#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef vector<ll> vi;
typedef vector<vector<ll>> vvi;
typedef pair<ll,ll> pi;
typedef map<ll,ll> mi;
typedef long double ld;
typedef vector<ld> vd;
typedef vector<vector<ld>> vvd;
typedef pair<ld,ld> pd;
#define ff first
#define ss second
#define srt(a) sort(a.begin(),a.end());
#define fip(k, n) for (ll i = k; i < n; i++)
#define fjp(k, n) for (ll j = k; j < n; j++)
#define fin(k, n) for (ll i = k; i >= n; i--)
#define fjn(k, n) for (ll j = k; j >= n; j--)
#define fp(k, n, m) for (ll k = n; k < m; k++)
#define fn(k, n, m) for (ll k = n; k >= m; k--)
#define ordered_set tree<pi, null_type,less< pi >, rb_tree_tag,tree_order_statistics_node_update>
#define totalOne(n) __builtin_popcount(n)
#define backZero(n) __builtin_ctzll(n)
#define frontZero(n) __builtin_clzll(n)
#define fx(k) for ( auto x : k )
#define test ll t;cin >> t;while (t--)
#define nli "\n"
// ==========================(debug)============================================================================================== //
#ifndef ONLINE_JUDGE
#define debug(x) cerr << #x <<" "; _printn(x); cerr << nli;
#else
#define debug(x)
#endif
void _printn(ll x){ cerr<<x<<" "; }
void _printn(int x){ cerr<<x<<" "; }
void _printn(ld x){ cerr<<x<<" "; }
void _printn(double x){ cerr<<x<<" "; }
void _printn(string x){ cerr<<x<<" "; }
void _printn(char x){ cerr<<x<<" "; }
void _printn(bool x){ cerr<<x<<" "; }
template<class T,class V>void _printn(pair<T,V> vv);
template<class T> void _printn(vector<T> vv);
template<class T> void _printn(set<T> vv);
template<class T,class V> void _printn(map<T,V> vv);
template<class T> void _printn(multiset<T> vv);
template<class T,class V>void _printn(pair<T,V> vv){ cerr<<"( ";_printn(vv.ff);cerr<<",";_printn(vv.ss);cerr<<")";}
template<class T> void _printn(vector<T> vv){ cerr<<"[ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"]"; };
template<class T> void _printn(set<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T> void _printn(multiset<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T,class V> void _printn(map<T,V> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
// ==========================(debug)============================================================================================== //
ll n,m,tp,tp2,res,cnt,sum,tptp,ans;
const ll mx = 5e5+5;
const ll mod = 1e9+7;
// ==========================(MOD)=============================================================================================== //
ll mod_add(ll aa,ll bb){ return ((aa%mod)+(bb%mod))%mod; }
ll mod_minus(ll aa,ll bb){ return (((aa%mod)-(bb%mod))+10*mod)%mod; }
ll mod_mul(ll aa,ll bb){ return ((aa%mod)*(bb%mod))%mod; }
ll mod_power(ll aa,ll bb){ aa%=mod; ll empowered = 1; bb%=mod-1; while(bb > 0){ if(bb & 1) empowered = mod_mul(empowered,aa); bb = bb >> 1; aa = mod_mul(aa,aa); } return empowered; }
ll mod_divi(ll aa,ll bb){ aa=mod_mul(aa,mod_power(bb,mod-2)); return aa; }
// ==========================(MOD)=============================================================================================== //
bool f = false;
ll a[mx];
vi adj[mx];
ll up[mx];
vi lis[mx];
bool is2[mx];
bool is[mx];
bool mark[mx];
bool cc[mx];
queue<ll> q;
ll sz[mx];
vi v;
void dfs(ll u,ll par){
v.push_back(u);
up[u] = par;
sz[u] = 1;
fx(adj[u])
if(x!=par && !mark[x]){
dfs(x,u);
sz[u] += sz[x];
}
return;
}
ll get(ll u,ll par,ll d){
fx(adj[u])
if(x!=par && !mark[x] && 2*sz[x]>d)
return get(x,u,d);
return u;
}
void divide(ll u){
dfs(u,u);
u = get(u,u,sz[u]);
v.clear();
dfs(u,u);
mark[u] = 1;
fx(v)
cc[x] = 1;
res = 0;
q.push(a[u]);
f = 1;
while(q.size()){
auto it = q.front();
q.pop();
if(is2[it])
continue;
is2[it] = 1;
res++;
fx(lis[it]){
is[x] = 1;
if(!cc[x]){
f = 0;
break;
}
if(a[up[x]] != a[x] && !is2[a[up[x]]])
q.push(a[up[x]]);
}
if(!f)
break;
}
if(f)
ans = min(ans,res-1);
fx(v){
cc[x] = 0;
is[x] = 0;
is2[a[x]] = 0;
}
fx(adj[u])
if(!mark[x])
divide(x);
return;
}
int main(){
ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
// #ifndef ONLINE_JUDGE
// freopen("input1.txt", "r", stdin);
// freopen("output1.txt", "w", stdout);
// freopen("error1.txt", "w", stderr);
// #endif // ONLINE_JUDGE
cin>>n>>m;
ll sr,de;
fip(0,n-1){
cin>>sr>>de;
adj[sr].push_back(de);
adj[de].push_back(sr);
}
fip(1,n+1) {
cin>>a[i];
lis[a[i]].push_back(i);
}
ans = 1e18;
divide(1);
cout<<ans<<nli;
cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n";
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
31068 KB |
Output is correct |
2 |
Correct |
6 ms |
31068 KB |
Output is correct |
3 |
Correct |
6 ms |
31068 KB |
Output is correct |
4 |
Correct |
7 ms |
31068 KB |
Output is correct |
5 |
Correct |
6 ms |
31064 KB |
Output is correct |
6 |
Correct |
6 ms |
31068 KB |
Output is correct |
7 |
Correct |
6 ms |
31068 KB |
Output is correct |
8 |
Correct |
6 ms |
31068 KB |
Output is correct |
9 |
Correct |
6 ms |
31176 KB |
Output is correct |
10 |
Correct |
6 ms |
31068 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
31068 KB |
Output is correct |
2 |
Correct |
6 ms |
31068 KB |
Output is correct |
3 |
Correct |
6 ms |
31068 KB |
Output is correct |
4 |
Correct |
7 ms |
31068 KB |
Output is correct |
5 |
Correct |
6 ms |
31064 KB |
Output is correct |
6 |
Correct |
6 ms |
31068 KB |
Output is correct |
7 |
Correct |
6 ms |
31068 KB |
Output is correct |
8 |
Correct |
6 ms |
31068 KB |
Output is correct |
9 |
Correct |
6 ms |
31176 KB |
Output is correct |
10 |
Correct |
6 ms |
31068 KB |
Output is correct |
11 |
Correct |
7 ms |
31324 KB |
Output is correct |
12 |
Correct |
7 ms |
31192 KB |
Output is correct |
13 |
Correct |
7 ms |
31324 KB |
Output is correct |
14 |
Correct |
7 ms |
31324 KB |
Output is correct |
15 |
Correct |
7 ms |
31324 KB |
Output is correct |
16 |
Correct |
7 ms |
31324 KB |
Output is correct |
17 |
Correct |
7 ms |
31324 KB |
Output is correct |
18 |
Correct |
7 ms |
31324 KB |
Output is correct |
19 |
Correct |
8 ms |
31732 KB |
Output is correct |
20 |
Correct |
7 ms |
31324 KB |
Output is correct |
21 |
Correct |
7 ms |
31324 KB |
Output is correct |
22 |
Correct |
7 ms |
31324 KB |
Output is correct |
23 |
Correct |
7 ms |
31572 KB |
Output is correct |
24 |
Correct |
7 ms |
31324 KB |
Output is correct |
25 |
Incorrect |
7 ms |
31324 KB |
Output isn't correct |
26 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
382 ms |
64916 KB |
Output is correct |
2 |
Correct |
168 ms |
69668 KB |
Output is correct |
3 |
Correct |
347 ms |
68796 KB |
Output is correct |
4 |
Correct |
157 ms |
69304 KB |
Output is correct |
5 |
Correct |
338 ms |
66500 KB |
Output is correct |
6 |
Correct |
165 ms |
69888 KB |
Output is correct |
7 |
Correct |
334 ms |
65184 KB |
Output is correct |
8 |
Correct |
147 ms |
69140 KB |
Output is correct |
9 |
Incorrect |
408 ms |
63940 KB |
Output isn't correct |
10 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
31068 KB |
Output is correct |
2 |
Correct |
6 ms |
31068 KB |
Output is correct |
3 |
Correct |
6 ms |
31068 KB |
Output is correct |
4 |
Correct |
7 ms |
31068 KB |
Output is correct |
5 |
Correct |
6 ms |
31064 KB |
Output is correct |
6 |
Correct |
6 ms |
31068 KB |
Output is correct |
7 |
Correct |
6 ms |
31068 KB |
Output is correct |
8 |
Correct |
6 ms |
31068 KB |
Output is correct |
9 |
Correct |
6 ms |
31176 KB |
Output is correct |
10 |
Correct |
6 ms |
31068 KB |
Output is correct |
11 |
Correct |
7 ms |
31324 KB |
Output is correct |
12 |
Correct |
7 ms |
31192 KB |
Output is correct |
13 |
Correct |
7 ms |
31324 KB |
Output is correct |
14 |
Correct |
7 ms |
31324 KB |
Output is correct |
15 |
Correct |
7 ms |
31324 KB |
Output is correct |
16 |
Correct |
7 ms |
31324 KB |
Output is correct |
17 |
Correct |
7 ms |
31324 KB |
Output is correct |
18 |
Correct |
7 ms |
31324 KB |
Output is correct |
19 |
Correct |
8 ms |
31732 KB |
Output is correct |
20 |
Correct |
7 ms |
31324 KB |
Output is correct |
21 |
Correct |
7 ms |
31324 KB |
Output is correct |
22 |
Correct |
7 ms |
31324 KB |
Output is correct |
23 |
Correct |
7 ms |
31572 KB |
Output is correct |
24 |
Correct |
7 ms |
31324 KB |
Output is correct |
25 |
Incorrect |
7 ms |
31324 KB |
Output isn't correct |
26 |
Halted |
0 ms |
0 KB |
- |