i = 0; i < m; i++) {
        int s; cin >> s;
        for (int j = 0; j < s; j++) {
            int v; cin >> v;
            cnt[--v]++;
            vec.pb(v);
        }
        sort(all(vec), cmp);
        for (int i = 1; i < s; i++) cnt[lca(vec[i], vec[i-1])]--;
        cnt[lca(vec[0], vec[s-1])]--;
        vec.clear();
    }
    dfs2(0, 0, 0);
    sort(all(vec));
    cout << vec.size() << '\n';
    for (int e : vec) cout << e << ' ';
    cout << '\n';
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8796 KB Output is correct
2 Correct 5 ms 9364 KB Output is correct
3 Correct 4 ms 9304 KB Output is correct
4 Correct 1 ms 8804 KB Output is correct
5 Correct 2 ms 8792 KB Output is correct
6 Correct 4 ms 9932 KB Output is correct
7 Correct 5 ms 9564 KB Output is correct
8 Correct 4 ms 9308 KB Output is correct
9 Correct 5 ms 9524 KB Output is correct
10 Correct 2 ms 8792 KB Output is correct
11 Correct 2 ms 8796 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 1 ms 8796 KB Output is correct
14 Correct 2 ms 8792 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8796 KB Output is correct
2 Correct 5 ms 9364 KB Output is correct
3 Correct 4 ms 9304 KB Output is correct
4 Correct 1 ms 8804 KB Output is correct
5 Correct 2 ms 8792 KB Output is correct
6 Correct 4 ms 9932 KB Output is correct
7 Correct 5 ms 9564 KB Output is correct
8 Correct 4 ms 9308 KB Output is correct
9 Correct 5 ms 9524 KB Output is correct
10 Correct 2 ms 8792 KB Output is correct
11 Correct 2 ms 8796 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 1 ms 8796 KB Output is correct
14 Correct 2 ms 8792 KB Output is correct
15 Correct 23 ms 9844 KB Output is correct
16 Correct 19 ms 9816 KB Output is correct
17 Correct 25 ms 9820 KB Output is correct
18 Correct 6 ms 9884 KB Output is correct
19 Correct 4 ms 9564 KB Output is correct
20 Correct 22 ms 9824 KB Output is correct
21 Correct 25 ms 9820 KB Output is correct
22 Correct 1 ms 8796 KB Output is correct
23 Correct 4 ms 9308 KB Output is correct
24 Correct 5 ms 9308 KB Output is correct
25 Correct 1 ms 8796 KB Output is correct
26 Correct 2 ms 8796 KB Output is correct
27 Correct 4 ms 9820 KB Output is correct
28 Correct 4 ms 9360 KB Output is correct
29 Correct 4 ms 9308 KB Output is correct
30 Correct 4 ms 9308 KB Output is correct
31 Correct 2 ms 8796 KB Output is correct
32 Correct 1 ms 8796 KB Output is correct
33 Correct 1 ms 8796 KB Output is correct
34 Correct 2 ms 8796 KB Output is correct
35 Correct 2 ms 8796 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 23644 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 51 ms 23420 KB Output is correct
4 Correct 36 ms 22712 KB Output is correct
5 Correct 40 ms 23408 KB Output is correct
6 Correct 57 ms 23756 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 19324 KB Output is correct
2 Correct 55 ms 15700 KB Output is correct
3 Correct 92 ms 15184 KB Output is correct
4 Correct 58 ms 15180 KB Output is correct
5 Correct 71 ms 15248 KB Output is correct
6 Correct 54 ms 19356 KB Output is correct
7 Correct 45 ms 19284 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 19324 KB Output is correct
2 Correct 55 ms 15700 KB Output is correct
3 Correct 92 ms 15184 KB Output is correct
4 Correct 58 ms 15180 KB Output is correct
5 Correct 71 ms 15248 KB Output is correct
6 Correct 54 ms 19356 KB Output is correct
7 Correct 45 ms 19284 KB Output is correct
8 Correct 67 ms 19280 KB Output is correct
9 Correct 62 ms 19284 KB Output is correct
10 Correct 48 ms 23600 KB Output is correct
11 Correct 55 ms 23416 KB Output is correct
12 Correct 52 ms 15588 KB Output is correct
13 Correct 67 ms 15584 KB Output is correct
14 Correct 86 ms 15240 KB Output is correct
15 Correct 59 ms 15272 KB Output is correct
16 Correct 69 ms 15360 KB Output is correct
17 Correct 57 ms 15332 KB Output is correct
18 Correct 65 ms 15256 KB Output is correct
19 Correct 71 ms 15584 KB Output is correct
20 Correct 68 ms 19724 KB Output is correct
21 Correct 45 ms 19920 KB Output is correct
22 Correct 44 ms 19540 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8796 KB Output is correct
2 Correct 5 ms 9364 KB Output is correct
3 Correct 4 ms 9304 KB Output is correct
4 Correct 1 ms 8804 KB Output is correct
5 Correct 2 ms 8792 KB Output is correct
6 Correct 4 ms 9932 KB Output is correct
7 Correct 5 ms 9564 KB Output is correct
8 Correct 4 ms 9308 KB Output is correct
9 Correct 5 ms 9524 KB Output is correct
10 Correct 2 ms 8792 KB Output is correct
11 Correct 2 ms 8796 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 1 ms 8796 KB Output is correct
14 Correct 2 ms 8792 KB Output is correct
15 Correct 23 ms 9844 KB Output is correct
16 Correct 19 ms 9816 KB Output is correct
17 Correct 25 ms 9820 KB Output is correct
18 Correct 6 ms 9884 KB Output is correct
19 Correct 4 ms 9564 KB Output is correct
20 Correct 22 ms 9824 KB Output is correct
21 Correct 25 ms 9820 KB Output is correct
22 Correct 1 ms 8796 KB Output is correct
23 Correct 4 ms 9308 KB Output is correct
24 Correct 5 ms 9308 KB Output is correct
25 Correct 1 ms 8796 KB Output is correct
26 Correct 2 ms 8796 KB Output is correct
27 Correct 4 ms 9820 KB Output is correct
28 Correct 4 ms 9360 KB Output is correct
29 Correct 4 ms 9308 KB Output is correct
30 Correct 4 ms 9308 KB Output is correct
31 Correct 2 ms 8796 KB Output is correct
32 Correct 1 ms 8796 KB Output is correct
33 Correct 1 ms 8796 KB Output is correct
34 Correct 2 ms 8796 KB Output is correct
35 Correct 2 ms 8796 KB Output is correct
36 Correct 54 ms 23644 KB Output is correct
37 Correct 1 ms 8796 KB Output is correct
38 Correct 51 ms 23420 KB Output is correct
39 Correct 36 ms 22712 KB Output is correct
40 Correct 40 ms 23408 KB Output is correct
41 Correct 57 ms 23756 KB Output is correct
42 Correct 50 ms 19324 KB Output is correct
43 Correct 55 ms 15700 KB Output is correct
44 Correct 92 ms 15184 KB Output is correct
45 Correct 58 ms 15180 KB Output is correct
46 Correct 71 ms 15248 KB Output is correct
47 Correct 54 ms 19356 KB Output is correct
48 Correct 45 ms 19284 KB Output is correct
49 Correct 67 ms 19280 KB Output is correct
50 Correct 62 ms 19284 KB Output is correct
51 Correct 48 ms 23600 KB Output is correct
52 Correct 55 ms 23416 KB Output is correct
53 Correct 52 ms 15588 KB Output is correct
54 Correct 67 ms 15584 KB Output is correct
55 Correct 86 ms 15240 KB Output is correct
56 Correct 59 ms 15272 KB Output is correct
57 Correct 69 ms 15360 KB Output is correct
58 Correct 57 ms 15332 KB Output is correct
59 Correct 65 ms 15256 KB Output is correct
60 Correct 71 ms 15584 KB Output is correct
61 Correct 68 ms 19724 KB Output is correct
62 Correct 45 ms 19920 KB Output is correct
63 Correct 44 ms 19540 KB Output is correct
64 Correct 52 ms 19676 KB Output is correct
65 Correct 65 ms 15452 KB Output is correct
66 Correct 89 ms 15384 KB Output is correct
67 Correct 61 ms 15384 KB Output is correct
68 Correct 47 ms 15408 KB Output is correct
69 Correct 63 ms 15188 KB Output is correct
70 Correct 54 ms 20136 KB Output is correct
71 Correct 63 ms 19024 KB Output is correct
72 Correct 1 ms 8792 KB Output is correct
73 Correct 4 ms 9304 KB Output is correct
74 Correct 4 ms 9308 KB Output is correct
75 Correct 2 ms 8796 KB Output is correct
76 Correct 2 ms 8796 KB Output is correct
77 Correct 4 ms 9820 KB Output is correct
78 Correct 4 ms 9564 KB Output is correct
79 Correct 4 ms 9500 KB Output is correct
80 Correct 4 ms 9524 KB Output is correct
81 Correct 2 ms 8796 KB Output is correct
82 Correct 2 ms 8796 KB Output is correct
83 Correct 2 ms 8796 KB Output is correct
84 Correct 2 ms 8796 KB Output is correct
85 Correct 1 ms 8796 KB Output is correct
86 Correct 28 ms 9760 KB Output is correct
87 Correct 19 ms 9820 KB Output is correct
88 Correct 20 ms 9820 KB Output is correct
89 Correct 7 ms 9820 KB Output is correct
90 Correct 7 ms 9564 KB Output is correct
91 Correct 23 ms 9868 KB Output is correct
92 Correct 26 ms 9820 KB Output is correct
93 Correct 2 ms 8792 KB Output is correct
94 Correct 51 ms 23532 KB Output is correct
95 Correct 62 ms 23420 KB Output is correct
96 Correct 45 ms 22760 KB Output is correct
97 Correct 60 ms 23540 KB Output is correct
98 Correct 58 ms 23668 KB Output is correct
99 Correct 91 ms 15376 KB Output is correct
100 Correct 106 ms 15148 KB Output is correct
101 Correct 106 ms 15372 KB Output is correct
102 Correct 72 ms 15848 KB Output is correct
103 Correct 58 ms 19452 KB Output is correct
104 Correct 61 ms 20088 KB Output is correct
105 Correct 49 ms 19208 KB Output is correct
106 Correct 73 ms 19280 KB Output is correct
107 Correct 66 ms 19132 KB Output is correct
108 Correct 50 ms 23528 KB Output is correct
109 Correct 43 ms 23624 KB Output is correct
110 Correct 65 ms 15452 KB Output is correct
111 Correct 78 ms 15592 KB Output is correct
112 Correct 104 ms 15368 KB Output is correct
113 Correct 55 ms 15388 KB Output is correct