#include <algorithm>
#include <iostream>
#include <vector>
#include <map>
using namespace std;
const int NMAX = 5e5;
const int LGMAX = 19;
vector <int> adj[NMAX + 1];
int s[NMAX + 1];
int lvl[NMAX + 1];
int dp[NMAX + 1][LGMAX + 1];
void dfs1(int node, int parent){
lvl[node] = lvl[parent] + 1;
dp[node][0] = parent;
for(int child : adj[node]){
if(child != parent){
dfs1(child, node);
}
}
}
int LCA(int a, int b){
if(lvl[a] < lvl[b]){
swap(a, b);
}
int diff = lvl[a] - lvl[b];
for(int i = LGMAX; i >= 0; i--){
if(diff & (1 << i)){
a = dp[a][i];
}
}
if(a == b){
return a;
}
for(int i = LGMAX; i >= 0; i--){
if(dp[a][i] != dp[b][i]){
a = dp[a][i];
b = dp[b][i];
}
}
return dp[a][0];
}
int glca[NMAX + 1];
int bad[NMAX + 1];
int dfs2(int node, int parent){
int mini = lvl[glca[s[node]]];
for(int child : adj[node]){
if(child != parent){
mini = min(mini, dfs2(child, node));
}
}
if(mini >= lvl[node]){
bad[node] = parent;
}
return mini;
}
int Id = 0;
int id[NMAX + 1];
void dfs3(int node, int parent){
if(bad[node] == parent){
id[node] = ++Id;
}else{
id[node] = id[parent];
}
for(int child : adj[node]){
if(child != parent){
dfs3(child, node);
}
}
}
vector <int> T[NMAX + 1];
void dfs4(int node, int parent){
for(int child : adj[node]){
if(child != parent){
if(id[child] != id[node]){
T[id[node]].push_back(id[child]);
T[id[child]].push_back(id[node]);
}
dfs4(child, node);
}
}
}
int main(){
int n, k;
cin >> n >> k;
for(int i = 1; i <= n - 1; i++){
int a, b;
cin >> a >> b;
adj[a].push_back(b);
adj[b].push_back(a);
}
for(int i = 1; i <= n; i++){
cin >> s[i];
}
dfs1(1, 0);
for(int j = 1; (1 << j) <= n; j++){
for(int i = 1; i <= n; i++){
dp[i][j] = dp[dp[i][j - 1]][j - 1];
}
}
for(int i = 1; i <= n; i++){
if(glca[s[i]] == 0){
glca[s[i]] = i;
}else{
glca[s[i]] = LCA(glca[s[i]], i);
}
}
dfs2(1, 0);
dfs3(1, 0);
dfs4(1, 0);
int leafs = 0;
for(int i = 1; i <= Id; i++){
sort(T[i].begin(), T[i].end());
T[i].erase(unique(T[i].begin(), T[i].end()), T[i].end());
if((int)T[i].size() == 1){
leafs++;
}
}
cout << (leafs / 2) + (leafs % 2) << '\n';
return 0;
}
/*
5 4
1 2
2 3
3 4
3 5
1
2
1
3
4
*/
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
31580 KB |
Output is correct |
2 |
Correct |
6 ms |
31580 KB |
Output is correct |
3 |
Correct |
6 ms |
31836 KB |
Output is correct |
4 |
Correct |
6 ms |
31580 KB |
Output is correct |
5 |
Correct |
6 ms |
31580 KB |
Output is correct |
6 |
Correct |
6 ms |
31836 KB |
Output is correct |
7 |
Correct |
7 ms |
31920 KB |
Output is correct |
8 |
Correct |
6 ms |
31580 KB |
Output is correct |
9 |
Correct |
6 ms |
31580 KB |
Output is correct |
10 |
Correct |
6 ms |
31580 KB |
Output is correct |
11 |
Correct |
6 ms |
31580 KB |
Output is correct |
12 |
Correct |
6 ms |
31580 KB |
Output is correct |
13 |
Correct |
6 ms |
31580 KB |
Output is correct |
14 |
Correct |
6 ms |
31816 KB |
Output is correct |
15 |
Correct |
6 ms |
31836 KB |
Output is correct |
16 |
Correct |
6 ms |
31580 KB |
Output is correct |
17 |
Correct |
6 ms |
31796 KB |
Output is correct |
18 |
Correct |
6 ms |
31580 KB |
Output is correct |
19 |
Correct |
6 ms |
31800 KB |
Output is correct |
20 |
Correct |
6 ms |
31580 KB |
Output is correct |
21 |
Correct |
6 ms |
31580 KB |
Output is correct |
22 |
Correct |
6 ms |
31580 KB |
Output is correct |
23 |
Correct |
6 ms |
31780 KB |
Output is correct |
24 |
Correct |
6 ms |
31580 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
31580 KB |
Output is correct |
2 |
Correct |
6 ms |
31580 KB |
Output is correct |
3 |
Correct |
6 ms |
31836 KB |
Output is correct |
4 |
Correct |
6 ms |
31580 KB |
Output is correct |
5 |
Correct |
6 ms |
31580 KB |
Output is correct |
6 |
Correct |
6 ms |
31836 KB |
Output is correct |
7 |
Correct |
7 ms |
31920 KB |
Output is correct |
8 |
Correct |
6 ms |
31580 KB |
Output is correct |
9 |
Correct |
6 ms |
31580 KB |
Output is correct |
10 |
Correct |
6 ms |
31580 KB |
Output is correct |
11 |
Correct |
6 ms |
31580 KB |
Output is correct |
12 |
Correct |
6 ms |
31580 KB |
Output is correct |
13 |
Correct |
6 ms |
31580 KB |
Output is correct |
14 |
Correct |
6 ms |
31816 KB |
Output is correct |
15 |
Correct |
6 ms |
31836 KB |
Output is correct |
16 |
Correct |
6 ms |
31580 KB |
Output is correct |
17 |
Correct |
6 ms |
31796 KB |
Output is correct |
18 |
Correct |
6 ms |
31580 KB |
Output is correct |
19 |
Correct |
6 ms |
31800 KB |
Output is correct |
20 |
Correct |
6 ms |
31580 KB |
Output is correct |
21 |
Correct |
6 ms |
31580 KB |
Output is correct |
22 |
Correct |
6 ms |
31580 KB |
Output is correct |
23 |
Correct |
6 ms |
31780 KB |
Output is correct |
24 |
Correct |
6 ms |
31580 KB |
Output is correct |
25 |
Correct |
6 ms |
31580 KB |
Output is correct |
26 |
Correct |
9 ms |
31940 KB |
Output is correct |
27 |
Correct |
8 ms |
31836 KB |
Output is correct |
28 |
Correct |
9 ms |
32092 KB |
Output is correct |
29 |
Correct |
8 ms |
31836 KB |
Output is correct |
30 |
Correct |
8 ms |
31832 KB |
Output is correct |
31 |
Correct |
6 ms |
31576 KB |
Output is correct |
32 |
Correct |
9 ms |
32092 KB |
Output is correct |
33 |
Correct |
6 ms |
31580 KB |
Output is correct |
34 |
Correct |
8 ms |
31836 KB |
Output is correct |
35 |
Correct |
9 ms |
31836 KB |
Output is correct |
36 |
Correct |
9 ms |
31836 KB |
Output is correct |
37 |
Correct |
8 ms |
31808 KB |
Output is correct |
38 |
Correct |
6 ms |
31572 KB |
Output is correct |
39 |
Correct |
8 ms |
31836 KB |
Output is correct |
40 |
Correct |
8 ms |
31836 KB |
Output is correct |
41 |
Correct |
8 ms |
31836 KB |
Output is correct |
42 |
Correct |
8 ms |
31856 KB |
Output is correct |
43 |
Correct |
8 ms |
32088 KB |
Output is correct |
44 |
Correct |
6 ms |
31576 KB |
Output is correct |
45 |
Correct |
8 ms |
31808 KB |
Output is correct |
46 |
Correct |
8 ms |
31832 KB |
Output is correct |
47 |
Correct |
6 ms |
31576 KB |
Output is correct |
48 |
Correct |
8 ms |
31836 KB |
Output is correct |
49 |
Correct |
8 ms |
32072 KB |
Output is correct |
50 |
Correct |
8 ms |
32096 KB |
Output is correct |
51 |
Correct |
10 ms |
31832 KB |
Output is correct |
52 |
Correct |
8 ms |
31840 KB |
Output is correct |
53 |
Correct |
8 ms |
31840 KB |
Output is correct |
54 |
Correct |
9 ms |
31840 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
31580 KB |
Output is correct |
2 |
Correct |
6 ms |
31580 KB |
Output is correct |
3 |
Correct |
6 ms |
31836 KB |
Output is correct |
4 |
Correct |
6 ms |
31580 KB |
Output is correct |
5 |
Correct |
6 ms |
31580 KB |
Output is correct |
6 |
Correct |
6 ms |
31836 KB |
Output is correct |
7 |
Correct |
7 ms |
31920 KB |
Output is correct |
8 |
Correct |
6 ms |
31580 KB |
Output is correct |
9 |
Correct |
6 ms |
31580 KB |
Output is correct |
10 |
Correct |
6 ms |
31580 KB |
Output is correct |
11 |
Correct |
6 ms |
31580 KB |
Output is correct |
12 |
Correct |
6 ms |
31580 KB |
Output is correct |
13 |
Correct |
6 ms |
31580 KB |
Output is correct |
14 |
Correct |
6 ms |
31816 KB |
Output is correct |
15 |
Correct |
6 ms |
31836 KB |
Output is correct |
16 |
Correct |
6 ms |
31580 KB |
Output is correct |
17 |
Correct |
6 ms |
31796 KB |
Output is correct |
18 |
Correct |
6 ms |
31580 KB |
Output is correct |
19 |
Correct |
6 ms |
31800 KB |
Output is correct |
20 |
Correct |
6 ms |
31580 KB |
Output is correct |
21 |
Correct |
6 ms |
31580 KB |
Output is correct |
22 |
Correct |
6 ms |
31580 KB |
Output is correct |
23 |
Correct |
6 ms |
31780 KB |
Output is correct |
24 |
Correct |
6 ms |
31580 KB |
Output is correct |
25 |
Correct |
6 ms |
31584 KB |
Output is correct |
26 |
Correct |
79 ms |
45256 KB |
Output is correct |
27 |
Correct |
93 ms |
44936 KB |
Output is correct |
28 |
Correct |
8 ms |
31832 KB |
Output is correct |
29 |
Correct |
6 ms |
31836 KB |
Output is correct |
30 |
Correct |
6 ms |
31580 KB |
Output is correct |
31 |
Correct |
97 ms |
45000 KB |
Output is correct |
32 |
Correct |
8 ms |
31832 KB |
Output is correct |
33 |
Correct |
113 ms |
53704 KB |
Output is correct |
34 |
Correct |
95 ms |
45060 KB |
Output is correct |
35 |
Correct |
8 ms |
31836 KB |
Output is correct |
36 |
Correct |
104 ms |
45932 KB |
Output is correct |
37 |
Correct |
8 ms |
31832 KB |
Output is correct |
38 |
Correct |
8 ms |
31800 KB |
Output is correct |
39 |
Correct |
79 ms |
45156 KB |
Output is correct |
40 |
Correct |
8 ms |
32092 KB |
Output is correct |
41 |
Correct |
89 ms |
44792 KB |
Output is correct |
42 |
Correct |
112 ms |
47668 KB |
Output is correct |
43 |
Correct |
6 ms |
31576 KB |
Output is correct |
44 |
Correct |
113 ms |
53908 KB |
Output is correct |
45 |
Correct |
105 ms |
49492 KB |
Output is correct |
46 |
Correct |
8 ms |
31836 KB |
Output is correct |
47 |
Correct |
8 ms |
31836 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
80 ms |
45380 KB |
Output is correct |
2 |
Correct |
100 ms |
49396 KB |
Output is correct |
3 |
Correct |
9 ms |
31836 KB |
Output is correct |
4 |
Correct |
8 ms |
31824 KB |
Output is correct |
5 |
Correct |
6 ms |
31576 KB |
Output is correct |
6 |
Correct |
6 ms |
31576 KB |
Output is correct |
7 |
Correct |
8 ms |
31836 KB |
Output is correct |
8 |
Correct |
107 ms |
45908 KB |
Output is correct |
9 |
Correct |
8 ms |
31832 KB |
Output is correct |
10 |
Correct |
101 ms |
45140 KB |
Output is correct |
11 |
Correct |
6 ms |
31580 KB |
Output is correct |
12 |
Correct |
105 ms |
45136 KB |
Output is correct |
13 |
Correct |
114 ms |
46008 KB |
Output is correct |
14 |
Correct |
120 ms |
48864 KB |
Output is correct |
15 |
Correct |
78 ms |
45128 KB |
Output is correct |
16 |
Correct |
8 ms |
31812 KB |
Output is correct |
17 |
Correct |
6 ms |
31836 KB |
Output is correct |
18 |
Correct |
94 ms |
48676 KB |
Output is correct |
19 |
Correct |
119 ms |
53476 KB |
Output is correct |
20 |
Correct |
8 ms |
31836 KB |
Output is correct |
21 |
Correct |
6 ms |
31580 KB |
Output is correct |
22 |
Correct |
89 ms |
46284 KB |
Output is correct |
23 |
Correct |
10 ms |
31836 KB |
Output is correct |
24 |
Correct |
114 ms |
45544 KB |
Output is correct |
25 |
Correct |
115 ms |
51792 KB |
Output is correct |
26 |
Correct |
9 ms |
32088 KB |
Output is correct |
27 |
Correct |
8 ms |
32092 KB |
Output is correct |
28 |
Correct |
8 ms |
31836 KB |
Output is correct |
29 |
Correct |
8 ms |
31836 KB |
Output is correct |
30 |
Correct |
8 ms |
31836 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
31580 KB |
Output is correct |
2 |
Correct |
6 ms |
31580 KB |
Output is correct |
3 |
Correct |
6 ms |
31836 KB |
Output is correct |
4 |
Correct |
6 ms |
31580 KB |
Output is correct |
5 |
Correct |
6 ms |
31580 KB |
Output is correct |
6 |
Correct |
6 ms |
31836 KB |
Output is correct |
7 |
Correct |
7 ms |
31920 KB |
Output is correct |
8 |
Correct |
6 ms |
31580 KB |
Output is correct |
9 |
Correct |
6 ms |
31580 KB |
Output is correct |
10 |
Correct |
6 ms |
31580 KB |
Output is correct |
11 |
Correct |
6 ms |
31580 KB |
Output is correct |
12 |
Correct |
6 ms |
31580 KB |
Output is correct |
13 |
Correct |
6 ms |
31580 KB |
Output is correct |
14 |
Correct |
6 ms |
31816 KB |
Output is correct |
15 |
Correct |
6 ms |
31836 KB |
Output is correct |
16 |
Correct |
6 ms |
31580 KB |
Output is correct |
17 |
Correct |
6 ms |
31796 KB |
Output is correct |
18 |
Correct |
6 ms |
31580 KB |
Output is correct |
19 |
Correct |
6 ms |
31800 KB |
Output is correct |
20 |
Correct |
6 ms |
31580 KB |
Output is correct |
21 |
Correct |
6 ms |
31580 KB |
Output is correct |
22 |
Correct |
6 ms |
31580 KB |
Output is correct |
23 |
Correct |
6 ms |
31780 KB |
Output is correct |
24 |
Correct |
6 ms |
31580 KB |
Output is correct |
25 |
Correct |
6 ms |
31580 KB |
Output is correct |
26 |
Correct |
9 ms |
31940 KB |
Output is correct |
27 |
Correct |
8 ms |
31836 KB |
Output is correct |
28 |
Correct |
9 ms |
32092 KB |
Output is correct |
29 |
Correct |
8 ms |
31836 KB |
Output is correct |
30 |
Correct |
8 ms |
31832 KB |
Output is correct |
31 |
Correct |
6 ms |
31576 KB |
Output is correct |
32 |
Correct |
9 ms |
32092 KB |
Output is correct |
33 |
Correct |
6 ms |
31580 KB |
Output is correct |
34 |
Correct |
8 ms |
31836 KB |
Output is correct |
35 |
Correct |
9 ms |
31836 KB |
Output is correct |
36 |
Correct |
9 ms |
31836 KB |
Output is correct |
37 |
Correct |
8 ms |
31808 KB |
Output is correct |
38 |
Correct |
6 ms |
31572 KB |
Output is correct |
39 |
Correct |
8 ms |
31836 KB |
Output is correct |
40 |
Correct |
8 ms |
31836 KB |
Output is correct |
41 |
Correct |
8 ms |
31836 KB |
Output is correct |
42 |
Correct |
8 ms |
31856 KB |
Output is correct |
43 |
Correct |
8 ms |
32088 KB |
Output is correct |
44 |
Correct |
6 ms |
31576 KB |
Output is correct |
45 |
Correct |
8 ms |
31808 KB |
Output is correct |
46 |
Correct |
8 ms |
31832 KB |
Output is correct |
47 |
Correct |
6 ms |
31576 KB |
Output is correct |
48 |
Correct |
8 ms |
31836 KB |
Output is correct |
49 |
Correct |
8 ms |
32072 KB |
Output is correct |
50 |
Correct |
8 ms |
32096 KB |
Output is correct |
51 |
Correct |
10 ms |
31832 KB |
Output is correct |
52 |
Correct |
8 ms |
31840 KB |
Output is correct |
53 |
Correct |
8 ms |
31840 KB |
Output is correct |
54 |
Correct |
9 ms |
31840 KB |
Output is correct |
55 |
Correct |
6 ms |
31584 KB |
Output is correct |
56 |
Correct |
79 ms |
45256 KB |
Output is correct |
57 |
Correct |
93 ms |
44936 KB |
Output is correct |
58 |
Correct |
8 ms |
31832 KB |
Output is correct |
59 |
Correct |
6 ms |
31836 KB |
Output is correct |
60 |
Correct |
6 ms |
31580 KB |
Output is correct |
61 |
Correct |
97 ms |
45000 KB |
Output is correct |
62 |
Correct |
8 ms |
31832 KB |
Output is correct |
63 |
Correct |
113 ms |
53704 KB |
Output is correct |
64 |
Correct |
95 ms |
45060 KB |
Output is correct |
65 |
Correct |
8 ms |
31836 KB |
Output is correct |
66 |
Correct |
104 ms |
45932 KB |
Output is correct |
67 |
Correct |
8 ms |
31832 KB |
Output is correct |
68 |
Correct |
8 ms |
31800 KB |
Output is correct |
69 |
Correct |
79 ms |
45156 KB |
Output is correct |
70 |
Correct |
8 ms |
32092 KB |
Output is correct |
71 |
Correct |
89 ms |
44792 KB |
Output is correct |
72 |
Correct |
112 ms |
47668 KB |
Output is correct |
73 |
Correct |
6 ms |
31576 KB |
Output is correct |
74 |
Correct |
113 ms |
53908 KB |
Output is correct |
75 |
Correct |
105 ms |
49492 KB |
Output is correct |
76 |
Correct |
8 ms |
31836 KB |
Output is correct |
77 |
Correct |
8 ms |
31836 KB |
Output is correct |
78 |
Correct |
80 ms |
45380 KB |
Output is correct |
79 |
Correct |
100 ms |
49396 KB |
Output is correct |
80 |
Correct |
9 ms |
31836 KB |
Output is correct |
81 |
Correct |
8 ms |
31824 KB |
Output is correct |
82 |
Correct |
6 ms |
31576 KB |
Output is correct |
83 |
Correct |
6 ms |
31576 KB |
Output is correct |
84 |
Correct |
8 ms |
31836 KB |
Output is correct |
85 |
Correct |
107 ms |
45908 KB |
Output is correct |
86 |
Correct |
8 ms |
31832 KB |
Output is correct |
87 |
Correct |
101 ms |
45140 KB |
Output is correct |
88 |
Correct |
6 ms |
31580 KB |
Output is correct |
89 |
Correct |
105 ms |
45136 KB |
Output is correct |
90 |
Correct |
114 ms |
46008 KB |
Output is correct |
91 |
Correct |
120 ms |
48864 KB |
Output is correct |
92 |
Correct |
78 ms |
45128 KB |
Output is correct |
93 |
Correct |
8 ms |
31812 KB |
Output is correct |
94 |
Correct |
6 ms |
31836 KB |
Output is correct |
95 |
Correct |
94 ms |
48676 KB |
Output is correct |
96 |
Correct |
119 ms |
53476 KB |
Output is correct |
97 |
Correct |
8 ms |
31836 KB |
Output is correct |
98 |
Correct |
6 ms |
31580 KB |
Output is correct |
99 |
Correct |
89 ms |
46284 KB |
Output is correct |
100 |
Correct |
10 ms |
31836 KB |
Output is correct |
101 |
Correct |
114 ms |
45544 KB |
Output is correct |
102 |
Correct |
115 ms |
51792 KB |
Output is correct |
103 |
Correct |
9 ms |
32088 KB |
Output is correct |
104 |
Correct |
8 ms |
32092 KB |
Output is correct |
105 |
Correct |
8 ms |
31836 KB |
Output is correct |
106 |
Correct |
8 ms |
31836 KB |
Output is correct |
107 |
Correct |
8 ms |
31836 KB |
Output is correct |
108 |
Correct |
567 ms |
101572 KB |
Output is correct |
109 |
Correct |
1002 ms |
116404 KB |
Output is correct |
110 |
Correct |
1020 ms |
129620 KB |
Output is correct |
111 |
Correct |
1063 ms |
141136 KB |
Output is correct |
112 |
Correct |
898 ms |
124320 KB |
Output is correct |
113 |
Correct |
594 ms |
114740 KB |
Output is correct |
114 |
Correct |
681 ms |
94588 KB |
Output is correct |
115 |
Correct |
680 ms |
94800 KB |
Output is correct |
116 |
Correct |
787 ms |
97872 KB |
Output is correct |
117 |
Correct |
812 ms |
115080 KB |
Output is correct |
118 |
Correct |
681 ms |
95104 KB |
Output is correct |
119 |
Correct |
839 ms |
115356 KB |
Output is correct |
120 |
Correct |
966 ms |
131448 KB |
Output is correct |
121 |
Correct |
828 ms |
115136 KB |
Output is correct |
122 |
Correct |
810 ms |
101824 KB |
Output is correct |
123 |
Correct |
600 ms |
118172 KB |
Output is correct |
124 |
Correct |
1027 ms |
107420 KB |
Output is correct |