# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
751005 |
2023-05-30T19:01:39 Z |
sofija6 |
Railway (BOI17_railway) |
C++14 |
|
144 ms |
39000 KB |
#include <bits/stdc++.h>
#define ll long long
#define MAXN 100010
#define logn 18
using namespace std;
ll c[MAXN],t=2,up[MAXN][logn],in[MAXN],out[MAXN],k;
vector<pair<ll,ll> > G[MAXN];
vector<ll> ans;
void DFS(ll i,ll p)
{
in[i]=t;
t++;
up[i][0]=p;
for (ll j=1;j<logn;j++)
up[i][j]=up[up[i][j-1]][j-1];
for (auto next : G[i])
{
if (next.first!=p)
DFS(next.first,i);
}
out[i]=t;
t++;
}
bool Is_Ancestor(ll u,ll v)
{
return in[u]<=in[v] && out[u]>=out[v];
}
ll LCA(ll u,ll v)
{
if (Is_Ancestor(u,v))
return u;
if (Is_Ancestor(v,u))
return v;
for (ll i=logn-1;i>=0;i--)
{
if (!Is_Ancestor(up[u][i],v))
u=up[u][i];
}
return up[u][0];
}
bool Cmp(ll x,ll y)
{
return in[x]<in[y];
}
struct bit
{
vector<ll> v;
void Init()
{
v.resize(2*MAXN);
}
void Add(ll pos,ll val)
{
for (ll i=pos;i<2*MAXN;i+=i&(-i))
v[i]+=val;
}
ll Calc(ll pos)
{
ll cur=0;
for (ll i=pos;i>0;i-=i&(-i))
cur+=v[i];
return cur;
}
ll Query(ll l,ll r)
{
return Calc(r)-Calc(l-1);
}
};
bit B;
void DFS_Solve(ll i,ll p)
{
for (auto next : G[i])
{
if (next.first!=p)
{
if (B.Query(in[next.first],out[next.first])>=2*k)
ans.push_back(next.second);
DFS_Solve(next.first,i);
}
}
}
int main()
{
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
ll n,m,a,b,s;
cin >> n >> m >> k;
for (ll i=1;i<n;i++)
{
cin >> a >> b;
G[a].push_back({b,i});
G[b].push_back({a,i});
}
DFS(1,1);
B.Init();
for (ll i=1;i<=m;i++)
{
cin >> s;
for (ll j=1;j<=s;j++)
cin >> c[j];
sort(c+1,c+1+s,Cmp);
c[s+1]=c[1];
for (ll j=2;j<=s+1;j++)
{
ll l=LCA(c[j-1],c[j]);
B.Add(in[l],-2);
B.Add(in[c[j-1]],1);
B.Add(in[c[j]],1);
}
}
DFS_Solve(1,1);
sort(ans.begin(),ans.end());
cout << ans.size() << "\n";
for (ll i : ans)
cout << i << " ";
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4180 KB |
Output is correct |
2 |
Correct |
7 ms |
6356 KB |
Output is correct |
3 |
Correct |
7 ms |
6356 KB |
Output is correct |
4 |
Correct |
2 ms |
4180 KB |
Output is correct |
5 |
Correct |
3 ms |
4180 KB |
Output is correct |
6 |
Correct |
9 ms |
7084 KB |
Output is correct |
7 |
Correct |
9 ms |
6528 KB |
Output is correct |
8 |
Correct |
8 ms |
6484 KB |
Output is correct |
9 |
Correct |
8 ms |
6408 KB |
Output is correct |
10 |
Correct |
2 ms |
4212 KB |
Output is correct |
11 |
Correct |
3 ms |
4180 KB |
Output is correct |
12 |
Correct |
2 ms |
4180 KB |
Output is correct |
13 |
Correct |
3 ms |
4180 KB |
Output is correct |
14 |
Correct |
2 ms |
4180 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4180 KB |
Output is correct |
2 |
Correct |
7 ms |
6356 KB |
Output is correct |
3 |
Correct |
7 ms |
6356 KB |
Output is correct |
4 |
Correct |
2 ms |
4180 KB |
Output is correct |
5 |
Correct |
3 ms |
4180 KB |
Output is correct |
6 |
Correct |
9 ms |
7084 KB |
Output is correct |
7 |
Correct |
9 ms |
6528 KB |
Output is correct |
8 |
Correct |
8 ms |
6484 KB |
Output is correct |
9 |
Correct |
8 ms |
6408 KB |
Output is correct |
10 |
Correct |
2 ms |
4212 KB |
Output is correct |
11 |
Correct |
3 ms |
4180 KB |
Output is correct |
12 |
Correct |
2 ms |
4180 KB |
Output is correct |
13 |
Correct |
3 ms |
4180 KB |
Output is correct |
14 |
Correct |
2 ms |
4180 KB |
Output is correct |
15 |
Correct |
31 ms |
6884 KB |
Output is correct |
16 |
Correct |
26 ms |
6812 KB |
Output is correct |
17 |
Correct |
27 ms |
6932 KB |
Output is correct |
18 |
Correct |
8 ms |
6996 KB |
Output is correct |
19 |
Correct |
7 ms |
6484 KB |
Output is correct |
20 |
Correct |
33 ms |
6932 KB |
Output is correct |
21 |
Correct |
40 ms |
6820 KB |
Output is correct |
22 |
Correct |
3 ms |
4180 KB |
Output is correct |
23 |
Correct |
8 ms |
6400 KB |
Output is correct |
24 |
Correct |
7 ms |
6400 KB |
Output is correct |
25 |
Correct |
3 ms |
4180 KB |
Output is correct |
26 |
Correct |
2 ms |
4180 KB |
Output is correct |
27 |
Correct |
8 ms |
7044 KB |
Output is correct |
28 |
Correct |
7 ms |
6484 KB |
Output is correct |
29 |
Correct |
7 ms |
6356 KB |
Output is correct |
30 |
Correct |
7 ms |
6356 KB |
Output is correct |
31 |
Correct |
3 ms |
4180 KB |
Output is correct |
32 |
Correct |
3 ms |
4208 KB |
Output is correct |
33 |
Correct |
3 ms |
4180 KB |
Output is correct |
34 |
Correct |
3 ms |
4180 KB |
Output is correct |
35 |
Correct |
2 ms |
4180 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
76 ms |
38460 KB |
Output is correct |
2 |
Correct |
3 ms |
4180 KB |
Output is correct |
3 |
Correct |
92 ms |
38020 KB |
Output is correct |
4 |
Correct |
70 ms |
37336 KB |
Output is correct |
5 |
Correct |
80 ms |
38604 KB |
Output is correct |
6 |
Correct |
80 ms |
39000 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
101 ms |
32264 KB |
Output is correct |
2 |
Correct |
135 ms |
27368 KB |
Output is correct |
3 |
Correct |
119 ms |
26696 KB |
Output is correct |
4 |
Correct |
120 ms |
26692 KB |
Output is correct |
5 |
Correct |
128 ms |
26776 KB |
Output is correct |
6 |
Correct |
89 ms |
32460 KB |
Output is correct |
7 |
Correct |
94 ms |
32380 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
101 ms |
32264 KB |
Output is correct |
2 |
Correct |
135 ms |
27368 KB |
Output is correct |
3 |
Correct |
119 ms |
26696 KB |
Output is correct |
4 |
Correct |
120 ms |
26692 KB |
Output is correct |
5 |
Correct |
128 ms |
26776 KB |
Output is correct |
6 |
Correct |
89 ms |
32460 KB |
Output is correct |
7 |
Correct |
94 ms |
32380 KB |
Output is correct |
8 |
Correct |
107 ms |
32436 KB |
Output is correct |
9 |
Correct |
121 ms |
32460 KB |
Output is correct |
10 |
Correct |
74 ms |
38764 KB |
Output is correct |
11 |
Correct |
71 ms |
38596 KB |
Output is correct |
12 |
Correct |
85 ms |
26052 KB |
Output is correct |
13 |
Correct |
101 ms |
26052 KB |
Output is correct |
14 |
Correct |
107 ms |
26660 KB |
Output is correct |
15 |
Correct |
109 ms |
26688 KB |
Output is correct |
16 |
Correct |
111 ms |
26824 KB |
Output is correct |
17 |
Correct |
127 ms |
26828 KB |
Output is correct |
18 |
Correct |
122 ms |
26816 KB |
Output is correct |
19 |
Correct |
112 ms |
27296 KB |
Output is correct |
20 |
Correct |
96 ms |
32672 KB |
Output is correct |
21 |
Correct |
97 ms |
32796 KB |
Output is correct |
22 |
Correct |
99 ms |
32676 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4180 KB |
Output is correct |
2 |
Correct |
7 ms |
6356 KB |
Output is correct |
3 |
Correct |
7 ms |
6356 KB |
Output is correct |
4 |
Correct |
2 ms |
4180 KB |
Output is correct |
5 |
Correct |
3 ms |
4180 KB |
Output is correct |
6 |
Correct |
9 ms |
7084 KB |
Output is correct |
7 |
Correct |
9 ms |
6528 KB |
Output is correct |
8 |
Correct |
8 ms |
6484 KB |
Output is correct |
9 |
Correct |
8 ms |
6408 KB |
Output is correct |
10 |
Correct |
2 ms |
4212 KB |
Output is correct |
11 |
Correct |
3 ms |
4180 KB |
Output is correct |
12 |
Correct |
2 ms |
4180 KB |
Output is correct |
13 |
Correct |
3 ms |
4180 KB |
Output is correct |
14 |
Correct |
2 ms |
4180 KB |
Output is correct |
15 |
Correct |
31 ms |
6884 KB |
Output is correct |
16 |
Correct |
26 ms |
6812 KB |
Output is correct |
17 |
Correct |
27 ms |
6932 KB |
Output is correct |
18 |
Correct |
8 ms |
6996 KB |
Output is correct |
19 |
Correct |
7 ms |
6484 KB |
Output is correct |
20 |
Correct |
33 ms |
6932 KB |
Output is correct |
21 |
Correct |
40 ms |
6820 KB |
Output is correct |
22 |
Correct |
3 ms |
4180 KB |
Output is correct |
23 |
Correct |
8 ms |
6400 KB |
Output is correct |
24 |
Correct |
7 ms |
6400 KB |
Output is correct |
25 |
Correct |
3 ms |
4180 KB |
Output is correct |
26 |
Correct |
2 ms |
4180 KB |
Output is correct |
27 |
Correct |
8 ms |
7044 KB |
Output is correct |
28 |
Correct |
7 ms |
6484 KB |
Output is correct |
29 |
Correct |
7 ms |
6356 KB |
Output is correct |
30 |
Correct |
7 ms |
6356 KB |
Output is correct |
31 |
Correct |
3 ms |
4180 KB |
Output is correct |
32 |
Correct |
3 ms |
4208 KB |
Output is correct |
33 |
Correct |
3 ms |
4180 KB |
Output is correct |
34 |
Correct |
3 ms |
4180 KB |
Output is correct |
35 |
Correct |
2 ms |
4180 KB |
Output is correct |
36 |
Correct |
76 ms |
38460 KB |
Output is correct |
37 |
Correct |
3 ms |
4180 KB |
Output is correct |
38 |
Correct |
92 ms |
38020 KB |
Output is correct |
39 |
Correct |
70 ms |
37336 KB |
Output is correct |
40 |
Correct |
80 ms |
38604 KB |
Output is correct |
41 |
Correct |
80 ms |
39000 KB |
Output is correct |
42 |
Correct |
101 ms |
32264 KB |
Output is correct |
43 |
Correct |
135 ms |
27368 KB |
Output is correct |
44 |
Correct |
119 ms |
26696 KB |
Output is correct |
45 |
Correct |
120 ms |
26692 KB |
Output is correct |
46 |
Correct |
128 ms |
26776 KB |
Output is correct |
47 |
Correct |
89 ms |
32460 KB |
Output is correct |
48 |
Correct |
94 ms |
32380 KB |
Output is correct |
49 |
Correct |
107 ms |
32436 KB |
Output is correct |
50 |
Correct |
121 ms |
32460 KB |
Output is correct |
51 |
Correct |
74 ms |
38764 KB |
Output is correct |
52 |
Correct |
71 ms |
38596 KB |
Output is correct |
53 |
Correct |
85 ms |
26052 KB |
Output is correct |
54 |
Correct |
101 ms |
26052 KB |
Output is correct |
55 |
Correct |
107 ms |
26660 KB |
Output is correct |
56 |
Correct |
109 ms |
26688 KB |
Output is correct |
57 |
Correct |
111 ms |
26824 KB |
Output is correct |
58 |
Correct |
127 ms |
26828 KB |
Output is correct |
59 |
Correct |
122 ms |
26816 KB |
Output is correct |
60 |
Correct |
112 ms |
27296 KB |
Output is correct |
61 |
Correct |
96 ms |
32672 KB |
Output is correct |
62 |
Correct |
97 ms |
32796 KB |
Output is correct |
63 |
Correct |
99 ms |
32676 KB |
Output is correct |
64 |
Correct |
99 ms |
32588 KB |
Output is correct |
65 |
Correct |
132 ms |
26812 KB |
Output is correct |
66 |
Correct |
144 ms |
26740 KB |
Output is correct |
67 |
Correct |
123 ms |
26700 KB |
Output is correct |
68 |
Correct |
83 ms |
25824 KB |
Output is correct |
69 |
Correct |
84 ms |
25832 KB |
Output is correct |
70 |
Correct |
102 ms |
33028 KB |
Output is correct |
71 |
Correct |
100 ms |
32176 KB |
Output is correct |
72 |
Correct |
3 ms |
4216 KB |
Output is correct |
73 |
Correct |
8 ms |
6356 KB |
Output is correct |
74 |
Correct |
7 ms |
6356 KB |
Output is correct |
75 |
Correct |
2 ms |
4180 KB |
Output is correct |
76 |
Correct |
2 ms |
4180 KB |
Output is correct |
77 |
Correct |
8 ms |
7124 KB |
Output is correct |
78 |
Correct |
8 ms |
6484 KB |
Output is correct |
79 |
Correct |
7 ms |
6356 KB |
Output is correct |
80 |
Correct |
7 ms |
6420 KB |
Output is correct |
81 |
Correct |
3 ms |
4180 KB |
Output is correct |
82 |
Correct |
2 ms |
4180 KB |
Output is correct |
83 |
Correct |
4 ms |
4180 KB |
Output is correct |
84 |
Correct |
3 ms |
4180 KB |
Output is correct |
85 |
Correct |
2 ms |
4180 KB |
Output is correct |
86 |
Correct |
27 ms |
6752 KB |
Output is correct |
87 |
Correct |
28 ms |
6844 KB |
Output is correct |
88 |
Correct |
31 ms |
6924 KB |
Output is correct |
89 |
Correct |
9 ms |
6996 KB |
Output is correct |
90 |
Correct |
8 ms |
6484 KB |
Output is correct |
91 |
Correct |
43 ms |
6984 KB |
Output is correct |
92 |
Correct |
40 ms |
6812 KB |
Output is correct |
93 |
Correct |
3 ms |
4180 KB |
Output is correct |
94 |
Correct |
74 ms |
38568 KB |
Output is correct |
95 |
Correct |
70 ms |
38084 KB |
Output is correct |
96 |
Correct |
72 ms |
37340 KB |
Output is correct |
97 |
Correct |
71 ms |
38504 KB |
Output is correct |
98 |
Correct |
81 ms |
38976 KB |
Output is correct |
99 |
Correct |
118 ms |
26808 KB |
Output is correct |
100 |
Correct |
108 ms |
26804 KB |
Output is correct |
101 |
Correct |
125 ms |
26844 KB |
Output is correct |
102 |
Correct |
120 ms |
27368 KB |
Output is correct |
103 |
Correct |
88 ms |
32308 KB |
Output is correct |
104 |
Correct |
89 ms |
32836 KB |
Output is correct |
105 |
Correct |
87 ms |
32352 KB |
Output is correct |
106 |
Correct |
108 ms |
32664 KB |
Output is correct |
107 |
Correct |
113 ms |
32460 KB |
Output is correct |
108 |
Correct |
81 ms |
38672 KB |
Output is correct |
109 |
Correct |
76 ms |
38596 KB |
Output is correct |
110 |
Correct |
93 ms |
26012 KB |
Output is correct |
111 |
Correct |
86 ms |
26056 KB |
Output is correct |
112 |
Correct |
106 ms |
26684 KB |
Output is correct |
113 |
Correct |
124 ms |
26632 KB |
Output is correct |