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Submission #884774

# Submission time Handle Problem Language Result Execution time Memory
884774 2023-12-08T11:59:39 Z arashMLG Railway (BOI17_railway) C++17
100 / 100
 90 ms 25036 KB 
#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...) 69
#endif
using namespace std;

typedef long long     ll;
typedef pair<int,int> pii;

const int N = 1e5 + 23;
const int LOG = 23;
const ll inf = 1e18;

#define F           first
#define S           second
#define pb          push_back
#define kill(x)     cout<<x<<endl, exit(0);
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define lc          (v << 1)
#define rc          ((v<<1) |1)

int n,m,k;
vector<pii> G[N];
int dp[N];
int up[LOG][N];
int h[N];
int st[N],timer =0;

void dfsset(int v,int p = 1) {
	up[0][v] = p;
	st[v] = timer ++;
	for(int i = 1; i < LOG; i ++) {
		up[i][v] = up[i-1][up[i-1][v]];
	}
	for(auto [u,_] : G[v]) if(u != p) {
		h[u] = h[v] + 1;
		dfsset(u,v);
	}
}

int getPar(int v,int sex) {
	for(int i = 0 ;i < LOG ; i ++) 
		if((sex>>i)&1)
			v = up[i][v];
	return v;
}

int lca(int v,int u) {
	if(h[v] < h[u]) swap(v,u);
	v= getPar(v,h[v]-h[u]);
	if(v == u) return v;
	for(int i = LOG-1;i >=0 ; i --) 
		if(up[i][v] != up[i][u])
			v = up[i][v],u = up[i][u];
	return up[0][v];
}

vector<int> ans;

void dfs(int v,int p = -1,int wid=-1) {
	for(auto [u,_] : G[v]) if(u != p) {
		dfs(u,v,_);
		dp[v] += dp[u];
	}
	if(wid != -1 && dp[v]/2 >= k) {
		ans.pb(wid);
	}
}

vector<int> sex;

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
	cin>>n>>m>>k;
	for(int i =1; i < n ; i ++) {
		int v,u; cin>>v>>u;
		G[v].pb({u,i});
		G[u].pb({v,i});
	}
	dfsset(1);
	while(m--) {
		sex.clear();
		int s; cin>>s;
		for(int i = 0; i < s; i++) {
			int x; cin>>x;
			sex.pb(x);
		}
		sort(all(sex), [&] (int x,int y) {return st[x] < st[y];});
		for(int i = 1; i < s; i ++) {
			int v = sex[i-1],u =sex[i];
			dp[v] ++,dp[u] ++;
			dp[lca(v,u)] -= 2;
		}
		dp[sex[0]] ++,dp[sex[s-1]] ++;
		dp[lca(sex[0],sex[s-1])] -= 2;
	}
	dfs(1);
	sort(all(ans));
	cout<<sz(ans) << '\n';
	for(int x : ans) cout<<x << ' ';
	return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 4 ms 13148 KB Output is correct
3 Correct 5 ms 13148 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 5 ms 13524 KB Output is correct
7 Correct 5 ms 13400 KB Output is correct
8 Correct 4 ms 13240 KB Output is correct
9 Correct 5 ms 13144 KB Output is correct
10 Correct 2 ms 12632 KB Output is correct
11 Correct 2 ms 12636 KB Output is correct
12 Correct 2 ms 12636 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 2 ms 12636 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 4 ms 13148 KB Output is correct
3 Correct 5 ms 13148 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 5 ms 13524 KB Output is correct
7 Correct 5 ms 13400 KB Output is correct
8 Correct 4 ms 13240 KB Output is correct
9 Correct 5 ms 13144 KB Output is correct
10 Correct 2 ms 12632 KB Output is correct
11 Correct 2 ms 12636 KB Output is correct
12 Correct 2 ms 12636 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 2 ms 12636 KB Output is correct
15 Correct 19 ms 13148 KB Output is correct
16 Correct 16 ms 13148 KB Output is correct
17 Correct 20 ms 13232 KB Output is correct
18 Correct 5 ms 13656 KB Output is correct
19 Correct 5 ms 13148 KB Output is correct
20 Correct 21 ms 13328 KB Output is correct
21 Correct 17 ms 13148 KB Output is correct
22 Correct 2 ms 12884 KB Output is correct
23 Correct 4 ms 13144 KB Output is correct
24 Correct 5 ms 13148 KB Output is correct
25 Correct 2 ms 12636 KB Output is correct
26 Correct 2 ms 12800 KB Output is correct
27 Correct 5 ms 13912 KB Output is correct
28 Correct 5 ms 13148 KB Output is correct
29 Correct 4 ms 13148 KB Output is correct
30 Correct 5 ms 13148 KB Output is correct
31 Correct 2 ms 12636 KB Output is correct
32 Correct 2 ms 12636 KB Output is correct
33 Correct 2 ms 12636 KB Output is correct
34 Correct 3 ms 12636 KB Output is correct
35 Correct 2 ms 12636 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 24780 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 62 ms 24272 KB Output is correct
4 Correct 52 ms 23884 KB Output is correct
5 Correct 55 ms 24776 KB Output is correct
6 Correct 53 ms 24776 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 20472 KB Output is correct
2 Correct 63 ms 16984 KB Output is correct
3 Correct 71 ms 16712 KB Output is correct
4 Correct 62 ms 16708 KB Output is correct
5 Correct 60 ms 16476 KB Output is correct
6 Correct 46 ms 20564 KB Output is correct
7 Correct 54 ms 20376 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 20472 KB Output is correct
2 Correct 63 ms 16984 KB Output is correct
3 Correct 71 ms 16712 KB Output is correct
4 Correct 62 ms 16708 KB Output is correct
5 Correct 60 ms 16476 KB Output is correct
6 Correct 46 ms 20564 KB Output is correct
7 Correct 54 ms 20376 KB Output is correct
8 Correct 54 ms 20564 KB Output is correct
9 Correct 53 ms 20564 KB Output is correct
10 Correct 54 ms 24780 KB Output is correct
11 Correct 53 ms 24936 KB Output is correct
12 Correct 61 ms 16984 KB Output is correct
13 Correct 41 ms 16728 KB Output is correct
14 Correct 66 ms 16728 KB Output is correct
15 Correct 76 ms 16732 KB Output is correct
16 Correct 74 ms 16464 KB Output is correct
17 Correct 71 ms 16704 KB Output is correct
18 Correct 54 ms 16476 KB Output is correct
19 Correct 67 ms 17016 KB Output is correct
20 Correct 67 ms 20732 KB Output is correct
21 Correct 50 ms 20848 KB Output is correct
22 Correct 52 ms 20816 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 4 ms 13148 KB Output is correct
3 Correct 5 ms 13148 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 5 ms 13524 KB Output is correct
7 Correct 5 ms 13400 KB Output is correct
8 Correct 4 ms 13240 KB Output is correct
9 Correct 5 ms 13144 KB Output is correct
10 Correct 2 ms 12632 KB Output is correct
11 Correct 2 ms 12636 KB Output is correct
12 Correct 2 ms 12636 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 2 ms 12636 KB Output is correct
15 Correct 19 ms 13148 KB Output is correct
16 Correct 16 ms 13148 KB Output is correct
17 Correct 20 ms 13232 KB Output is correct
18 Correct 5 ms 13656 KB Output is correct
19 Correct 5 ms 13148 KB Output is correct
20 Correct 21 ms 13328 KB Output is correct
21 Correct 17 ms 13148 KB Output is correct
22 Correct 2 ms 12884 KB Output is correct
23 Correct 4 ms 13144 KB Output is correct
24 Correct 5 ms 13148 KB Output is correct
25 Correct 2 ms 12636 KB Output is correct
26 Correct 2 ms 12800 KB Output is correct
27 Correct 5 ms 13912 KB Output is correct
28 Correct 5 ms 13148 KB Output is correct
29 Correct 4 ms 13148 KB Output is correct
30 Correct 5 ms 13148 KB Output is correct
31 Correct 2 ms 12636 KB Output is correct
32 Correct 2 ms 12636 KB Output is correct
33 Correct 2 ms 12636 KB Output is correct
34 Correct 3 ms 12636 KB Output is correct
35 Correct 2 ms 12636 KB Output is correct
36 Correct 56 ms 24780 KB Output is correct
37 Correct 2 ms 12636 KB Output is correct
38 Correct 62 ms 24272 KB Output is correct
39 Correct 52 ms 23884 KB Output is correct
40 Correct 55 ms 24776 KB Output is correct
41 Correct 53 ms 24776 KB Output is correct
42 Correct 50 ms 20472 KB Output is correct
43 Correct 63 ms 16984 KB Output is correct
44 Correct 71 ms 16712 KB Output is correct
45 Correct 62 ms 16708 KB Output is correct
46 Correct 60 ms 16476 KB Output is correct
47 Correct 46 ms 20564 KB Output is correct
48 Correct 54 ms 20376 KB Output is correct
49 Correct 54 ms 20564 KB Output is correct
50 Correct 53 ms 20564 KB Output is correct
51 Correct 54 ms 24780 KB Output is correct
52 Correct 53 ms 24936 KB Output is correct
53 Correct 61 ms 16984 KB Output is correct
54 Correct 41 ms 16728 KB Output is correct
55 Correct 66 ms 16728 KB Output is correct
56 Correct 76 ms 16732 KB Output is correct
57 Correct 74 ms 16464 KB Output is correct
58 Correct 71 ms 16704 KB Output is correct
59 Correct 54 ms 16476 KB Output is correct
60 Correct 67 ms 17016 KB Output is correct
61 Correct 67 ms 20732 KB Output is correct
62 Correct 50 ms 20848 KB Output is correct
63 Correct 52 ms 20816 KB Output is correct
64 Correct 56 ms 20564 KB Output is correct
65 Correct 71 ms 16476 KB Output is correct
66 Correct 64 ms 16700 KB Output is correct
67 Correct 90 ms 16732 KB Output is correct
68 Correct 44 ms 16984 KB Output is correct
69 Correct 40 ms 16984 KB Output is correct
70 Correct 57 ms 20944 KB Output is correct
71 Correct 52 ms 20472 KB Output is correct
72 Correct 2 ms 12632 KB Output is correct
73 Correct 5 ms 13144 KB Output is correct
74 Correct 5 ms 13188 KB Output is correct
75 Correct 2 ms 12636 KB Output is correct
76 Correct 2 ms 12636 KB Output is correct
77 Correct 7 ms 13660 KB Output is correct
78 Correct 5 ms 13148 KB Output is correct
79 Correct 4 ms 13148 KB Output is correct
80 Correct 5 ms 13148 KB Output is correct
81 Correct 2 ms 12636 KB Output is correct
82 Correct 2 ms 12636 KB Output is correct
83 Correct 2 ms 12636 KB Output is correct
84 Correct 2 ms 12636 KB Output is correct
85 Correct 2 ms 12636 KB Output is correct
86 Correct 16 ms 13148 KB Output is correct
87 Correct 16 ms 13148 KB Output is correct
88 Correct 16 ms 13144 KB Output is correct
89 Correct 5 ms 13404 KB Output is correct
90 Correct 7 ms 13288 KB Output is correct
91 Correct 16 ms 13264 KB Output is correct
92 Correct 17 ms 13148 KB Output is correct
93 Correct 2 ms 12636 KB Output is correct
94 Correct 56 ms 24784 KB Output is correct
95 Correct 54 ms 24496 KB Output is correct
96 Correct 61 ms 23892 KB Output is correct
97 Correct 56 ms 24776 KB Output is correct
98 Correct 56 ms 24772 KB Output is correct
99 Correct 57 ms 16476 KB Output is correct
100 Correct 65 ms 16472 KB Output is correct
101 Correct 56 ms 16476 KB Output is correct
102 Correct 55 ms 17036 KB Output is correct
103 Correct 48 ms 20748 KB Output is correct
104 Correct 51 ms 20848 KB Output is correct
105 Correct 48 ms 20488 KB Output is correct
106 Correct 54 ms 20736 KB Output is correct
107 Correct 52 ms 20476 KB Output is correct
108 Correct 52 ms 24796 KB Output is correct
109 Correct 59 ms 25036 KB Output is correct
110 Correct 50 ms 16732 KB Output is correct
111 Correct 41 ms 16728 KB Output is correct
112 Correct 66 ms 16472 KB Output is correct
113 Correct 58 ms 16476 KB Output is correct