#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in pair<int, int>
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define MX (int)3e5+5
#define LOGM (int)18
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
vector<int> adj[MX];
vector<in> edges;
int pa[LOGM][MX];
int tin[MX];
int tout[MX];
int focus[MX];
int timer = 0;
int label[MX];
void dfs(int u, int p)
{
pa[0][u] = p;
tin[u] = ++timer;
for(int v: adj[u])
{
if(v==p)
continue;
dfs(v, u);
}
tout[u] = timer;
return;
}
int lca(int u, int v)
{
if(tin[u] > tin[v])
swap(u, v);
if((tout[u] >= tout[v]))
return u;
for(int i = LOGM-1; i >= 0; i--)
{
if(tout[pa[i][u]] < tout[v])
u = pa[i][u];
}
return pa[0][u];
}
void dfs2(int u, int p)
{
for(int v: adj[u])
{
if(v==p)
continue;
dfs2(v, u);
focus[u]+=focus[v];
}
return;
}
signed main()
{
fast();
int n, q, k;
cin >> n >> q >> k;
int m = n-1;
while(m--)
{
int u, v;
cin >> u >> v;
adj[u].pb(v);
adj[v].pb(u);
edges.pb({u, v});
}
dfs(1, 0);
int curr = 0;
for(auto [x, y]: edges)
{
if(tin[x] >= tin[y])
swap(x, y);
label[y] = ++curr;
}
pa[0][0] = 0;
tout[0] = INF;
for(int i = 1; i < LOGM; i++)
{
for(int j = 0; j <= n; j++)
pa[i][j] = pa[i-1][pa[i-1][j]];
}
while(q--)
{
int M;
cin >> M;
vector<in> v;
for(int QoIGn = 1; QoIGn <= M; QoIGn++)
{
int u;
cin >> u;
focus[u]++;
v.pb({tin[u], u});
}
sort(v.begin(), v.end());
for(int i = 0; i < v.size(); i++)
focus[lca(v[i].s, v[(i+1)%M].s)]--;
}
/*cout << "printign tin[u], tout[u]" << endl;
for(int u = 1; u <= n; u++)
{
printf("tin[%d] = %d, tout[%d] = %d", u, tin[u], u, tout[u]);
cout << endl;
}
cout << "printing lcas NIGELTS" << endl;
for(int i = 2; i <= n; i++)
{
for(int j = i+1; j <= n; j++)
{
printf("lca(%d, %d) = %d", i, j, lca(i, j));
cout << endl;
}
}*/
dfs2(1, 0);
int cnt = 0;
vector<int> DOFINQ;
for(int i = 2; i <= n; i++)
{
if(focus[i] >= k)
DOFINQ.pb(label[i]);
}
sort(DOFINQ.begin(), DOFINQ.end());
cout << DOFINQ.size() << "\n";
for(int ttt: DOFINQ)
cout << ttt << " ";
return 0;
}
Compilation message
railway.cpp: In function 'int main()':
railway.cpp:107:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
107 | for(int i = 0; i < v.size(); i++)
| ~~^~~~~~~~~~
railway.cpp:126:6: warning: unused variable 'cnt' [-Wunused-variable]
126 | int cnt = 0;
| ^~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
48728 KB |
Output is correct |
2 |
Correct |
12 ms |
49368 KB |
Output is correct |
3 |
Correct |
14 ms |
49368 KB |
Output is correct |
4 |
Correct |
9 ms |
48732 KB |
Output is correct |
5 |
Correct |
9 ms |
48732 KB |
Output is correct |
6 |
Correct |
14 ms |
49880 KB |
Output is correct |
7 |
Correct |
14 ms |
49624 KB |
Output is correct |
8 |
Correct |
13 ms |
49364 KB |
Output is correct |
9 |
Correct |
12 ms |
49496 KB |
Output is correct |
10 |
Correct |
9 ms |
48732 KB |
Output is correct |
11 |
Correct |
9 ms |
48732 KB |
Output is correct |
12 |
Correct |
9 ms |
48732 KB |
Output is correct |
13 |
Correct |
9 ms |
48732 KB |
Output is correct |
14 |
Correct |
9 ms |
48732 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
48728 KB |
Output is correct |
2 |
Correct |
12 ms |
49368 KB |
Output is correct |
3 |
Correct |
14 ms |
49368 KB |
Output is correct |
4 |
Correct |
9 ms |
48732 KB |
Output is correct |
5 |
Correct |
9 ms |
48732 KB |
Output is correct |
6 |
Correct |
14 ms |
49880 KB |
Output is correct |
7 |
Correct |
14 ms |
49624 KB |
Output is correct |
8 |
Correct |
13 ms |
49364 KB |
Output is correct |
9 |
Correct |
12 ms |
49496 KB |
Output is correct |
10 |
Correct |
9 ms |
48732 KB |
Output is correct |
11 |
Correct |
9 ms |
48732 KB |
Output is correct |
12 |
Correct |
9 ms |
48732 KB |
Output is correct |
13 |
Correct |
9 ms |
48732 KB |
Output is correct |
14 |
Correct |
9 ms |
48732 KB |
Output is correct |
15 |
Correct |
27 ms |
49816 KB |
Output is correct |
16 |
Correct |
27 ms |
49880 KB |
Output is correct |
17 |
Correct |
28 ms |
49868 KB |
Output is correct |
18 |
Correct |
13 ms |
49880 KB |
Output is correct |
19 |
Correct |
13 ms |
49392 KB |
Output is correct |
20 |
Correct |
32 ms |
49964 KB |
Output is correct |
21 |
Correct |
42 ms |
49876 KB |
Output is correct |
22 |
Correct |
9 ms |
48728 KB |
Output is correct |
23 |
Correct |
13 ms |
49368 KB |
Output is correct |
24 |
Correct |
13 ms |
49620 KB |
Output is correct |
25 |
Correct |
8 ms |
48652 KB |
Output is correct |
26 |
Correct |
10 ms |
48732 KB |
Output is correct |
27 |
Correct |
14 ms |
49876 KB |
Output is correct |
28 |
Correct |
14 ms |
49620 KB |
Output is correct |
29 |
Correct |
13 ms |
49500 KB |
Output is correct |
30 |
Correct |
13 ms |
49368 KB |
Output is correct |
31 |
Correct |
10 ms |
48700 KB |
Output is correct |
32 |
Correct |
8 ms |
48728 KB |
Output is correct |
33 |
Correct |
9 ms |
48564 KB |
Output is correct |
34 |
Correct |
9 ms |
48728 KB |
Output is correct |
35 |
Correct |
10 ms |
48732 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
58 ms |
66460 KB |
Output is correct |
2 |
Correct |
10 ms |
48728 KB |
Output is correct |
3 |
Correct |
54 ms |
65220 KB |
Output is correct |
4 |
Correct |
51 ms |
65420 KB |
Output is correct |
5 |
Correct |
56 ms |
67400 KB |
Output is correct |
6 |
Correct |
58 ms |
69472 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
52 ms |
62776 KB |
Output is correct |
2 |
Correct |
58 ms |
61440 KB |
Output is correct |
3 |
Correct |
68 ms |
61056 KB |
Output is correct |
4 |
Correct |
70 ms |
59720 KB |
Output is correct |
5 |
Correct |
83 ms |
61268 KB |
Output is correct |
6 |
Correct |
54 ms |
64784 KB |
Output is correct |
7 |
Correct |
53 ms |
63012 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
52 ms |
62776 KB |
Output is correct |
2 |
Correct |
58 ms |
61440 KB |
Output is correct |
3 |
Correct |
68 ms |
61056 KB |
Output is correct |
4 |
Correct |
70 ms |
59720 KB |
Output is correct |
5 |
Correct |
83 ms |
61268 KB |
Output is correct |
6 |
Correct |
54 ms |
64784 KB |
Output is correct |
7 |
Correct |
53 ms |
63012 KB |
Output is correct |
8 |
Correct |
88 ms |
62928 KB |
Output is correct |
9 |
Correct |
69 ms |
64444 KB |
Output is correct |
10 |
Correct |
55 ms |
67664 KB |
Output is correct |
11 |
Correct |
56 ms |
67520 KB |
Output is correct |
12 |
Correct |
138 ms |
61440 KB |
Output is correct |
13 |
Correct |
150 ms |
60076 KB |
Output is correct |
14 |
Correct |
71 ms |
60236 KB |
Output is correct |
15 |
Correct |
73 ms |
60224 KB |
Output is correct |
16 |
Correct |
82 ms |
60484 KB |
Output is correct |
17 |
Correct |
77 ms |
62016 KB |
Output is correct |
18 |
Correct |
64 ms |
62024 KB |
Output is correct |
19 |
Correct |
62 ms |
60604 KB |
Output is correct |
20 |
Correct |
54 ms |
65892 KB |
Output is correct |
21 |
Correct |
59 ms |
65892 KB |
Output is correct |
22 |
Correct |
57 ms |
65588 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
48728 KB |
Output is correct |
2 |
Correct |
12 ms |
49368 KB |
Output is correct |
3 |
Correct |
14 ms |
49368 KB |
Output is correct |
4 |
Correct |
9 ms |
48732 KB |
Output is correct |
5 |
Correct |
9 ms |
48732 KB |
Output is correct |
6 |
Correct |
14 ms |
49880 KB |
Output is correct |
7 |
Correct |
14 ms |
49624 KB |
Output is correct |
8 |
Correct |
13 ms |
49364 KB |
Output is correct |
9 |
Correct |
12 ms |
49496 KB |
Output is correct |
10 |
Correct |
9 ms |
48732 KB |
Output is correct |
11 |
Correct |
9 ms |
48732 KB |
Output is correct |
12 |
Correct |
9 ms |
48732 KB |
Output is correct |
13 |
Correct |
9 ms |
48732 KB |
Output is correct |
14 |
Correct |
9 ms |
48732 KB |
Output is correct |
15 |
Correct |
27 ms |
49816 KB |
Output is correct |
16 |
Correct |
27 ms |
49880 KB |
Output is correct |
17 |
Correct |
28 ms |
49868 KB |
Output is correct |
18 |
Correct |
13 ms |
49880 KB |
Output is correct |
19 |
Correct |
13 ms |
49392 KB |
Output is correct |
20 |
Correct |
32 ms |
49964 KB |
Output is correct |
21 |
Correct |
42 ms |
49876 KB |
Output is correct |
22 |
Correct |
9 ms |
48728 KB |
Output is correct |
23 |
Correct |
13 ms |
49368 KB |
Output is correct |
24 |
Correct |
13 ms |
49620 KB |
Output is correct |
25 |
Correct |
8 ms |
48652 KB |
Output is correct |
26 |
Correct |
10 ms |
48732 KB |
Output is correct |
27 |
Correct |
14 ms |
49876 KB |
Output is correct |
28 |
Correct |
14 ms |
49620 KB |
Output is correct |
29 |
Correct |
13 ms |
49500 KB |
Output is correct |
30 |
Correct |
13 ms |
49368 KB |
Output is correct |
31 |
Correct |
10 ms |
48700 KB |
Output is correct |
32 |
Correct |
8 ms |
48728 KB |
Output is correct |
33 |
Correct |
9 ms |
48564 KB |
Output is correct |
34 |
Correct |
9 ms |
48728 KB |
Output is correct |
35 |
Correct |
10 ms |
48732 KB |
Output is correct |
36 |
Correct |
58 ms |
66460 KB |
Output is correct |
37 |
Correct |
10 ms |
48728 KB |
Output is correct |
38 |
Correct |
54 ms |
65220 KB |
Output is correct |
39 |
Correct |
51 ms |
65420 KB |
Output is correct |
40 |
Correct |
56 ms |
67400 KB |
Output is correct |
41 |
Correct |
58 ms |
69472 KB |
Output is correct |
42 |
Correct |
52 ms |
62776 KB |
Output is correct |
43 |
Correct |
58 ms |
61440 KB |
Output is correct |
44 |
Correct |
68 ms |
61056 KB |
Output is correct |
45 |
Correct |
70 ms |
59720 KB |
Output is correct |
46 |
Correct |
83 ms |
61268 KB |
Output is correct |
47 |
Correct |
54 ms |
64784 KB |
Output is correct |
48 |
Correct |
53 ms |
63012 KB |
Output is correct |
49 |
Correct |
88 ms |
62928 KB |
Output is correct |
50 |
Correct |
69 ms |
64444 KB |
Output is correct |
51 |
Correct |
55 ms |
67664 KB |
Output is correct |
52 |
Correct |
56 ms |
67520 KB |
Output is correct |
53 |
Correct |
138 ms |
61440 KB |
Output is correct |
54 |
Correct |
150 ms |
60076 KB |
Output is correct |
55 |
Correct |
71 ms |
60236 KB |
Output is correct |
56 |
Correct |
73 ms |
60224 KB |
Output is correct |
57 |
Correct |
82 ms |
60484 KB |
Output is correct |
58 |
Correct |
77 ms |
62016 KB |
Output is correct |
59 |
Correct |
64 ms |
62024 KB |
Output is correct |
60 |
Correct |
62 ms |
60604 KB |
Output is correct |
61 |
Correct |
54 ms |
65892 KB |
Output is correct |
62 |
Correct |
59 ms |
65892 KB |
Output is correct |
63 |
Correct |
57 ms |
65588 KB |
Output is correct |
64 |
Correct |
71 ms |
66984 KB |
Output is correct |
65 |
Correct |
93 ms |
64984 KB |
Output is correct |
66 |
Correct |
91 ms |
63300 KB |
Output is correct |
67 |
Correct |
87 ms |
63296 KB |
Output is correct |
68 |
Correct |
117 ms |
63288 KB |
Output is correct |
69 |
Correct |
92 ms |
64576 KB |
Output is correct |
70 |
Correct |
69 ms |
67576 KB |
Output is correct |
71 |
Correct |
79 ms |
66448 KB |
Output is correct |
72 |
Correct |
9 ms |
48732 KB |
Output is correct |
73 |
Correct |
12 ms |
49436 KB |
Output is correct |
74 |
Correct |
13 ms |
49368 KB |
Output is correct |
75 |
Correct |
9 ms |
48724 KB |
Output is correct |
76 |
Correct |
8 ms |
48732 KB |
Output is correct |
77 |
Correct |
13 ms |
49880 KB |
Output is correct |
78 |
Correct |
14 ms |
49624 KB |
Output is correct |
79 |
Correct |
12 ms |
49368 KB |
Output is correct |
80 |
Correct |
13 ms |
49368 KB |
Output is correct |
81 |
Correct |
10 ms |
48732 KB |
Output is correct |
82 |
Correct |
9 ms |
48732 KB |
Output is correct |
83 |
Correct |
10 ms |
48988 KB |
Output is correct |
84 |
Correct |
9 ms |
48732 KB |
Output is correct |
85 |
Correct |
9 ms |
48728 KB |
Output is correct |
86 |
Correct |
27 ms |
49880 KB |
Output is correct |
87 |
Correct |
28 ms |
49876 KB |
Output is correct |
88 |
Correct |
27 ms |
49872 KB |
Output is correct |
89 |
Correct |
13 ms |
49880 KB |
Output is correct |
90 |
Correct |
13 ms |
49620 KB |
Output is correct |
91 |
Correct |
32 ms |
50012 KB |
Output is correct |
92 |
Correct |
35 ms |
49848 KB |
Output is correct |
93 |
Correct |
9 ms |
48744 KB |
Output is correct |
94 |
Correct |
57 ms |
72544 KB |
Output is correct |
95 |
Correct |
54 ms |
71612 KB |
Output is correct |
96 |
Correct |
52 ms |
69060 KB |
Output is correct |
97 |
Correct |
57 ms |
71360 KB |
Output is correct |
98 |
Correct |
60 ms |
73148 KB |
Output is correct |
99 |
Correct |
81 ms |
64844 KB |
Output is correct |
100 |
Correct |
70 ms |
64856 KB |
Output is correct |
101 |
Correct |
80 ms |
63500 KB |
Output is correct |
102 |
Correct |
60 ms |
63808 KB |
Output is correct |
103 |
Correct |
56 ms |
68028 KB |
Output is correct |
104 |
Correct |
69 ms |
68800 KB |
Output is correct |
105 |
Correct |
56 ms |
68032 KB |
Output is correct |
106 |
Correct |
71 ms |
68360 KB |
Output is correct |
107 |
Correct |
67 ms |
68032 KB |
Output is correct |
108 |
Correct |
64 ms |
72784 KB |
Output is correct |
109 |
Correct |
57 ms |
72872 KB |
Output is correct |
110 |
Correct |
117 ms |
64840 KB |
Output is correct |
111 |
Correct |
101 ms |
64580 KB |
Output is correct |
112 |
Correct |
77 ms |
64904 KB |
Output is correct |
113 |
Correct |
76 ms |
64832 KB |
Output is correct |