oj.uz

Submission #163207

# Submission time Handle Problem Language Result Execution time Memory
163207 2019-11-11T18:08:52 Z Minnakhmetov Railway (BOI17_railway) C++14
100 / 100
 149 ms 23852 KB 
#include <bits/stdc++.h>
    
#define ll long long
#define all(aaa) aaa.begin(), aaa.end()
 
using namespace std;

struct E {
	int to, i;
};

const int N = 1e5 + 5, L = 19;
int tin[N], tout[N], p[N][L], w[N];
int n, m, k, timer = 0;
vector<E> g[N];
vector<int> ans;

void dfs(int node) {
	tin[node] = ++timer;
	for (int i = 1; i < L; i++) {
		p[node][i] = p[p[node][i - 1]][i - 1];
	}
	for (E e : g[node]) {
		if (e.to != p[node][0]) {
			p[e.to][0] = node;
			dfs(e.to);
		}
	}
	tout[node] = timer;
}

void dive(int node) {
	for (E e : g[node]) {
		if (e.to != p[node][0]) {
			dive(e.to);
			if (w[e.to] >= k)
				ans.push_back(e.i);
			w[node] += w[e.to];
		}
	}
}

bool upper(int a, int b) {
	return tin[a] <= tin[b] && tout[a] >= tout[b];
}

int getLca(int a, int b) {
	if (upper(a, b))
		return a;
	for (int i = L - 1; i >= 0; i--) {
		if (!upper(p[a][i], b))
			a = p[a][i];
	}
	return p[a][0];
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);

    cin >> n >> m >> k;

    for (int i = 0; i < n - 1; i++) {
    	int a, b;
    	cin >> a >> b;
    	a--, b--;
    	g[a].push_back({b, i});
    	g[b].push_back({a, i});
    }

    dfs(0);

    for (int i = 0; i < m; i++) {
    	int s;
    	cin >> s;

    	vector<int> v;

    	for (int j = 0; j < s; j++) {
    		int x;
    		cin >> x;
    		v.push_back(x - 1);
    	}

    	sort(all(v), [](int x, int y) {
    		return tin[x] < tin[y];
    	});

    	for (int j = 0; j < v.size(); j++) {
    		int h = (j + 1 == v.size() ? 0 : j + 1),
    			lca = getLca(v[j], v[h]);
    		w[v[j]]++;
    		w[lca]--;
    	}
    }

    dive(0);

    cout << ans.size() << "\n";

    sort(all(ans));
    for (int x : ans)
    	cout << x + 1 << " ";

    return 0;
}

Compilation message

railway.cpp: In function 'int main()':
railway.cpp:89:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for (int j = 0; j < v.size(); j++) {
                      ~~^~~~~~~~~~
railway.cpp:90:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       int h = (j + 1 == v.size() ? 0 : j + 1),
                ~~~~~~^~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 10 ms 4088 KB Output is correct
3 Correct 30 ms 4088 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 11 ms 4472 KB Output is correct
7 Correct 11 ms 4052 KB Output is correct
8 Correct 9 ms 4088 KB Output is correct
9 Correct 9 ms 4088 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 7 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 8 ms 2808 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 10 ms 4088 KB Output is correct
3 Correct 30 ms 4088 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 11 ms 4472 KB Output is correct
7 Correct 11 ms 4052 KB Output is correct
8 Correct 9 ms 4088 KB Output is correct
9 Correct 9 ms 4088 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 7 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 8 ms 2808 KB Output is correct
15 Correct 30 ms 4472 KB Output is correct
16 Correct 34 ms 4472 KB Output is correct
17 Correct 33 ms 4472 KB Output is correct
18 Correct 12 ms 4472 KB Output is correct
19 Correct 11 ms 4088 KB Output is correct
20 Correct 37 ms 4728 KB Output is correct
21 Correct 40 ms 4520 KB Output is correct
22 Correct 4 ms 2680 KB Output is correct
23 Correct 11 ms 4088 KB Output is correct
24 Correct 11 ms 4092 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 11 ms 4472 KB Output is correct
28 Correct 10 ms 4088 KB Output is correct
29 Correct 9 ms 4088 KB Output is correct
30 Correct 10 ms 4088 KB Output is correct
31 Correct 5 ms 2680 KB Output is correct
32 Correct 4 ms 2680 KB Output is correct
33 Correct 4 ms 2680 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 4 ms 2680 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 143 ms 23536 KB Output is correct
2 Correct 4 ms 2684 KB Output is correct
3 Correct 131 ms 23156 KB Output is correct
4 Correct 124 ms 22536 KB Output is correct
5 Correct 94 ms 23408 KB Output is correct
6 Correct 97 ms 23788 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 19960 KB Output is correct
2 Correct 123 ms 17144 KB Output is correct
3 Correct 135 ms 16968 KB Output is correct
4 Correct 130 ms 16824 KB Output is correct
5 Correct 136 ms 17000 KB Output is correct
6 Correct 114 ms 20096 KB Output is correct
7 Correct 145 ms 19960 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 19960 KB Output is correct
2 Correct 123 ms 17144 KB Output is correct
3 Correct 135 ms 16968 KB Output is correct
4 Correct 130 ms 16824 KB Output is correct
5 Correct 136 ms 17000 KB Output is correct
6 Correct 114 ms 20096 KB Output is correct
7 Correct 145 ms 19960 KB Output is correct
8 Correct 122 ms 20012 KB Output is correct
9 Correct 123 ms 20020 KB Output is correct
10 Correct 89 ms 23536 KB Output is correct
11 Correct 89 ms 23508 KB Output is correct
12 Correct 101 ms 16632 KB Output is correct
13 Correct 105 ms 16632 KB Output is correct
14 Correct 133 ms 16780 KB Output is correct
15 Correct 133 ms 16764 KB Output is correct
16 Correct 134 ms 16988 KB Output is correct
17 Correct 130 ms 16964 KB Output is correct
18 Correct 119 ms 16860 KB Output is correct
19 Correct 121 ms 17076 KB Output is correct
20 Correct 125 ms 20260 KB Output is correct
21 Correct 118 ms 20312 KB Output is correct
22 Correct 117 ms 20400 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 10 ms 4088 KB Output is correct
3 Correct 30 ms 4088 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 11 ms 4472 KB Output is correct
7 Correct 11 ms 4052 KB Output is correct
8 Correct 9 ms 4088 KB Output is correct
9 Correct 9 ms 4088 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 7 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 8 ms 2808 KB Output is correct
15 Correct 30 ms 4472 KB Output is correct
16 Correct 34 ms 4472 KB Output is correct
17 Correct 33 ms 4472 KB Output is correct
18 Correct 12 ms 4472 KB Output is correct
19 Correct 11 ms 4088 KB Output is correct
20 Correct 37 ms 4728 KB Output is correct
21 Correct 40 ms 4520 KB Output is correct
22 Correct 4 ms 2680 KB Output is correct
23 Correct 11 ms 4088 KB Output is correct
24 Correct 11 ms 4092 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 11 ms 4472 KB Output is correct
28 Correct 10 ms 4088 KB Output is correct
29 Correct 9 ms 4088 KB Output is correct
30 Correct 10 ms 4088 KB Output is correct
31 Correct 5 ms 2680 KB Output is correct
32 Correct 4 ms 2680 KB Output is correct
33 Correct 4 ms 2680 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 4 ms 2680 KB Output is correct
36 Correct 143 ms 23536 KB Output is correct
37 Correct 4 ms 2684 KB Output is correct
38 Correct 131 ms 23156 KB Output is correct
39 Correct 124 ms 22536 KB Output is correct
40 Correct 94 ms 23408 KB Output is correct
41 Correct 97 ms 23788 KB Output is correct
42 Correct 103 ms 19960 KB Output is correct
43 Correct 123 ms 17144 KB Output is correct
44 Correct 135 ms 16968 KB Output is correct
45 Correct 130 ms 16824 KB Output is correct
46 Correct 136 ms 17000 KB Output is correct
47 Correct 114 ms 20096 KB Output is correct
48 Correct 145 ms 19960 KB Output is correct
49 Correct 122 ms 20012 KB Output is correct
50 Correct 123 ms 20020 KB Output is correct
51 Correct 89 ms 23536 KB Output is correct
52 Correct 89 ms 23508 KB Output is correct
53 Correct 101 ms 16632 KB Output is correct
54 Correct 105 ms 16632 KB Output is correct
55 Correct 133 ms 16780 KB Output is correct
56 Correct 133 ms 16764 KB Output is correct
57 Correct 134 ms 16988 KB Output is correct
58 Correct 130 ms 16964 KB Output is correct
59 Correct 119 ms 16860 KB Output is correct
60 Correct 121 ms 17076 KB Output is correct
61 Correct 125 ms 20260 KB Output is correct
62 Correct 118 ms 20312 KB Output is correct
63 Correct 117 ms 20400 KB Output is correct
64 Correct 123 ms 20264 KB Output is correct
65 Correct 133 ms 16896 KB Output is correct
66 Correct 149 ms 16976 KB Output is correct
67 Correct 127 ms 16760 KB Output is correct
68 Correct 93 ms 16632 KB Output is correct
69 Correct 91 ms 16504 KB Output is correct
70 Correct 133 ms 20516 KB Output is correct
71 Correct 117 ms 19828 KB Output is correct
72 Correct 4 ms 2680 KB Output is correct
73 Correct 11 ms 4088 KB Output is correct
74 Correct 10 ms 4088 KB Output is correct
75 Correct 4 ms 2680 KB Output is correct
76 Correct 4 ms 2680 KB Output is correct
77 Correct 33 ms 4392 KB Output is correct
78 Correct 11 ms 4088 KB Output is correct
79 Correct 9 ms 4088 KB Output is correct
80 Correct 10 ms 4020 KB Output is correct
81 Correct 5 ms 2680 KB Output is correct
82 Correct 4 ms 2680 KB Output is correct
83 Correct 4 ms 2680 KB Output is correct
84 Correct 4 ms 2680 KB Output is correct
85 Correct 4 ms 2680 KB Output is correct
86 Correct 31 ms 4472 KB Output is correct
87 Correct 31 ms 4472 KB Output is correct
88 Correct 32 ms 4472 KB Output is correct
89 Correct 11 ms 4408 KB Output is correct
90 Correct 11 ms 4088 KB Output is correct
91 Correct 37 ms 4600 KB Output is correct
92 Correct 41 ms 4600 KB Output is correct
93 Correct 4 ms 2680 KB Output is correct
94 Correct 134 ms 23408 KB Output is correct
95 Correct 128 ms 23156 KB Output is correct
96 Correct 131 ms 22556 KB Output is correct
97 Correct 93 ms 23412 KB Output is correct
98 Correct 94 ms 23852 KB Output is correct
99 Correct 124 ms 16792 KB Output is correct
100 Correct 122 ms 16888 KB Output is correct
101 Correct 127 ms 16968 KB Output is correct
102 Correct 116 ms 17120 KB Output is correct
103 Correct 113 ms 19960 KB Output is correct
104 Correct 113 ms 20344 KB Output is correct
105 Correct 105 ms 19944 KB Output is correct
106 Correct 120 ms 20328 KB Output is correct
107 Correct 117 ms 19956 KB Output is correct
108 Correct 89 ms 23536 KB Output is correct
109 Correct 89 ms 23512 KB Output is correct
110 Correct 92 ms 16696 KB Output is correct
111 Correct 96 ms 16708 KB Output is correct
112 Correct 124 ms 16824 KB Output is correct
113 Correct 122 ms 16960 KB Output is correct