Submission #1356553

#TimeUsernameProblemLanguageResultExecution timeMemory
1356553WH8Village (BOI20_village)C++17
50 / 100
58 ms14176 KiB
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
using namespace std;
using namespace __gnu_pbds;
#define g0(x) get<0>(x)
#define g1(x) get<1>(x)
#define g2(x) get<2>(x)
#define mt make_tuple
#define mp make_pair
#define pb push_back
#define int long long 
#define f first
#define s second
#define pll pair<long long, long long>
#define iii tuple<int,int,int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()

signed main(){
	int n;cin>>n;
	vector<vector<int>> al(n+1);
	for(int i=0;i<n-1;i++){
		int a,b;cin>>a>>b;
		al[a].pb(b);
		al[b].pb(a);
	}
	vector<int> ss(n+1, 1);
	int mn=0, mx=0;
	vector<int> mncons(n+1, 0), mxcons(n+1, 0);
	auto dfs=[&](auto && dfs, int x, int p)->void{
		for(auto it : al[x]){
			if(it==p)continue;
			dfs(dfs, it, x);
			ss[x] += ss[it];
		}
		if(mncons[x] == 0){
			mn+=2;
			if(p==0){
				int ch=al[x][0];
				mncons[x]=mncons[ch];
				mncons[ch]=x;
			}
			else {
				if(mncons[p] == 0){
					mncons[x]=p;
					mncons[p]=x;
				}
				else {
					mncons[x]=mncons[p];
					mncons[p]=x;
				}
			}
		}
		mx += 2*min(n-ss[x], ss[x]);
	};
	dfs(dfs, 1, 0);
	cout<<mn<<" "<<mx<<'\n';
	for(int i=1;i<=n;i++) cout<<mncons[i]<<" "; cout<<'\n';
	for(int i=1;i<=n;i++) cout<<i<<" "; cout<<'\n';
}
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