oj.uz

Submission #1088094

# Submission time Handle Problem Language Result Execution time Memory
1088094 2024-09-13T21:17:28 Z freedommo33 Village (BOI20_village) C++17
50 / 100
 86 ms 60092 KB 
#include <bits/stdc++.h>
typedef long long ll;
constexpr int M = 1e6+7;
using namespace std;
vector<vector<int>> g(M);
int paramin[M];
int paramax[M];
int par[M];
int sajz[M];
int kolor[M];
int odl[M];
vector<int> preorder;
vector<int> kolory[M];
void bfs(){
	queue<int> q;
	q.push(1);
	preorder.push_back(1);
	while(!q.empty()){
		int p = q.front();
		q.pop();
		for(auto i:g[p]) if(par[i] == 0 && par[p]!=i){
			q.push(i);
			par[i] = p;
			preorder.push_back(i);
		}
	}
}
void bfs2(int v){
	queue<int> q;
	q.push(v);
	while(!q.empty()){
		int p = q.front();
		q.pop();
		for(auto i:g[p]) if(i != v && odl[i]==0){
			odl[i] = odl[p] + 1;
			q.push(i);
		}
	}
}
int centroid = 0;
void dfs(int v){
	pair<int, int> maks = {0, 0};
	for(auto i:g[v]) if(i!=par[v]){
		if(sajz[i] > maks.first) maks = {sajz[i], i};
	}
	if(maks.first > sajz[1]/2) dfs(maks.second);
	else centroid = v;
}
void dfs2(int v, int k){
	kolor[v] = k;
	for(auto i:g[v]) if(i!=centroid && kolor[i]==0) dfs2(i, k);
}
bool czy(vector<int> a, vector<int> b) { return a.size() > b.size(); }
int main(){
	cin.tie(0)->sync_with_stdio(0);
	int n;
	cin>>n;
	for(int i=1; i<n; i++){
		int a, b;
		cin>>a>>b;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	bfs();
	reverse(preorder.begin(), preorder.end());
	int minwynik = 0;
	for(auto i:preorder){
		sajz[i] = 1;
		for(auto j:g[i]) if(j!=par[i]) sajz[i] += sajz[j];
		int last = 0;
		int p1 = 0, p2 = 0;
		for(auto j:g[i]) if(j!=par[i] && paramin[j]==0){
			if(last==0) last = j;
			else{	
				p1 = last, p2 = j;
				minwynik += 4;
				paramin[last] = j;
				paramin[j] = last;
				last = 0;
			}	
		}
		if(last!=0){
			minwynik += 2;
			paramin[i] = last;
			paramin[last] = i;
		}
		else{
			paramin[p1] = i;
			paramin[p2] = p1;
			paramin[i] = p2;
		}
	}
	if(paramin[1] == 0){
		int a = g[1][0], b = paramin[a];
		paramin[a] = 1;
		paramin[b] = a;
		paramin[1] = b;
		minwynik+=2;
	}
	dfs(1);
	int aktk = 0;
	for(auto i:g[centroid]) dfs2(i, ++aktk);
	for(int i=1; i<=n; i++) if(i!=centroid) kolory[kolor[i]].push_back(i);
	priority_queue<pair<int, int>> q;
	for(int i=1; i<=aktk; i++){
		//cout<<kolory[i].size()<<" "<<i<<endl;
		q.push({kolory[i].size(), i});
	}
	bfs2(centroid);
	//for(int i=1; i<=n; i++) cout<<i<<": "<<odl[i]<<endl;
	int makswyn = 0;
	while(q.size() > 1){
		pair<int, int> a = q.top();
		q.pop();
		pair<int, int> b = q.top();
		q.pop();
		int aa = kolory[a.second].back();
		kolory[a.second].pop_back();
		int bb = kolory[b.second].back();
		kolory[b.second].pop_back();
		//cout<<"PARUJEMY: "<<aa<<" "<<bb<<endl;
		makswyn += (odl[aa] + odl[bb])*2;
		paramax[aa] = bb;
		paramax[bb] = aa;
		a.first--, b.first--;
		if(a.first) q.push(a);
		if(b.first) q.push(b);
	}
	if(!q.empty()){
		pair<int, int> a = q.top();
		q.pop();
		int aa = kolory[a.second].back();
		kolory[a.second].pop_back();
		//cout<<"PARUJEMY: "<<centroid<<" "<<aa<<endl;
		makswyn += odl[aa]*2;
		paramax[centroid] = aa;
		paramax[aa] = centroid;
	}
	if(paramax[centroid] == 0){
		int a = paramax[1];
		paramax[a] = centroid;
		paramax[centroid] = 1;
	}
	cout<<minwynik<<" "<<makswyn<<endl;
	for(int i=1; i<=n; i++) cout<<paramin[i]<<" ";
	cout<<endl;
	for(int i=1; i<=n; i++) cout<<paramax[i]<<" ";
	cout<<endl;
	return 0;
}

Subtask #1
6.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 47452 KB Output is correct
2 Correct 21 ms 47452 KB Output is correct
3 Correct 24 ms 47448 KB Output is correct
4 Partially correct 22 ms 47476 KB Partially correct
5 Correct 21 ms 47452 KB Output is correct
6 Correct 28 ms 47452 KB Output is correct
7 Correct 31 ms 47444 KB Output is correct
8 Partially correct 22 ms 47440 KB Partially correct
9 Correct 21 ms 47452 KB Output is correct
10 Correct 21 ms 47452 KB Output is correct
11 Correct 21 ms 47468 KB Output is correct
12 Correct 21 ms 47452 KB Output is correct
13 Correct 20 ms 47452 KB Output is correct
14 Partially correct 21 ms 47448 KB Partially correct
15 Correct 22 ms 47284 KB Output is correct
16 Correct 26 ms 47460 KB Output is correct
17 Correct 21 ms 47436 KB Output is correct

Subtask #2
19.0 / 38.0

# Verdict Execution time Memory Grader output
1 Partially correct 22 ms 47408 KB Partially correct
2 Correct 22 ms 47452 KB Output is correct
3 Partially correct 21 ms 47452 KB Partially correct
4 Correct 22 ms 47452 KB Output is correct
5 Correct 21 ms 47452 KB Output is correct
6 Correct 22 ms 47452 KB Output is correct
7 Correct 22 ms 47452 KB Output is correct
8 Correct 22 ms 47452 KB Output is correct
9 Correct 24 ms 47500 KB Output is correct
10 Correct 22 ms 47452 KB Output is correct
11 Correct 21 ms 47452 KB Output is correct
12 Partially correct 21 ms 47448 KB Partially correct
13 Correct 21 ms 47452 KB Output is correct
14 Correct 22 ms 47452 KB Output is correct
15 Partially correct 27 ms 47424 KB Partially correct
16 Correct 26 ms 47440 KB Output is correct
17 Correct 21 ms 47452 KB Output is correct
18 Partially correct 21 ms 47452 KB Partially correct
19 Partially correct 22 ms 47452 KB Partially correct
20 Correct 22 ms 47452 KB Output is correct
21 Partially correct 22 ms 47452 KB Partially correct
22 Partially correct 21 ms 47500 KB Partially correct
23 Correct 21 ms 47452 KB Output is correct
24 Correct 24 ms 47448 KB Output is correct
25 Correct 22 ms 47452 KB Output is correct
26 Correct 21 ms 47452 KB Output is correct
27 Partially correct 22 ms 47452 KB Partially correct
28 Correct 21 ms 47548 KB Output is correct
29 Partially correct 20 ms 47452 KB Partially correct
30 Correct 21 ms 47452 KB Output is correct

Subtask #3
25.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 47452 KB Output is correct
2 Correct 21 ms 47452 KB Output is correct
3 Correct 24 ms 47448 KB Output is correct
4 Partially correct 22 ms 47476 KB Partially correct
5 Correct 21 ms 47452 KB Output is correct
6 Correct 28 ms 47452 KB Output is correct
7 Correct 31 ms 47444 KB Output is correct
8 Partially correct 22 ms 47440 KB Partially correct
9 Correct 21 ms 47452 KB Output is correct
10 Correct 21 ms 47452 KB Output is correct
11 Correct 21 ms 47468 KB Output is correct
12 Correct 21 ms 47452 KB Output is correct
13 Correct 20 ms 47452 KB Output is correct
14 Partially correct 21 ms 47448 KB Partially correct
15 Correct 22 ms 47284 KB Output is correct
16 Correct 26 ms 47460 KB Output is correct
17 Correct 21 ms 47436 KB Output is correct
18 Partially correct 22 ms 47408 KB Partially correct
19 Correct 22 ms 47452 KB Output is correct
20 Partially correct 21 ms 47452 KB Partially correct
21 Correct 22 ms 47452 KB Output is correct
22 Correct 21 ms 47452 KB Output is correct
23 Correct 22 ms 47452 KB Output is correct
24 Correct 22 ms 47452 KB Output is correct
25 Correct 22 ms 47452 KB Output is correct
26 Correct 24 ms 47500 KB Output is correct
27 Correct 22 ms 47452 KB Output is correct
28 Correct 21 ms 47452 KB Output is correct
29 Partially correct 21 ms 47448 KB Partially correct
30 Correct 21 ms 47452 KB Output is correct
31 Correct 22 ms 47452 KB Output is correct
32 Partially correct 27 ms 47424 KB Partially correct
33 Correct 26 ms 47440 KB Output is correct
34 Correct 21 ms 47452 KB Output is correct
35 Partially correct 21 ms 47452 KB Partially correct
36 Partially correct 22 ms 47452 KB Partially correct
37 Correct 22 ms 47452 KB Output is correct
38 Partially correct 22 ms 47452 KB Partially correct
39 Partially correct 21 ms 47500 KB Partially correct
40 Correct 21 ms 47452 KB Output is correct
41 Correct 24 ms 47448 KB Output is correct
42 Correct 22 ms 47452 KB Output is correct
43 Correct 21 ms 47452 KB Output is correct
44 Partially correct 22 ms 47452 KB Partially correct
45 Correct 21 ms 47548 KB Output is correct
46 Partially correct 20 ms 47452 KB Partially correct
47 Correct 21 ms 47452 KB Output is correct
48 Correct 66 ms 55500 KB Output is correct
49 Partially correct 69 ms 56304 KB Partially correct
50 Partially correct 68 ms 56264 KB Partially correct
51 Correct 61 ms 54312 KB Output is correct
52 Correct 69 ms 56264 KB Output is correct
53 Partially correct 73 ms 55548 KB Partially correct
54 Correct 53 ms 52940 KB Output is correct
55 Partially correct 76 ms 58676 KB Partially correct
56 Partially correct 76 ms 57544 KB Partially correct
57 Correct 77 ms 57032 KB Output is correct
58 Correct 71 ms 56780 KB Output is correct
59 Correct 67 ms 56520 KB Output is correct
60 Partially correct 86 ms 60092 KB Partially correct
61 Partially correct 65 ms 57540 KB Partially correct
62 Partially correct 61 ms 56772 KB Partially correct
63 Partially correct 64 ms 56332 KB Partially correct
64 Partially correct 63 ms 56584 KB Partially correct
65 Partially correct 69 ms 56828 KB Partially correct
66 Partially correct 64 ms 56100 KB Partially correct
67 Correct 51 ms 54736 KB Output is correct
68 Partially correct 56 ms 55236 KB Partially correct
69 Correct 63 ms 56824 KB Output is correct
70 Correct 58 ms 56260 KB Output is correct
71 Correct 46 ms 53968 KB Output is correct
72 Correct 54 ms 54824 KB Output is correct
73 Correct 60 ms 56776 KB Output is correct
74 Correct 61 ms 56028 KB Output is correct
75 Partially correct 64 ms 56268 KB Partially correct
76 Correct 67 ms 56264 KB Output is correct
77 Correct 62 ms 56368 KB Output is correct
78 Partially correct 49 ms 53532 KB Partially correct
79 Correct 67 ms 54444 KB Output is correct
80 Partially correct 74 ms 56256 KB Partially correct
81 Correct 61 ms 56784 KB Output is correct
82 Partially correct 65 ms 56628 KB Partially correct