#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=5e5+5;
const ld pi=3.14159265359;
const ll INF=(1LL<<60);
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()
ll dir[N],d[N],anc[N][21],x,y,n,k,s[N],vis[N],ans,dg[N];
vector<ll> v[N],node[N],col[N];
vector<pll> ed;
ll f(ll id){return (dir[id]==id?id:dir[id]=f(dir[id]));}
void DFS(ll nd,ll pa){
anc[nd][0]=pa;
REP1(i,20)anc[nd][i]=anc[anc[nd][i-1]][i-1];
for(auto i:v[nd]){
if(i==pa)continue;
d[i]=d[nd]+1;
DFS(i,nd);
}
}
ll LCA(ll nda,ll ndb){
if(d[nda]<d[ndb])swap(nda,ndb);
for(int i=20;i>=0;i--)if(d[anc[nda][i]]>=d[ndb])nda=anc[nda][i];
if(nda==ndb)return nda;
for(int i=20;i>=0;i--){
if(anc[nda][i]!=anc[ndb][i])nda=anc[nda][i],ndb=anc[ndb][i];
}
return anc[nda][0];
}
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);
cin>>n>>k;
REP1(i,n)dir[i]=i;
REP(i,n-1){
cin>>x>>y;
v[x].pb(y);v[y].pb(x);
ed.pb(mp(x,y));
}
DFS(1,0);
REP1(i,n)cin>>s[i],node[s[i]].pb(i);
REP1(i,k){
if(!SZ(node[i]))continue;
ll lca=node[i][0];
for(auto j:node[i])lca=LCA(j,lca);
lca=f(lca);
for(auto j:node[i]){
x=f(j);
while(d[x]>d[lca]){
dir[x]=f(anc[x][0]);
x=f(anc[x][0]);
}
}
}
for(auto i:ed){
if(f(i.X)!=f(i.Y)){
++dg[f(i.X)];++dg[f(i.Y)];
}
}
REP1(i,n){
if(dg[i]==1)++ans;
}
cout<<(ans==1?0:(ans+1)/2)<<"\n";
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
35584 KB |
Output is correct |
2 |
Correct |
24 ms |
35584 KB |
Output is correct |
3 |
Correct |
24 ms |
35576 KB |
Output is correct |
4 |
Correct |
24 ms |
35584 KB |
Output is correct |
5 |
Correct |
24 ms |
35576 KB |
Output is correct |
6 |
Correct |
24 ms |
35584 KB |
Output is correct |
7 |
Correct |
24 ms |
35576 KB |
Output is correct |
8 |
Correct |
25 ms |
35584 KB |
Output is correct |
9 |
Correct |
24 ms |
35584 KB |
Output is correct |
10 |
Correct |
24 ms |
35664 KB |
Output is correct |
11 |
Correct |
24 ms |
35584 KB |
Output is correct |
12 |
Correct |
24 ms |
35576 KB |
Output is correct |
13 |
Correct |
24 ms |
35584 KB |
Output is correct |
14 |
Correct |
25 ms |
35584 KB |
Output is correct |
15 |
Correct |
24 ms |
35584 KB |
Output is correct |
16 |
Correct |
24 ms |
35584 KB |
Output is correct |
17 |
Correct |
24 ms |
35584 KB |
Output is correct |
18 |
Correct |
24 ms |
35576 KB |
Output is correct |
19 |
Correct |
24 ms |
35584 KB |
Output is correct |
20 |
Correct |
24 ms |
35576 KB |
Output is correct |
21 |
Correct |
24 ms |
35584 KB |
Output is correct |
22 |
Correct |
24 ms |
35584 KB |
Output is correct |
23 |
Correct |
24 ms |
35584 KB |
Output is correct |
24 |
Correct |
24 ms |
35584 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
35584 KB |
Output is correct |
2 |
Correct |
24 ms |
35584 KB |
Output is correct |
3 |
Correct |
24 ms |
35576 KB |
Output is correct |
4 |
Correct |
24 ms |
35584 KB |
Output is correct |
5 |
Correct |
24 ms |
35576 KB |
Output is correct |
6 |
Correct |
24 ms |
35584 KB |
Output is correct |
7 |
Correct |
24 ms |
35576 KB |
Output is correct |
8 |
Correct |
25 ms |
35584 KB |
Output is correct |
9 |
Correct |
24 ms |
35584 KB |
Output is correct |
10 |
Correct |
24 ms |
35664 KB |
Output is correct |
11 |
Correct |
24 ms |
35584 KB |
Output is correct |
12 |
Correct |
24 ms |
35576 KB |
Output is correct |
13 |
Correct |
24 ms |
35584 KB |
Output is correct |
14 |
Correct |
25 ms |
35584 KB |
Output is correct |
15 |
Correct |
24 ms |
35584 KB |
Output is correct |
16 |
Correct |
24 ms |
35584 KB |
Output is correct |
17 |
Correct |
24 ms |
35584 KB |
Output is correct |
18 |
Correct |
24 ms |
35576 KB |
Output is correct |
19 |
Correct |
24 ms |
35584 KB |
Output is correct |
20 |
Correct |
24 ms |
35576 KB |
Output is correct |
21 |
Correct |
24 ms |
35584 KB |
Output is correct |
22 |
Correct |
24 ms |
35584 KB |
Output is correct |
23 |
Correct |
24 ms |
35584 KB |
Output is correct |
24 |
Correct |
24 ms |
35584 KB |
Output is correct |
25 |
Correct |
24 ms |
35584 KB |
Output is correct |
26 |
Correct |
27 ms |
36428 KB |
Output is correct |
27 |
Correct |
27 ms |
36472 KB |
Output is correct |
28 |
Correct |
28 ms |
36608 KB |
Output is correct |
29 |
Correct |
27 ms |
36480 KB |
Output is correct |
30 |
Correct |
26 ms |
36480 KB |
Output is correct |
31 |
Correct |
24 ms |
35584 KB |
Output is correct |
32 |
Correct |
27 ms |
36608 KB |
Output is correct |
33 |
Correct |
24 ms |
35584 KB |
Output is correct |
34 |
Correct |
27 ms |
36352 KB |
Output is correct |
35 |
Correct |
27 ms |
36480 KB |
Output is correct |
36 |
Correct |
27 ms |
36480 KB |
Output is correct |
37 |
Correct |
27 ms |
36472 KB |
Output is correct |
38 |
Correct |
24 ms |
35584 KB |
Output is correct |
39 |
Correct |
27 ms |
36472 KB |
Output is correct |
40 |
Correct |
26 ms |
36480 KB |
Output is correct |
41 |
Correct |
27 ms |
36472 KB |
Output is correct |
42 |
Correct |
27 ms |
36480 KB |
Output is correct |
43 |
Correct |
26 ms |
36608 KB |
Output is correct |
44 |
Correct |
24 ms |
35652 KB |
Output is correct |
45 |
Correct |
27 ms |
36480 KB |
Output is correct |
46 |
Correct |
27 ms |
36384 KB |
Output is correct |
47 |
Correct |
24 ms |
35584 KB |
Output is correct |
48 |
Correct |
27 ms |
36480 KB |
Output is correct |
49 |
Correct |
27 ms |
36604 KB |
Output is correct |
50 |
Correct |
27 ms |
36480 KB |
Output is correct |
51 |
Correct |
27 ms |
36480 KB |
Output is correct |
52 |
Correct |
26 ms |
36476 KB |
Output is correct |
53 |
Correct |
27 ms |
36480 KB |
Output is correct |
54 |
Correct |
27 ms |
36344 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
35584 KB |
Output is correct |
2 |
Correct |
24 ms |
35584 KB |
Output is correct |
3 |
Correct |
24 ms |
35576 KB |
Output is correct |
4 |
Correct |
24 ms |
35584 KB |
Output is correct |
5 |
Correct |
24 ms |
35576 KB |
Output is correct |
6 |
Correct |
24 ms |
35584 KB |
Output is correct |
7 |
Correct |
24 ms |
35576 KB |
Output is correct |
8 |
Correct |
25 ms |
35584 KB |
Output is correct |
9 |
Correct |
24 ms |
35584 KB |
Output is correct |
10 |
Correct |
24 ms |
35664 KB |
Output is correct |
11 |
Correct |
24 ms |
35584 KB |
Output is correct |
12 |
Correct |
24 ms |
35576 KB |
Output is correct |
13 |
Correct |
24 ms |
35584 KB |
Output is correct |
14 |
Correct |
25 ms |
35584 KB |
Output is correct |
15 |
Correct |
24 ms |
35584 KB |
Output is correct |
16 |
Correct |
24 ms |
35584 KB |
Output is correct |
17 |
Correct |
24 ms |
35584 KB |
Output is correct |
18 |
Correct |
24 ms |
35576 KB |
Output is correct |
19 |
Correct |
24 ms |
35584 KB |
Output is correct |
20 |
Correct |
24 ms |
35576 KB |
Output is correct |
21 |
Correct |
24 ms |
35584 KB |
Output is correct |
22 |
Correct |
24 ms |
35584 KB |
Output is correct |
23 |
Correct |
24 ms |
35584 KB |
Output is correct |
24 |
Correct |
24 ms |
35584 KB |
Output is correct |
25 |
Correct |
24 ms |
35584 KB |
Output is correct |
26 |
Correct |
131 ms |
62300 KB |
Output is correct |
27 |
Correct |
159 ms |
62180 KB |
Output is correct |
28 |
Correct |
27 ms |
36480 KB |
Output is correct |
29 |
Correct |
24 ms |
35576 KB |
Output is correct |
30 |
Correct |
24 ms |
35584 KB |
Output is correct |
31 |
Correct |
160 ms |
62180 KB |
Output is correct |
32 |
Correct |
26 ms |
36352 KB |
Output is correct |
33 |
Correct |
202 ms |
65892 KB |
Output is correct |
34 |
Correct |
156 ms |
62308 KB |
Output is correct |
35 |
Correct |
27 ms |
36472 KB |
Output is correct |
36 |
Correct |
198 ms |
62180 KB |
Output is correct |
37 |
Correct |
27 ms |
36472 KB |
Output is correct |
38 |
Correct |
27 ms |
36480 KB |
Output is correct |
39 |
Correct |
131 ms |
62308 KB |
Output is correct |
40 |
Correct |
27 ms |
36608 KB |
Output is correct |
41 |
Correct |
149 ms |
62952 KB |
Output is correct |
42 |
Correct |
215 ms |
63076 KB |
Output is correct |
43 |
Correct |
24 ms |
35576 KB |
Output is correct |
44 |
Correct |
192 ms |
66792 KB |
Output is correct |
45 |
Correct |
196 ms |
65124 KB |
Output is correct |
46 |
Correct |
26 ms |
36472 KB |
Output is correct |
47 |
Correct |
27 ms |
36352 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
125 ms |
60968 KB |
Output is correct |
2 |
Correct |
147 ms |
63904 KB |
Output is correct |
3 |
Correct |
27 ms |
36352 KB |
Output is correct |
4 |
Correct |
27 ms |
36472 KB |
Output is correct |
5 |
Correct |
24 ms |
35584 KB |
Output is correct |
6 |
Correct |
24 ms |
35688 KB |
Output is correct |
7 |
Correct |
27 ms |
36352 KB |
Output is correct |
8 |
Correct |
197 ms |
64152 KB |
Output is correct |
9 |
Correct |
27 ms |
36480 KB |
Output is correct |
10 |
Correct |
169 ms |
63076 KB |
Output is correct |
11 |
Correct |
24 ms |
35584 KB |
Output is correct |
12 |
Correct |
178 ms |
62772 KB |
Output is correct |
13 |
Correct |
179 ms |
64012 KB |
Output is correct |
14 |
Correct |
184 ms |
65380 KB |
Output is correct |
15 |
Correct |
134 ms |
62448 KB |
Output is correct |
16 |
Correct |
27 ms |
36472 KB |
Output is correct |
17 |
Correct |
24 ms |
35584 KB |
Output is correct |
18 |
Correct |
153 ms |
65252 KB |
Output is correct |
19 |
Correct |
214 ms |
67172 KB |
Output is correct |
20 |
Correct |
28 ms |
36472 KB |
Output is correct |
21 |
Correct |
24 ms |
35584 KB |
Output is correct |
22 |
Correct |
144 ms |
64096 KB |
Output is correct |
23 |
Correct |
28 ms |
36480 KB |
Output is correct |
24 |
Correct |
175 ms |
63332 KB |
Output is correct |
25 |
Correct |
210 ms |
67172 KB |
Output is correct |
26 |
Correct |
27 ms |
36472 KB |
Output is correct |
27 |
Correct |
28 ms |
36480 KB |
Output is correct |
28 |
Correct |
27 ms |
36480 KB |
Output is correct |
29 |
Correct |
26 ms |
36480 KB |
Output is correct |
30 |
Correct |
27 ms |
36476 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
35584 KB |
Output is correct |
2 |
Correct |
24 ms |
35584 KB |
Output is correct |
3 |
Correct |
24 ms |
35576 KB |
Output is correct |
4 |
Correct |
24 ms |
35584 KB |
Output is correct |
5 |
Correct |
24 ms |
35576 KB |
Output is correct |
6 |
Correct |
24 ms |
35584 KB |
Output is correct |
7 |
Correct |
24 ms |
35576 KB |
Output is correct |
8 |
Correct |
25 ms |
35584 KB |
Output is correct |
9 |
Correct |
24 ms |
35584 KB |
Output is correct |
10 |
Correct |
24 ms |
35664 KB |
Output is correct |
11 |
Correct |
24 ms |
35584 KB |
Output is correct |
12 |
Correct |
24 ms |
35576 KB |
Output is correct |
13 |
Correct |
24 ms |
35584 KB |
Output is correct |
14 |
Correct |
25 ms |
35584 KB |
Output is correct |
15 |
Correct |
24 ms |
35584 KB |
Output is correct |
16 |
Correct |
24 ms |
35584 KB |
Output is correct |
17 |
Correct |
24 ms |
35584 KB |
Output is correct |
18 |
Correct |
24 ms |
35576 KB |
Output is correct |
19 |
Correct |
24 ms |
35584 KB |
Output is correct |
20 |
Correct |
24 ms |
35576 KB |
Output is correct |
21 |
Correct |
24 ms |
35584 KB |
Output is correct |
22 |
Correct |
24 ms |
35584 KB |
Output is correct |
23 |
Correct |
24 ms |
35584 KB |
Output is correct |
24 |
Correct |
24 ms |
35584 KB |
Output is correct |
25 |
Correct |
24 ms |
35584 KB |
Output is correct |
26 |
Correct |
27 ms |
36428 KB |
Output is correct |
27 |
Correct |
27 ms |
36472 KB |
Output is correct |
28 |
Correct |
28 ms |
36608 KB |
Output is correct |
29 |
Correct |
27 ms |
36480 KB |
Output is correct |
30 |
Correct |
26 ms |
36480 KB |
Output is correct |
31 |
Correct |
24 ms |
35584 KB |
Output is correct |
32 |
Correct |
27 ms |
36608 KB |
Output is correct |
33 |
Correct |
24 ms |
35584 KB |
Output is correct |
34 |
Correct |
27 ms |
36352 KB |
Output is correct |
35 |
Correct |
27 ms |
36480 KB |
Output is correct |
36 |
Correct |
27 ms |
36480 KB |
Output is correct |
37 |
Correct |
27 ms |
36472 KB |
Output is correct |
38 |
Correct |
24 ms |
35584 KB |
Output is correct |
39 |
Correct |
27 ms |
36472 KB |
Output is correct |
40 |
Correct |
26 ms |
36480 KB |
Output is correct |
41 |
Correct |
27 ms |
36472 KB |
Output is correct |
42 |
Correct |
27 ms |
36480 KB |
Output is correct |
43 |
Correct |
26 ms |
36608 KB |
Output is correct |
44 |
Correct |
24 ms |
35652 KB |
Output is correct |
45 |
Correct |
27 ms |
36480 KB |
Output is correct |
46 |
Correct |
27 ms |
36384 KB |
Output is correct |
47 |
Correct |
24 ms |
35584 KB |
Output is correct |
48 |
Correct |
27 ms |
36480 KB |
Output is correct |
49 |
Correct |
27 ms |
36604 KB |
Output is correct |
50 |
Correct |
27 ms |
36480 KB |
Output is correct |
51 |
Correct |
27 ms |
36480 KB |
Output is correct |
52 |
Correct |
26 ms |
36476 KB |
Output is correct |
53 |
Correct |
27 ms |
36480 KB |
Output is correct |
54 |
Correct |
27 ms |
36344 KB |
Output is correct |
55 |
Correct |
24 ms |
35584 KB |
Output is correct |
56 |
Correct |
131 ms |
62300 KB |
Output is correct |
57 |
Correct |
159 ms |
62180 KB |
Output is correct |
58 |
Correct |
27 ms |
36480 KB |
Output is correct |
59 |
Correct |
24 ms |
35576 KB |
Output is correct |
60 |
Correct |
24 ms |
35584 KB |
Output is correct |
61 |
Correct |
160 ms |
62180 KB |
Output is correct |
62 |
Correct |
26 ms |
36352 KB |
Output is correct |
63 |
Correct |
202 ms |
65892 KB |
Output is correct |
64 |
Correct |
156 ms |
62308 KB |
Output is correct |
65 |
Correct |
27 ms |
36472 KB |
Output is correct |
66 |
Correct |
198 ms |
62180 KB |
Output is correct |
67 |
Correct |
27 ms |
36472 KB |
Output is correct |
68 |
Correct |
27 ms |
36480 KB |
Output is correct |
69 |
Correct |
131 ms |
62308 KB |
Output is correct |
70 |
Correct |
27 ms |
36608 KB |
Output is correct |
71 |
Correct |
149 ms |
62952 KB |
Output is correct |
72 |
Correct |
215 ms |
63076 KB |
Output is correct |
73 |
Correct |
24 ms |
35576 KB |
Output is correct |
74 |
Correct |
192 ms |
66792 KB |
Output is correct |
75 |
Correct |
196 ms |
65124 KB |
Output is correct |
76 |
Correct |
26 ms |
36472 KB |
Output is correct |
77 |
Correct |
27 ms |
36352 KB |
Output is correct |
78 |
Correct |
125 ms |
60968 KB |
Output is correct |
79 |
Correct |
147 ms |
63904 KB |
Output is correct |
80 |
Correct |
27 ms |
36352 KB |
Output is correct |
81 |
Correct |
27 ms |
36472 KB |
Output is correct |
82 |
Correct |
24 ms |
35584 KB |
Output is correct |
83 |
Correct |
24 ms |
35688 KB |
Output is correct |
84 |
Correct |
27 ms |
36352 KB |
Output is correct |
85 |
Correct |
197 ms |
64152 KB |
Output is correct |
86 |
Correct |
27 ms |
36480 KB |
Output is correct |
87 |
Correct |
169 ms |
63076 KB |
Output is correct |
88 |
Correct |
24 ms |
35584 KB |
Output is correct |
89 |
Correct |
178 ms |
62772 KB |
Output is correct |
90 |
Correct |
179 ms |
64012 KB |
Output is correct |
91 |
Correct |
184 ms |
65380 KB |
Output is correct |
92 |
Correct |
134 ms |
62448 KB |
Output is correct |
93 |
Correct |
27 ms |
36472 KB |
Output is correct |
94 |
Correct |
24 ms |
35584 KB |
Output is correct |
95 |
Correct |
153 ms |
65252 KB |
Output is correct |
96 |
Correct |
214 ms |
67172 KB |
Output is correct |
97 |
Correct |
28 ms |
36472 KB |
Output is correct |
98 |
Correct |
24 ms |
35584 KB |
Output is correct |
99 |
Correct |
144 ms |
64096 KB |
Output is correct |
100 |
Correct |
28 ms |
36480 KB |
Output is correct |
101 |
Correct |
175 ms |
63332 KB |
Output is correct |
102 |
Correct |
210 ms |
67172 KB |
Output is correct |
103 |
Correct |
27 ms |
36472 KB |
Output is correct |
104 |
Correct |
28 ms |
36480 KB |
Output is correct |
105 |
Correct |
27 ms |
36480 KB |
Output is correct |
106 |
Correct |
26 ms |
36480 KB |
Output is correct |
107 |
Correct |
27 ms |
36476 KB |
Output is correct |
108 |
Correct |
830 ms |
179464 KB |
Output is correct |
109 |
Correct |
1358 ms |
179240 KB |
Output is correct |
110 |
Correct |
1166 ms |
186576 KB |
Output is correct |
111 |
Correct |
1483 ms |
196708 KB |
Output is correct |
112 |
Correct |
1582 ms |
195024 KB |
Output is correct |
113 |
Correct |
923 ms |
185080 KB |
Output is correct |
114 |
Correct |
858 ms |
169168 KB |
Output is correct |
115 |
Correct |
841 ms |
171712 KB |
Output is correct |
116 |
Correct |
1166 ms |
175696 KB |
Output is correct |
117 |
Correct |
1058 ms |
185596 KB |
Output is correct |
118 |
Correct |
886 ms |
170128 KB |
Output is correct |
119 |
Correct |
1045 ms |
185552 KB |
Output is correct |
120 |
Correct |
1509 ms |
195280 KB |
Output is correct |
121 |
Correct |
1035 ms |
185552 KB |
Output is correct |
122 |
Correct |
1198 ms |
180016 KB |
Output is correct |
123 |
Correct |
798 ms |
186560 KB |
Output is correct |
124 |
Correct |
1325 ms |
179780 KB |
Output is correct |