oj.uz

Submission #654914

# Submission time Handle Problem Language Result Execution time Memory
654914 2022-11-02T00:39:53 Z inksamurai Village (BOI20_village) C++17
50 / 100
 138 ms 27544 KB 
#include <bits/stdc++.h>
#define int ll
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3fm6nhZ ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}

#define all(a) a.begin(),a.end()

signed main(){
_3fm6nhZ;
	int n;
	cin>>n;
	vec(vi) adj(n);
	rep(i,n-1){
		int u,v;
		cin>>u>>v;
		u-=1,v-=1;
		adj[u].pb(v);
		adj[v].pb(u);
	}
	int ans=0;
	vi ert(n);
	auto dfs=[&](auto self,int v,int par)->int{
		vi rbts;
		for(auto u:adj[v]){
			if(u==par) continue;
			int e=self(self,u,v);
			if(e) rbts.pb(u);
		}
		if(sz(rbts)==0) return 1;
		for(int i=0;i<sz(rbts)-sz(rbts)%2;i+=2){
			ert[rbts[i]]=rbts[i+1];
			ert[rbts[i+1]]=rbts[i];
			ans+=4;
		}
		if(sz(rbts)%2){
			ert[v]=rbts.back();
			ert[rbts.back()]=v;
			ans+=2;
		}else{
			ert[v]=rbts.back();
			ert[ert[rbts.back()]]=v;
		}
		return 0;
	};
	int e=dfs(dfs,0,-1);
	if(e){
		int v=0;
		int u=adj[0][0];
		ans+=2;
		rep(s,n){
			if(ert[s]==u){
				ert[v]=u;
				ert[s]=0;
				break;
			}
		}
	}
	int ans1=0;
	vi chs(n);
	auto pre_rfs=[&](auto self,int v,int par)->void{
		chs[v]=1;
		for(auto u:adj[v]){
			if(u==par) continue;
			self(self,u,v);
			chs[v]+=chs[u];
			ans1+=2*min(chs[u],n-chs[u]);
		}
	};
	pre_rfs(pre_rfs,0,-1);
	auto rfs=[&](auto self,int v,int par)->int{
		for(auto u:adj[v]){
			if(u==par) continue;
			if(2*chs[u]>=n){
				return self(self,u,v);
			}
		}
		return v;
	};
	int rt=rfs(rfs,0,-1);
	chs=vi(n,0);
	ans1=0;
	pre_rfs(pre_rfs,rt,-1);
	vi rbts;
	auto add=[&](auto self,int v,int par)->void{
		rbts.pb(v);
		for(auto u:adj[v]){
			if(u==par) continue;
			self(self,u,v);
		}
	};
	vi delay={rt};
	vi usd(n,0);
	vi ert1(n);
	auto ask=[&](auto self,int v,int par)->void{
		// print(v,sz(rbts)+sz(delay));
		// assert(sz(rbts)+sz(delay));
		if(sz(delay)){
			int s=delay.back();
			ert1[s]=v;
			delay.pop_back();
		}else{
			int s=rbts.back();
			usd[s]=1;
			ert1[s]=v;
			rbts.pop_back();
		}
		for(auto u:adj[v]){
			if(u==par) continue;
			self(self,u,v);
		}
	};
	sort(all(adj[rt]),[&](int l,int r){
		return chs[l]<chs[r];
	});
	for(auto u:adj[rt]){
		add(add,u,rt);
	}
	per(i,sz(adj[rt])){
		int u=adj[rt][i];
		vi now;
		rep(_,chs[u]){
			if(!sz(rbts) or usd[rbts.back()]) continue;
			now.pb(rbts.back());
			rbts.pop_back();
		}
		ask(ask,u,rt);
		for(auto v:now){
			delay.pb(v);
		}
	}
	assert(sz(delay));
	ert1[delay.back()]=rt;
	cout<<ans<<" "<<ans1<<"\n";
	rep(i,n){
		cout<<ert[i]+1<<" ";
	}
	print();
	rep(i,n){
		cout<<ert1[i]+1<<" ";
	}
}

Subtask #1
6.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Partially correct 1 ms 212 KB Partially correct
3 Correct 0 ms 212 KB Output is correct
4 Partially correct 0 ms 212 KB Partially correct
5 Correct 0 ms 212 KB Output is correct
6 Partially correct 0 ms 212 KB Partially correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Partially correct 0 ms 212 KB Partially correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Partially correct 0 ms 212 KB Partially correct

Subtask #2
19.0 / 38.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 340 KB Partially correct
2 Correct 1 ms 340 KB Output is correct
3 Partially correct 1 ms 340 KB Partially correct
4 Partially correct 1 ms 340 KB Partially correct
5 Partially correct 1 ms 340 KB Partially correct
6 Partially correct 1 ms 340 KB Partially correct
7 Correct 1 ms 468 KB Output is correct
8 Partially correct 1 ms 340 KB Partially correct
9 Partially correct 1 ms 340 KB Partially correct
10 Partially correct 1 ms 468 KB Partially correct
11 Partially correct 1 ms 468 KB Partially correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Partially correct 1 ms 340 KB Partially correct
15 Partially correct 1 ms 340 KB Partially correct
16 Correct 1 ms 340 KB Output is correct
17 Partially correct 1 ms 340 KB Partially correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Partially correct 1 ms 340 KB Partially correct
22 Partially correct 1 ms 340 KB Partially correct
23 Partially correct 1 ms 340 KB Partially correct
24 Partially correct 1 ms 340 KB Partially correct
25 Correct 1 ms 340 KB Output is correct
26 Partially correct 1 ms 340 KB Partially correct
27 Partially correct 1 ms 340 KB Partially correct
28 Partially correct 1 ms 340 KB Partially correct
29 Partially correct 1 ms 340 KB Partially correct
30 Partially correct 1 ms 340 KB Partially correct

Subtask #3
25.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Partially correct 1 ms 212 KB Partially correct
3 Correct 0 ms 212 KB Output is correct
4 Partially correct 0 ms 212 KB Partially correct
5 Correct 0 ms 212 KB Output is correct
6 Partially correct 0 ms 212 KB Partially correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Partially correct 0 ms 212 KB Partially correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Partially correct 0 ms 212 KB Partially correct
18 Partially correct 1 ms 340 KB Partially correct
19 Correct 1 ms 340 KB Output is correct
20 Partially correct 1 ms 340 KB Partially correct
21 Partially correct 1 ms 340 KB Partially correct
22 Partially correct 1 ms 340 KB Partially correct
23 Partially correct 1 ms 340 KB Partially correct
24 Correct 1 ms 468 KB Output is correct
25 Partially correct 1 ms 340 KB Partially correct
26 Partially correct 1 ms 340 KB Partially correct
27 Partially correct 1 ms 468 KB Partially correct
28 Partially correct 1 ms 468 KB Partially correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Partially correct 1 ms 340 KB Partially correct
32 Partially correct 1 ms 340 KB Partially correct
33 Correct 1 ms 340 KB Output is correct
34 Partially correct 1 ms 340 KB Partially correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Partially correct 1 ms 340 KB Partially correct
39 Partially correct 1 ms 340 KB Partially correct
40 Partially correct 1 ms 340 KB Partially correct
41 Partially correct 1 ms 340 KB Partially correct
42 Correct 1 ms 340 KB Output is correct
43 Partially correct 1 ms 340 KB Partially correct
44 Partially correct 1 ms 340 KB Partially correct
45 Partially correct 1 ms 340 KB Partially correct
46 Partially correct 1 ms 340 KB Partially correct
47 Partially correct 1 ms 340 KB Partially correct
48 Partially correct 69 ms 11800 KB Partially correct
49 Correct 83 ms 12996 KB Output is correct
50 Partially correct 83 ms 12888 KB Partially correct
51 Partially correct 54 ms 9972 KB Partially correct
52 Partially correct 85 ms 12396 KB Partially correct
53 Partially correct 95 ms 11540 KB Partially correct
54 Correct 39 ms 13300 KB Output is correct
55 Correct 138 ms 27544 KB Output is correct
56 Partially correct 109 ms 19940 KB Partially correct
57 Partially correct 105 ms 17508 KB Partially correct
58 Partially correct 96 ms 15316 KB Partially correct
59 Partially correct 79 ms 13116 KB Partially correct
60 Correct 53 ms 12588 KB Output is correct
61 Partially correct 56 ms 12608 KB Partially correct
62 Correct 58 ms 13256 KB Output is correct
63 Partially correct 54 ms 12396 KB Partially correct
64 Partially correct 64 ms 12864 KB Partially correct
65 Correct 62 ms 13628 KB Output is correct
66 Correct 55 ms 12108 KB Output is correct
67 Partially correct 46 ms 9752 KB Partially correct
68 Partially correct 50 ms 11192 KB Partially correct
69 Partially correct 61 ms 13424 KB Partially correct
70 Correct 53 ms 12296 KB Output is correct
71 Partially correct 37 ms 9096 KB Partially correct
72 Partially correct 42 ms 10556 KB Partially correct
73 Correct 72 ms 13380 KB Output is correct
74 Partially correct 52 ms 12032 KB Partially correct
75 Partially correct 86 ms 13212 KB Partially correct
76 Partially correct 73 ms 12744 KB Partially correct
77 Correct 78 ms 12880 KB Output is correct
78 Correct 39 ms 8520 KB Output is correct
79 Partially correct 52 ms 10148 KB Partially correct
80 Partially correct 90 ms 13312 KB Partially correct
81 Partially correct 64 ms 12780 KB Partially correct
82 Partially correct 61 ms 12604 KB Partially correct