// Judges with GCC >= 12 only needs Ofast
// #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize")
// MLE optimization
// #pragma GCC optimize("conserve-stack")
// Old judges
// #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2")
// New judges. Test with assert(__builtin_cpu_supports("avx2"));
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native")
// Atcoder
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma")
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
- insert(x)
- find_by_order(k): return iterator to the k-th smallest element
- order_of_key(x): the number of elements that are strictly smaller
*/
#include<bits/stdc++.h>
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
uniform_real_distribution<> pp(0.0,1.0);
//#define int long long
#define ld long double
#define pii pair<int,int>
#define piii pair<int,pii>
#define fi first
#define se second
const int inf=1e9;
const int mod=998244353;
const int maxn=200005;
const int bl=650;
const int maxs=650;
const int maxm=200005;
const int maxq=500005;
const int maxl=20;
const int maxa=1000000;
const int root=3;
const int base=101;
void solve(){
//Input
int n;cin >> n;
vector<vector<pii>> edge(n+1);
vector<int> child(n+1,0),dep(n+1,0),Max(n+1,0);
vector<bool> used(n+1,false);
for(int i=1;i<n;i++){
int u,v;cin >> u >> v;
edge[u].push_back({v,0});
edge[v].push_back({u,0});
}
//Pre_dfs
function<void(int,int)> dfs_sz = [&](int u,int par){
child[u]=1;
for(auto &[v,w]:edge[u]){
if(v==par) continue;
dfs_sz(v,u);child[u]+=child[v];
w=n-child[v];
}
for(auto &[v,w]:edge[u]){
if(v==par) w=child[u];
}
};
dfs_sz(1,0);
{//Centroid Decomposition
int sz;
vector<piii> ver;
function<void(int,int)> dfs = [&](int u,int par){
child[u]=1;
for(auto [v,w]:edge[u]){
if(v==par || used[v]) continue;
dfs(v,u);child[u]+=child[v];
}
};
function<int(int,int)> findcen = [&](int u,int par){
for(auto [v,w]:edge[u]){
if(v==par || used[v]) continue;
if(child[v]>sz/2) return findcen(v,u);
}
return u;
};
function<void(int,int,int,int)> cal = [&](int u,int par,int anc,int s){
int num=-1;dep[u]=dep[par]+1;
for(auto [v,w]:edge[u]){
if(used[v]) continue;
if(v==par){num=w;continue;}
cal(v,u,anc,s);
}
ver.push_back({num,{dep[u],anc}});
Max[2*min(s,num)]=max(Max[2*min(s,num)],dep[u]);
};
function<void(int)> decompose = [&](int u){
dfs(u,0);sz=child[u];
int cen=findcen(u,0);
ver.clear();dep[cen]=0;
for(auto [v,w]:edge[cen]){
if(used[v]) continue;
cal(v,cen,v,w);
}
pii Max1={-inf,-1},Max2={-inf,-1};
sort(ver.begin(),ver.end(),greater<piii>());
for(auto [sz,p]:ver){
if(Max1.se!=p.se) Max[2*sz]=max(Max[2*sz],p.fi+Max1.fi);
else Max[2*sz]=max(Max[2*sz],p.fi+Max2.fi);
if(p.se==Max1.se) Max1=max(Max1,p);
else if(p.se==Max2.se){
Max2=max(Max2,p);
if(Max2.fi>Max1.fi) swap(Max2,Max1);
}
else if(p>Max1) Max2=Max1,Max1=p;
else if(p>Max2) Max2=p;
}
used[cen]=true;
for(auto [v,w]:edge[cen]){
if(used[v]) continue;
decompose(v);
}
};
decompose(1);
}
for(int i=1;i<=n;i++) cout << Max[i]+1 << '\n';
}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);cout.tie(NULL);
int test=1;//cin >> test;
while(test--) solve();
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
320 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
320 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
320 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
