oj.uz

답안 #503885

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
503885 2022-01-09T06:22:09 Z ac2hu Railway (BOI17_railway) C++14
100 / 100
 120 ms 29624 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 10;
const int LG = log2(N) + 10;
vector<int> adj[N];
int n,m,k,l, timer = 0;
vector<pair<int,int>> edges;
int lca_util[N][LG];
int tin[N],tout[N];
int dist[N];
int ans[N];
void dfs(int i,int p){
	tin[i] = ++timer;
	lca_util[i][0] = p;
	for(int j = 1;j<=l;j++){
		lca_util[i][j] = lca_util[lca_util[i][j - 1]][j - 1];
	}
	for(int e : adj[i]){
		if(e != p){
			dfs(e,i);
		}	
	}
	tout[i] = ++timer;
}
bool is_ancestor(int i,int j){
	return (tin[i] <= tin[j] && tout[i] >= tin[j]);
}
int lca(int u, int v){
    if (is_ancestor(u, v))
        return u;
    if (is_ancestor(v, u))
        return v;
    for (int i = l; i >= 0; --i) {
        if (!is_ancestor(lca_util[u][i], v))
            u = lca_util[u][i];
    }
    return lca_util[u][0];
}
void dfs2(int i,int p){
	for(int e : adj[i]){
		if(e != p){
			dist[e] = dist[i] + 1;
			dfs2(e,i);
			ans[i] += ans[e];
		}
	}
}
signed main(){
	iostream::sync_with_stdio(false);
	cin.tie(nullptr);
	cin >> n >> m >> k;
	l = ceil(log2(n)) + 1;
	for(int i = 0;i<n-1;i++){
		int a,b;cin >> a >> b;
		a--;b--;
		edges.push_back({a,b});
		adj[a].push_back(b);
		adj[b].push_back(a);
	}
	dfs(0,0);
	for(int __ = 0;__ < m;__++){
		int siz;cin >> siz;
		vector<int> vec(siz);
		for(int &e : vec){
			cin >> e;
			e--;
		}
		sort(vec.begin(),vec.end(),[&](int i,int j){
			return tin[i] < tin[j];
		});
		for(int i = 0;i<vec.size();i++){
			int ll = lca(vec[i], vec[(i + 1)%siz]);
			// cout << vec[i] << " " << vec[(i + 1)%siz] << " " << ll << "\n";
			ans[vec[i]]++;
			ans[vec[(i + 1)%siz]]++;
			ans[ll] -= 2;
		}
	}
	dist[0] = 0;
	dfs2(0,0);
	// for(int i = 0;i<n;i++)
	// 	cout << ans[i] << " ";
	// cout << "\n";
	vector<int> temp;
	for(int i = 0;i<n - 1;i++){
		int asd = edges[i].first;
		if(dist[asd] < dist[edges[i].second])
			asd =edges[i].second;
		if(ans[asd] >= 2*k)
			temp.push_back(i);
	}
	cout << temp.size() << "\n";
	for(int &e : temp)
		cout << e + 1 << " ";
	cout << "\n";
}

Compilation message

railway.cpp: In function 'int main()':
railway.cpp:71:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |   for(int i = 0;i<vec.size();i++){
      |                 ~^~~~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 6 ms 4332 KB Output is correct
3 Correct 8 ms 4300 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 7 ms 4812 KB Output is correct
7 Correct 6 ms 4428 KB Output is correct
8 Correct 5 ms 4300 KB Output is correct
9 Correct 5 ms 4300 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 1 ms 2636 KB Output is correct
12 Correct 1 ms 2636 KB Output is correct
13 Correct 2 ms 2672 KB Output is correct
14 Correct 1 ms 2636 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 6 ms 4332 KB Output is correct
3 Correct 8 ms 4300 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 7 ms 4812 KB Output is correct
7 Correct 6 ms 4428 KB Output is correct
8 Correct 5 ms 4300 KB Output is correct
9 Correct 5 ms 4300 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 1 ms 2636 KB Output is correct
12 Correct 1 ms 2636 KB Output is correct
13 Correct 2 ms 2672 KB Output is correct
14 Correct 1 ms 2636 KB Output is correct
15 Correct 20 ms 4684 KB Output is correct
16 Correct 24 ms 4720 KB Output is correct
17 Correct 21 ms 4768 KB Output is correct
18 Correct 8 ms 4812 KB Output is correct
19 Correct 6 ms 4392 KB Output is correct
20 Correct 26 ms 4932 KB Output is correct
21 Correct 28 ms 4756 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 6 ms 4348 KB Output is correct
24 Correct 5 ms 4336 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2668 KB Output is correct
27 Correct 10 ms 4732 KB Output is correct
28 Correct 8 ms 4344 KB Output is correct
29 Correct 6 ms 4300 KB Output is correct
30 Correct 5 ms 4332 KB Output is correct
31 Correct 1 ms 2652 KB Output is correct
32 Correct 2 ms 2652 KB Output is correct
33 Correct 1 ms 2644 KB Output is correct
34 Correct 1 ms 2636 KB Output is correct
35 Correct 1 ms 2664 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 66 ms 27552 KB Output is correct
2 Correct 2 ms 2656 KB Output is correct
3 Correct 69 ms 28640 KB Output is correct
4 Correct 61 ms 28156 KB Output is correct
5 Correct 59 ms 29224 KB Output is correct
6 Correct 63 ms 29624 KB Output is correct

Subtask #4
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 81 ms 22328 KB Output is correct
2 Correct 93 ms 20548 KB Output is correct
3 Correct 88 ms 20196 KB Output is correct
4 Correct 88 ms 20196 KB Output is correct
5 Correct 108 ms 20152 KB Output is correct
6 Correct 79 ms 24208 KB Output is correct
7 Correct 69 ms 24084 KB Output is correct

Subtask #5
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 81 ms 22328 KB Output is correct
2 Correct 93 ms 20548 KB Output is correct
3 Correct 88 ms 20196 KB Output is correct
4 Correct 88 ms 20196 KB Output is correct
5 Correct 108 ms 20152 KB Output is correct
6 Correct 79 ms 24208 KB Output is correct
7 Correct 69 ms 24084 KB Output is correct
8 Correct 110 ms 24208 KB Output is correct
9 Correct 93 ms 24248 KB Output is correct
10 Correct 57 ms 29228 KB Output is correct
11 Correct 64 ms 29220 KB Output is correct
12 Correct 73 ms 20028 KB Output is correct
13 Correct 74 ms 20020 KB Output is correct
14 Correct 88 ms 20044 KB Output is correct
15 Correct 93 ms 20068 KB Output is correct
16 Correct 89 ms 20124 KB Output is correct
17 Correct 107 ms 20204 KB Output is correct
18 Correct 97 ms 20184 KB Output is correct
19 Correct 89 ms 20536 KB Output is correct
20 Correct 71 ms 24444 KB Output is correct
21 Correct 71 ms 24556 KB Output is correct
22 Correct 72 ms 24344 KB Output is correct

Subtask #6
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 6 ms 4332 KB Output is correct
3 Correct 8 ms 4300 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 7 ms 4812 KB Output is correct
7 Correct 6 ms 4428 KB Output is correct
8 Correct 5 ms 4300 KB Output is correct
9 Correct 5 ms 4300 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 1 ms 2636 KB Output is correct
12 Correct 1 ms 2636 KB Output is correct
13 Correct 2 ms 2672 KB Output is correct
14 Correct 1 ms 2636 KB Output is correct
15 Correct 20 ms 4684 KB Output is correct
16 Correct 24 ms 4720 KB Output is correct
17 Correct 21 ms 4768 KB Output is correct
18 Correct 8 ms 4812 KB Output is correct
19 Correct 6 ms 4392 KB Output is correct
20 Correct 26 ms 4932 KB Output is correct
21 Correct 28 ms 4756 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 6 ms 4348 KB Output is correct
24 Correct 5 ms 4336 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2668 KB Output is correct
27 Correct 10 ms 4732 KB Output is correct
28 Correct 8 ms 4344 KB Output is correct
29 Correct 6 ms 4300 KB Output is correct
30 Correct 5 ms 4332 KB Output is correct
31 Correct 1 ms 2652 KB Output is correct
32 Correct 2 ms 2652 KB Output is correct
33 Correct 1 ms 2644 KB Output is correct
34 Correct 1 ms 2636 KB Output is correct
35 Correct 1 ms 2664 KB Output is correct
36 Correct 66 ms 27552 KB Output is correct
37 Correct 2 ms 2656 KB Output is correct
38 Correct 69 ms 28640 KB Output is correct
39 Correct 61 ms 28156 KB Output is correct
40 Correct 59 ms 29224 KB Output is correct
41 Correct 63 ms 29624 KB Output is correct
42 Correct 81 ms 22328 KB Output is correct
43 Correct 93 ms 20548 KB Output is correct
44 Correct 88 ms 20196 KB Output is correct
45 Correct 88 ms 20196 KB Output is correct
46 Correct 108 ms 20152 KB Output is correct
47 Correct 79 ms 24208 KB Output is correct
48 Correct 69 ms 24084 KB Output is correct
49 Correct 110 ms 24208 KB Output is correct
50 Correct 93 ms 24248 KB Output is correct
51 Correct 57 ms 29228 KB Output is correct
52 Correct 64 ms 29220 KB Output is correct
53 Correct 73 ms 20028 KB Output is correct
54 Correct 74 ms 20020 KB Output is correct
55 Correct 88 ms 20044 KB Output is correct
56 Correct 93 ms 20068 KB Output is correct
57 Correct 89 ms 20124 KB Output is correct
58 Correct 107 ms 20204 KB Output is correct
59 Correct 97 ms 20184 KB Output is correct
60 Correct 89 ms 20536 KB Output is correct
61 Correct 71 ms 24444 KB Output is correct
62 Correct 71 ms 24556 KB Output is correct
63 Correct 72 ms 24344 KB Output is correct
64 Correct 90 ms 24384 KB Output is correct
65 Correct 93 ms 20152 KB Output is correct
66 Correct 93 ms 20060 KB Output is correct
67 Correct 120 ms 20116 KB Output is correct
68 Correct 67 ms 19972 KB Output is correct
69 Correct 57 ms 19996 KB Output is correct
70 Correct 80 ms 24708 KB Output is correct
71 Correct 83 ms 23916 KB Output is correct
72 Correct 2 ms 2672 KB Output is correct
73 Correct 7 ms 4292 KB Output is correct
74 Correct 7 ms 4368 KB Output is correct
75 Correct 1 ms 2636 KB Output is correct
76 Correct 1 ms 2636 KB Output is correct
77 Correct 6 ms 4812 KB Output is correct
78 Correct 6 ms 4376 KB Output is correct
79 Correct 5 ms 4344 KB Output is correct
80 Correct 6 ms 4344 KB Output is correct
81 Correct 1 ms 2636 KB Output is correct
82 Correct 1 ms 2636 KB Output is correct
83 Correct 1 ms 2636 KB Output is correct
84 Correct 2 ms 2664 KB Output is correct
85 Correct 1 ms 2668 KB Output is correct
86 Correct 21 ms 4688 KB Output is correct
87 Correct 27 ms 4684 KB Output is correct
88 Correct 22 ms 4692 KB Output is correct
89 Correct 6 ms 4720 KB Output is correct
90 Correct 6 ms 4428 KB Output is correct
91 Correct 28 ms 4904 KB Output is correct
92 Correct 27 ms 4836 KB Output is correct
93 Correct 2 ms 2668 KB Output is correct
94 Correct 63 ms 29176 KB Output is correct
95 Correct 55 ms 28596 KB Output is correct
96 Correct 60 ms 27896 KB Output is correct
97 Correct 60 ms 29168 KB Output is correct
98 Correct 65 ms 29516 KB Output is correct
99 Correct 86 ms 20192 KB Output is correct
100 Correct 91 ms 20088 KB Output is correct
101 Correct 101 ms 20192 KB Output is correct
102 Correct 84 ms 20536 KB Output is correct
103 Correct 73 ms 24068 KB Output is correct
104 Correct 70 ms 24544 KB Output is correct
105 Correct 72 ms 24020 KB Output is correct
106 Correct 78 ms 24272 KB Output is correct
107 Correct 100 ms 24136 KB Output is correct
108 Correct 62 ms 29300 KB Output is correct
109 Correct 63 ms 29280 KB Output is correct
110 Correct 77 ms 20100 KB Output is correct
111 Correct 73 ms 20032 KB Output is correct
112 Correct 91 ms 20136 KB Output is correct
113 Correct 85 ms 20272 KB Output is correct