#include "bits/stdc++.h"
using namespace std;
#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define ph push
#define f first
#define s second
#define cbr cerr << "hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ((ll)x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define btinpct(x) __builtin_popcountll((x))
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); //can be used by calling rng() or shuffle(A, A+n, rng)
inline long long rand(long long x, long long y) { return (rng() % (y+1-x)) + x; } //inclusivesss
string to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){if(a>b)swap(a,b);if(a==0)return b;return gcd(b%a,a);}
#define ll /*long long*/ int
#define ld long double
#define FOR(ii, ss, ee) for(ll ii = (ss); ii <= (ll)(ee); ++ii)
#define DEC(ii, ss, ee) for(ll ii = (ss); ii >= (ll)(ee); --ii)
typedef pair <ll, ll> pi; typedef pair <ll, pi> spi; typedef pair <pi, pi> dpi;
#define LLINF ((long long) 1e18)//1234567890987654321
#define INF 1234567890ll
// #define cerr if(0)cout
#define MAXN (200006)
ll n, m;
vector<int> v[MAXN];
int A[MAXN], p[MAXN];
bool F[MAXN];
ll fdist[MAXN], depth[MAXN];
void init(ll x,ll par) {
fdist[x]= depth[x]; p[x]=par;
for(auto i:v[x]) if(i^par) {
depth[i]=depth[x]+1; init(i, x);
fdist[x]=max(fdist[x], fdist[i]);
}
}
ll ans[MAXN];
bool can(set<pi,greater<pi>> s) {
if(s.empty()) return 1;
ll x = s.begin()->f;
ll times=1;
s.erase(s.begin());
for(auto i:s) {
if(i.f == x) ++ times;
}
return times==1;
}
void dfs(ll x,ll p,ll dist) {
ll cmp=-1;
for(auto i:v[x]) if(i^p) { if(!F[i]) cmp=max(cmp, fdist[i]-depth[x]); }
pi mx=pi(dist, 1);
for(auto i:v[x]) if(i^p) if(F[i]) {
fdist[i] -= depth[x];
if(fdist[i] > mx.f) mx.f=fdist[i], mx.s=1; else if(fdist[i]==mx.f) ++ mx.s;
fdist[i] += depth[x];
}
if(mx.f > cmp && mx.s == 1 && mx.f) { // can calc
ans[x] = 1;
}
set <pi,greater<pi>> s;
for(auto i:v[x])if(i^p){
fdist[i] -= depth[x];
s.ins(pi(fdist[i], i));
fdist[i] += depth[x];
while(s.size() > 3) s.erase(s.begin());
}
s.ins(pi(dist, x));
while(s.size() > 3) s.erase(s.begin());
ll o=s.size();
for(auto i:v[x])if(i^p){
if(s.begin()->s == i) s.erase(s.begin());
if(can(s)) dfs(i, x, max(dist,(s.size()?s.begin()->f:0))+1);
if(siz(s) ^ o) s.ins(pi(fdist[i]-depth[x], i));
}
}
int main()
{
FAST
cin>>n>>m;
FOR(i,0,n-2) {
ll a, b; cin>>a>>b;
v[a].eb(b), v[b].eb(a);
}
FOR(i,1,n) cin>>A[i];
init(1, 1);
FOR(i,1,n) {
pi ans=pi(0, 1);
for(auto j:v[i]) if(j^p[i]) {
if(fdist[j] > ans.f) ans.f=fdist[j], ans.s=1;
else if(fdist[j]==ans.f) ++ ans.s;
}
F[i] = (ans.s == 1);
}
dfs(1, 1, 0);
FOR(i,1,n) cout<<ans[i]<<"\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
5240 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
5112 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
116 ms |
12664 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
188 ms |
16588 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
5240 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
5112 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
