oj.uz

Submission #439668

# Submission time Handle Problem Language Result Execution time Memory
439668 2021-06-30T13:50:13 Z Ya_Ali Railway (BOI17_railway) C++17
100 / 100
 165 ms 34208 KB 
/* ** *** In the name of God *** ** */
// Only Haider is Amir al-Momenin
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll maxn = 1e5 + 10, lg = 17;
const ll mod = 1e9 + 7;
#define endl '\n'
ll tin [maxn], tout [maxn], anc [maxn][lg], H [maxn], khar_and_mother [maxn], tala [maxn], T, n, m, k;
vector <pair<ll, ll>> g [maxn];
vector <ll> A, ali;
void DFS (const ll &v = 1, const ll &pr = 1) {
	tin[v] = ++T;
	H[v] = H[pr] + 1;
	anc[v][0] = pr;
	for (ll i = 1; i < lg; i++) anc[v][i] = anc[anc[v][i - 1]][i - 1];
	for (auto &u : g[v]) if (u.first != pr) DFS(u.first, v);
	tout[v] = T;
}
 
inline ll up (ll v, const ll &d) { for (ll i = lg; i--;) if (d >> i & 1) v = anc[v][i]; return v; }
inline ll lca (ll v, ll u) {
	if (H[v] > H[u]) swap(v, u);
	u = up(u, H[u] - H[v]);
	if (v == u) return v;
	for (ll i = lg; i--;) if (anc[v][i] ^ anc[u][i]) v = anc[v][i], u = anc[u][i];
	return anc[v][0];
}
 
void add (ll s) {
	sort(A.begin(), A.end(), [&](const ll &v, const ll &u) { return tin[v] < tin[u]; });
	for (ll i = 1; i < s; i++) A.push_back(lca(A[i - 1], A[i]));
	sort(A.begin(), A.end(), [&](const ll &v, const ll &u) { return tin[v] < tin[u]; });
	A.resize(unique(A.begin(), A.end()) - A.begin());
	ali.clear();
	for (auto &v : A) {
		while (!ali.empty() && !(tin[ali.back()] <= tin[v] && tout[v] <= tout[ali.back()])) ali.pop_back();
		if (!ali.empty()) khar_and_mother[v] = ali.back();
		else khar_and_mother[v] = -1;
		ali.push_back(v);
	}
	for (auto &v : A) if (khar_and_mother[v] != -1) tala[v]++, tala[khar_and_mother[v]]--;
}
 
ll what_the_fuck (const ll &v = 1, const ll &ep = 0) {
	for (auto &u : g[v]) if (u.first != anc[v][0]) tala[v] += what_the_fuck(u.first, u.second);
	if (ep && tala[v] >= k) A.push_back(ep);
	return tala[v];
}
 
int main () {
	ios::sync_with_stdio(0);
        cin.tie(0); cout.tie(0);
 
	cin>> n >> m >> k;

	for (ll i = 1, v, u; i < n; i++) cin>> v >> u, g[v].push_back({u, i}), g[u].push_back({v, i});
	DFS();
	for (ll s; m--;) {
		cin >> s;
		A.resize(s);
		for (auto &x : A) cin >> x;
		add(s);
	}
	A.clear();
	what_the_fuck();
	sort(A.begin(), A.end());
	cout<< A.size() << endl;
	for (auto i : A) cout<< i << ' ';
	return 0;
}
/*
		  _ _ _ _                  _ _ _ _                _ _ _ _
		/      / \                /     / |              /     / |
	       /``````\   \              |`````|  |             |`````|  |
	      /        \   \             |     |  |             |     |  |
	     /          \   \            |     |  |             |     |  |
	    /     /\     \   \           |     |  |             |     |  |
	   /     / /\     \   \          |     |  |             |     |  |
	  /     / /  \     \   \         |     |  |             |     |  |
	 /     / /_ _ \     \   \        |     |  |             |     |  |
	/     /_ _ _ _ \     \   \       |     |  |             |     |  |
       /                      \   \      |     |  |_ _ _ _      |     |  |
      /      _ _ _ _ _ _ _     \   \     |     | /        /|    |     |  |
     /     / /            \     \   \    |     |/_ _ _ _ / |    |     |  |
    /     / /              \     \  /    |               | /    |     | /
   /_ _ _/_/                \_ _ _\/     |_ _ _ _ _ _ _ _|/     |_ _ _|/
*/

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 9 ms 4940 KB Output is correct
3 Correct 9 ms 4940 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 9 ms 5452 KB Output is correct
7 Correct 9 ms 5068 KB Output is correct
8 Correct 8 ms 4992 KB Output is correct
9 Correct 8 ms 4940 KB Output is correct
10 Correct 3 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 2 ms 2636 KB Output is correct
14 Correct 2 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 9 ms 4940 KB Output is correct
3 Correct 9 ms 4940 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 9 ms 5452 KB Output is correct
7 Correct 9 ms 5068 KB Output is correct
8 Correct 8 ms 4992 KB Output is correct
9 Correct 8 ms 4940 KB Output is correct
10 Correct 3 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 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 35 ms 5304 KB Output is correct
16 Correct 37 ms 5548 KB Output is correct
17 Correct 36 ms 5516 KB Output is correct
18 Correct 9 ms 5340 KB Output is correct
19 Correct 8 ms 4996 KB Output is correct
20 Correct 31 ms 5436 KB Output is correct
21 Correct 36 ms 5512 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 8 ms 4988 KB Output is correct
24 Correct 8 ms 4940 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2636 KB Output is correct
27 Correct 10 ms 5392 KB Output is correct
28 Correct 9 ms 5068 KB Output is correct
29 Correct 8 ms 4992 KB Output is correct
30 Correct 8 ms 4940 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 139 ms 33848 KB Output is correct
2 Correct 2 ms 2712 KB Output is correct
3 Correct 146 ms 33348 KB Output is correct
4 Correct 127 ms 32580 KB Output is correct
5 Correct 161 ms 33992 KB Output is correct
6 Correct 136 ms 34208 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 109 ms 29524 KB Output is correct
2 Correct 135 ms 27072 KB Output is correct
3 Correct 136 ms 26692 KB Output is correct
4 Correct 143 ms 26820 KB Output is correct
5 Correct 132 ms 26764 KB Output is correct
6 Correct 108 ms 29828 KB Output is correct
7 Correct 107 ms 29552 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 109 ms 29524 KB Output is correct
2 Correct 135 ms 27072 KB Output is correct
3 Correct 136 ms 26692 KB Output is correct
4 Correct 143 ms 26820 KB Output is correct
5 Correct 132 ms 26764 KB Output is correct
6 Correct 108 ms 29828 KB Output is correct
7 Correct 107 ms 29552 KB Output is correct
8 Correct 149 ms 30112 KB Output is correct
9 Correct 147 ms 30144 KB Output is correct
10 Correct 132 ms 34016 KB Output is correct
11 Correct 139 ms 33892 KB Output is correct
12 Correct 120 ms 25920 KB Output is correct
13 Correct 119 ms 26036 KB Output is correct
14 Correct 144 ms 26684 KB Output is correct
15 Correct 159 ms 26616 KB Output is correct
16 Correct 143 ms 26792 KB Output is correct
17 Correct 135 ms 26744 KB Output is correct
18 Correct 133 ms 26692 KB Output is correct
19 Correct 123 ms 26972 KB Output is correct
20 Correct 107 ms 30060 KB Output is correct
21 Correct 112 ms 30016 KB Output is correct
22 Correct 107 ms 29968 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 9 ms 4940 KB Output is correct
3 Correct 9 ms 4940 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 9 ms 5452 KB Output is correct
7 Correct 9 ms 5068 KB Output is correct
8 Correct 8 ms 4992 KB Output is correct
9 Correct 8 ms 4940 KB Output is correct
10 Correct 3 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 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 35 ms 5304 KB Output is correct
16 Correct 37 ms 5548 KB Output is correct
17 Correct 36 ms 5516 KB Output is correct
18 Correct 9 ms 5340 KB Output is correct
19 Correct 8 ms 4996 KB Output is correct
20 Correct 31 ms 5436 KB Output is correct
21 Correct 36 ms 5512 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 8 ms 4988 KB Output is correct
24 Correct 8 ms 4940 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2636 KB Output is correct
27 Correct 10 ms 5392 KB Output is correct
28 Correct 9 ms 5068 KB Output is correct
29 Correct 8 ms 4992 KB Output is correct
30 Correct 8 ms 4940 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 139 ms 33848 KB Output is correct
37 Correct 2 ms 2712 KB Output is correct
38 Correct 146 ms 33348 KB Output is correct
39 Correct 127 ms 32580 KB Output is correct
40 Correct 161 ms 33992 KB Output is correct
41 Correct 136 ms 34208 KB Output is correct
42 Correct 109 ms 29524 KB Output is correct
43 Correct 135 ms 27072 KB Output is correct
44 Correct 136 ms 26692 KB Output is correct
45 Correct 143 ms 26820 KB Output is correct
46 Correct 132 ms 26764 KB Output is correct
47 Correct 108 ms 29828 KB Output is correct
48 Correct 107 ms 29552 KB Output is correct
49 Correct 149 ms 30112 KB Output is correct
50 Correct 147 ms 30144 KB Output is correct
51 Correct 132 ms 34016 KB Output is correct
52 Correct 139 ms 33892 KB Output is correct
53 Correct 120 ms 25920 KB Output is correct
54 Correct 119 ms 26036 KB Output is correct
55 Correct 144 ms 26684 KB Output is correct
56 Correct 159 ms 26616 KB Output is correct
57 Correct 143 ms 26792 KB Output is correct
58 Correct 135 ms 26744 KB Output is correct
59 Correct 133 ms 26692 KB Output is correct
60 Correct 123 ms 26972 KB Output is correct
61 Correct 107 ms 30060 KB Output is correct
62 Correct 112 ms 30016 KB Output is correct
63 Correct 107 ms 29968 KB Output is correct
64 Correct 141 ms 30224 KB Output is correct
65 Correct 154 ms 26692 KB Output is correct
66 Correct 165 ms 26692 KB Output is correct
67 Correct 161 ms 26656 KB Output is correct
68 Correct 110 ms 25836 KB Output is correct
69 Correct 102 ms 25800 KB Output is correct
70 Correct 132 ms 30644 KB Output is correct
71 Correct 134 ms 29852 KB Output is correct
72 Correct 3 ms 2636 KB Output is correct
73 Correct 8 ms 4940 KB Output is correct
74 Correct 9 ms 4996 KB Output is correct
75 Correct 3 ms 2636 KB Output is correct
76 Correct 2 ms 2636 KB Output is correct
77 Correct 9 ms 5452 KB Output is correct
78 Correct 9 ms 5068 KB Output is correct
79 Correct 7 ms 4864 KB Output is correct
80 Correct 9 ms 4940 KB Output is correct
81 Correct 2 ms 2636 KB Output is correct
82 Correct 2 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 34 ms 5368 KB Output is correct
87 Correct 35 ms 5444 KB Output is correct
88 Correct 38 ms 5428 KB Output is correct
89 Correct 9 ms 5324 KB Output is correct
90 Correct 9 ms 5048 KB Output is correct
91 Correct 32 ms 5592 KB Output is correct
92 Correct 35 ms 5436 KB Output is correct
93 Correct 2 ms 2636 KB Output is correct
94 Correct 139 ms 33892 KB Output is correct
95 Correct 136 ms 33392 KB Output is correct
96 Correct 139 ms 32620 KB Output is correct
97 Correct 148 ms 33976 KB Output is correct
98 Correct 138 ms 34204 KB Output is correct
99 Correct 140 ms 26944 KB Output is correct
100 Correct 128 ms 26688 KB Output is correct
101 Correct 128 ms 26792 KB Output is correct
102 Correct 143 ms 27152 KB Output is correct
103 Correct 111 ms 29612 KB Output is correct
104 Correct 115 ms 30088 KB Output is correct
105 Correct 104 ms 29576 KB Output is correct
106 Correct 135 ms 30260 KB Output is correct
107 Correct 142 ms 30108 KB Output is correct
108 Correct 155 ms 34008 KB Output is correct
109 Correct 148 ms 33996 KB Output is correct
110 Correct 113 ms 25920 KB Output is correct
111 Correct 123 ms 26040 KB Output is correct
112 Correct 135 ms 26692 KB Output is correct
113 Correct 137 ms 26668 KB Output is correct