#include <bits/stdc++.h>
#define ll long long
#define s second
#define f first
#define pb push_back
#define pii pair <int,int>
#define left (h<<1),l,(l + r)/2
#define right ((h<<1)|1),(l + r)/2 + 1,r
// #define int ll
using namespace std;
const int N = 2e5 + 3;
int color[N],vis[N],centroid,f[N];
int tot[N],cnt[N],ans,parent[N];
vector <int> v[N],vec[N];
int dfs(int x,int par,int n,int dl){
// cout<<x<<" & "<<color[x]<<endl;
cnt[color[x]] += dl;
int s = 1;
for (int to: v[x]){
if (to == par || vis[to]) continue;
s += dfs(to,x,n,dl);
}
if (centroid == -1 && (par == -1 || s*2 >= n))
centroid = x;
return s;
}
void DFS(int x,int par){
parent[x] = par;
for (int to: v[x]){
if(to==par || vis[to]) continue;
DFS(to,x);
}
}
void go(int x,int n,int dep){
centroid = -1;
dfs(x,-1,n,1);
DFS(centroid,-1);
queue <int> q;
vector <int> rl;
q.push(color[centroid]);
rl.pb(color[centroid]);
f[color[centroid]] = 1;
int check = 1,add = 0;
while (q.size()){
int c = q.front(); q.pop();
add++;
if (tot[c] != cnt[c]) {check = 0; break;}
for (int x: vec[c]){
int p = parent[x];
if (p != -1 && color[p] != color[x] && !f[color[p]]){
f[color[p]] = 1;
rl.pb(color[p]);
q.push(color[p]);
}
}
}
for (int x: rl)
f[x] = 0;
if (check) ans=min(ans,add - 1);
dfs(x,-1,n,-1);
vis[centroid] = 1;
for (int to: v[centroid]){
if(!vis[to]) go(to,n/2,dep + 1);
}
}
signed main(){
ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
int n,k;
cin>>n>>k;
for (int i = 1; i < n; i++){
int a,b;
cin>>a>>b;
v[a].pb(b);
v[b].pb(a);
}
for (int i = 1; i <= n; i++){
cin >> color[i];
tot[color[i]]++;
vec[color[i]].pb(i);
}
ans = n;
go(1,n,1);
cout<<ans<<endl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
12892 KB |
Output is correct |
2 |
Correct |
3 ms |
12940 KB |
Output is correct |
3 |
Correct |
3 ms |
12892 KB |
Output is correct |
4 |
Correct |
3 ms |
12948 KB |
Output is correct |
5 |
Correct |
2 ms |
12892 KB |
Output is correct |
6 |
Correct |
3 ms |
12944 KB |
Output is correct |
7 |
Correct |
2 ms |
12892 KB |
Output is correct |
8 |
Correct |
3 ms |
12892 KB |
Output is correct |
9 |
Correct |
2 ms |
12892 KB |
Output is correct |
10 |
Correct |
3 ms |
12892 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
12892 KB |
Output is correct |
2 |
Correct |
3 ms |
12940 KB |
Output is correct |
3 |
Correct |
3 ms |
12892 KB |
Output is correct |
4 |
Correct |
3 ms |
12948 KB |
Output is correct |
5 |
Correct |
2 ms |
12892 KB |
Output is correct |
6 |
Correct |
3 ms |
12944 KB |
Output is correct |
7 |
Correct |
2 ms |
12892 KB |
Output is correct |
8 |
Correct |
3 ms |
12892 KB |
Output is correct |
9 |
Correct |
2 ms |
12892 KB |
Output is correct |
10 |
Correct |
3 ms |
12892 KB |
Output is correct |
11 |
Correct |
4 ms |
12892 KB |
Output is correct |
12 |
Correct |
4 ms |
12892 KB |
Output is correct |
13 |
Correct |
4 ms |
12892 KB |
Output is correct |
14 |
Correct |
4 ms |
12956 KB |
Output is correct |
15 |
Correct |
4 ms |
12892 KB |
Output is correct |
16 |
Correct |
4 ms |
12892 KB |
Output is correct |
17 |
Correct |
4 ms |
13148 KB |
Output is correct |
18 |
Correct |
5 ms |
12984 KB |
Output is correct |
19 |
Correct |
4 ms |
12956 KB |
Output is correct |
20 |
Correct |
3 ms |
13148 KB |
Output is correct |
21 |
Correct |
3 ms |
13148 KB |
Output is correct |
22 |
Correct |
3 ms |
13148 KB |
Output is correct |
23 |
Correct |
4 ms |
13148 KB |
Output is correct |
24 |
Correct |
5 ms |
12888 KB |
Output is correct |
25 |
Correct |
5 ms |
13148 KB |
Output is correct |
26 |
Correct |
4 ms |
13144 KB |
Output is correct |
27 |
Correct |
5 ms |
13148 KB |
Output is correct |
28 |
Correct |
5 ms |
13148 KB |
Output is correct |
29 |
Correct |
4 ms |
13144 KB |
Output is correct |
30 |
Correct |
4 ms |
13148 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
291 ms |
42716 KB |
Output is correct |
2 |
Correct |
158 ms |
43084 KB |
Output is correct |
3 |
Correct |
267 ms |
42188 KB |
Output is correct |
4 |
Correct |
149 ms |
43088 KB |
Output is correct |
5 |
Correct |
293 ms |
39476 KB |
Output is correct |
6 |
Correct |
153 ms |
43092 KB |
Output is correct |
7 |
Correct |
305 ms |
39880 KB |
Output is correct |
8 |
Correct |
151 ms |
42956 KB |
Output is correct |
9 |
Correct |
407 ms |
38228 KB |
Output is correct |
10 |
Correct |
385 ms |
35848 KB |
Output is correct |
11 |
Correct |
396 ms |
38548 KB |
Output is correct |
12 |
Correct |
440 ms |
41244 KB |
Output is correct |
13 |
Correct |
388 ms |
35664 KB |
Output is correct |
14 |
Correct |
383 ms |
41556 KB |
Output is correct |
15 |
Correct |
397 ms |
41312 KB |
Output is correct |
16 |
Correct |
422 ms |
36372 KB |
Output is correct |
17 |
Correct |
394 ms |
36752 KB |
Output is correct |
18 |
Correct |
361 ms |
36948 KB |
Output is correct |
19 |
Correct |
419 ms |
40276 KB |
Output is correct |
20 |
Correct |
407 ms |
42516 KB |
Output is correct |
21 |
Correct |
2 ms |
12892 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
12892 KB |
Output is correct |
2 |
Correct |
3 ms |
12940 KB |
Output is correct |
3 |
Correct |
3 ms |
12892 KB |
Output is correct |
4 |
Correct |
3 ms |
12948 KB |
Output is correct |
5 |
Correct |
2 ms |
12892 KB |
Output is correct |
6 |
Correct |
3 ms |
12944 KB |
Output is correct |
7 |
Correct |
2 ms |
12892 KB |
Output is correct |
8 |
Correct |
3 ms |
12892 KB |
Output is correct |
9 |
Correct |
2 ms |
12892 KB |
Output is correct |
10 |
Correct |
3 ms |
12892 KB |
Output is correct |
11 |
Correct |
4 ms |
12892 KB |
Output is correct |
12 |
Correct |
4 ms |
12892 KB |
Output is correct |
13 |
Correct |
4 ms |
12892 KB |
Output is correct |
14 |
Correct |
4 ms |
12956 KB |
Output is correct |
15 |
Correct |
4 ms |
12892 KB |
Output is correct |
16 |
Correct |
4 ms |
12892 KB |
Output is correct |
17 |
Correct |
4 ms |
13148 KB |
Output is correct |
18 |
Correct |
5 ms |
12984 KB |
Output is correct |
19 |
Correct |
4 ms |
12956 KB |
Output is correct |
20 |
Correct |
3 ms |
13148 KB |
Output is correct |
21 |
Correct |
3 ms |
13148 KB |
Output is correct |
22 |
Correct |
3 ms |
13148 KB |
Output is correct |
23 |
Correct |
4 ms |
13148 KB |
Output is correct |
24 |
Correct |
5 ms |
12888 KB |
Output is correct |
25 |
Correct |
5 ms |
13148 KB |
Output is correct |
26 |
Correct |
4 ms |
13144 KB |
Output is correct |
27 |
Correct |
5 ms |
13148 KB |
Output is correct |
28 |
Correct |
5 ms |
13148 KB |
Output is correct |
29 |
Correct |
4 ms |
13144 KB |
Output is correct |
30 |
Correct |
4 ms |
13148 KB |
Output is correct |
31 |
Correct |
291 ms |
42716 KB |
Output is correct |
32 |
Correct |
158 ms |
43084 KB |
Output is correct |
33 |
Correct |
267 ms |
42188 KB |
Output is correct |
34 |
Correct |
149 ms |
43088 KB |
Output is correct |
35 |
Correct |
293 ms |
39476 KB |
Output is correct |
36 |
Correct |
153 ms |
43092 KB |
Output is correct |
37 |
Correct |
305 ms |
39880 KB |
Output is correct |
38 |
Correct |
151 ms |
42956 KB |
Output is correct |
39 |
Correct |
407 ms |
38228 KB |
Output is correct |
40 |
Correct |
385 ms |
35848 KB |
Output is correct |
41 |
Correct |
396 ms |
38548 KB |
Output is correct |
42 |
Correct |
440 ms |
41244 KB |
Output is correct |
43 |
Correct |
388 ms |
35664 KB |
Output is correct |
44 |
Correct |
383 ms |
41556 KB |
Output is correct |
45 |
Correct |
397 ms |
41312 KB |
Output is correct |
46 |
Correct |
422 ms |
36372 KB |
Output is correct |
47 |
Correct |
394 ms |
36752 KB |
Output is correct |
48 |
Correct |
361 ms |
36948 KB |
Output is correct |
49 |
Correct |
419 ms |
40276 KB |
Output is correct |
50 |
Correct |
407 ms |
42516 KB |
Output is correct |
51 |
Correct |
2 ms |
12892 KB |
Output is correct |
52 |
Correct |
295 ms |
26128 KB |
Output is correct |
53 |
Correct |
308 ms |
26196 KB |
Output is correct |
54 |
Correct |
291 ms |
26136 KB |
Output is correct |
55 |
Correct |
311 ms |
26196 KB |
Output is correct |
56 |
Correct |
284 ms |
26056 KB |
Output is correct |
57 |
Correct |
278 ms |
25968 KB |
Output is correct |
58 |
Correct |
253 ms |
29896 KB |
Output is correct |
59 |
Correct |
243 ms |
30132 KB |
Output is correct |
60 |
Correct |
273 ms |
29268 KB |
Output is correct |
61 |
Correct |
276 ms |
29012 KB |
Output is correct |
62 |
Correct |
172 ms |
43072 KB |
Output is correct |
63 |
Correct |
167 ms |
43192 KB |
Output is correct |
64 |
Correct |
163 ms |
43088 KB |
Output is correct |
65 |
Correct |
165 ms |
43052 KB |
Output is correct |
66 |
Correct |
200 ms |
34548 KB |
Output is correct |
67 |
Correct |
230 ms |
34656 KB |
Output is correct |
68 |
Correct |
188 ms |
34508 KB |
Output is correct |
69 |
Correct |
206 ms |
34736 KB |
Output is correct |
70 |
Correct |
215 ms |
34480 KB |
Output is correct |
71 |
Correct |
177 ms |
34500 KB |
Output is correct |
72 |
Correct |
186 ms |
34640 KB |
Output is correct |
73 |
Correct |
215 ms |
34192 KB |
Output is correct |
74 |
Correct |
195 ms |
34716 KB |
Output is correct |
75 |
Correct |
177 ms |
34668 KB |
Output is correct |
76 |
Correct |
311 ms |
33752 KB |
Output is correct |
77 |
Correct |
290 ms |
31640 KB |
Output is correct |
78 |
Correct |
375 ms |
36948 KB |
Output is correct |
79 |
Correct |
361 ms |
34644 KB |
Output is correct |
80 |
Correct |
390 ms |
41968 KB |
Output is correct |
81 |
Correct |
349 ms |
38224 KB |
Output is correct |
82 |
Correct |
372 ms |
38740 KB |
Output is correct |
83 |
Correct |
372 ms |
35132 KB |
Output is correct |
84 |
Correct |
358 ms |
41148 KB |
Output is correct |
85 |
Correct |
362 ms |
39504 KB |
Output is correct |
86 |
Correct |
385 ms |
35088 KB |
Output is correct |
87 |
Correct |
334 ms |
36424 KB |
Output is correct |
88 |
Correct |
324 ms |
37576 KB |
Output is correct |
89 |
Correct |
298 ms |
33560 KB |
Output is correct |
90 |
Correct |
319 ms |
33360 KB |
Output is correct |
91 |
Correct |
303 ms |
35668 KB |
Output is correct |
92 |
Correct |
300 ms |
34436 KB |
Output is correct |
93 |
Correct |
299 ms |
33908 KB |
Output is correct |
94 |
Correct |
307 ms |
33464 KB |
Output is correct |
95 |
Correct |
331 ms |
34900 KB |
Output is correct |
96 |
Correct |
310 ms |
33620 KB |
Output is correct |
97 |
Correct |
345 ms |
35748 KB |
Output is correct |