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Submission #1093134

# Submission time Handle Problem Language Result Execution time Memory
1093134 2024-09-26T02:25:17 Z Jawad_Akbar_JJ Village (BOI20_village) C++17
100 / 100
 93 ms 24404 KB 
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
const int N = 1e5 + 10;
vector<int> nei[N], lst;
int Num[N], Num2[N], ch[N], n;
long long Mx = 0, Mn = 0;

void dfs(int u, int p){
	ch[u] = 1;
	for (int i : nei[u]){
		if (i == p)
			continue;
		dfs(i, u);
		ch[u] += ch[i];
		Mx += min(n - ch[i], ch[i]);
	}
}
void dfs2(int u, int p){
	vector<int> vec = {u};
	for (int i : nei[u]){
		if (i == p)
			continue;
		dfs2(i, u);
		if (Num2[i] == i){
			int k = Num2[i];
			Num2[i] = vec.back();
			vec.push_back(k);
			Mn += 2;
		}
	}
	Num2[u] = vec.back();
	if (u == 1 and Num2[u] == 1)
		swap(Num2[u], Num2[nei[u][0]]), Mn += 2;
}

int find_cent(int u, int p){
	for (int i : nei[u])
		if (i != p and ch[i] * 2 > ch[1])
			return find_cent(i, u);
	return u;
}

void get(int u, int p){
	for (int i : nei[u])
		if (i != p)
			get(i, u);
	lst.push_back(u);
}
vector<int> get(int a, int b, int c){
	lst.clear();
	get(a, b);
	return lst;
}

void solve(){
	dfs(1, 1);
	dfs2(1, 1);
	int rt = find_cent(1, 1), ind = 0;
	dfs(rt, rt);

	vector<pair<int,int>> vec;
	for (int i : nei[rt])
		vec.push_back({ch[i], i});
	sort(rbegin(vec), rend(vec));

	vector<int> Vec =get(vec[0].second, rt, 1);
	for (int i=1;i<vec.size();i++){
		vector<int> v = get(vec[i].second, rt, 1);
		for (int j : v)
			Num[j] = Vec[ind++], Vec.push_back(j);
	}

	Vec.push_back(rt);
	Num[rt] = Vec[ind++];
	get(vec[0].second, rt, 1);
	for (int i : lst)
		Num[i] = Vec[ind++];
}

int main(){
	cin>>n;

	for (int i=1, a, b;i<n;i++){
		cin>>a>>b;
		nei[a].push_back(b);
		nei[b].push_back(a);
	}
	if (n == 1){
		cout<<1 / 0;
		return 0;
	}

	solve();

	cout<<Mn<<" "<<Mx<<'\n';
	for (int i=1;i<=n;i++)
		cout<<Num2[i]<<' ';
	cout<<'\n';
	for (int i=1;i<=n;i++)
		cout<<Num[i]<<' ';
	cout<<'\n';
}

Compilation message

Village.cpp: In function 'void solve()':
Village.cpp:70:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |  for (int i=1;i<vec.size();i++){
      |               ~^~~~~~~~~~~
Village.cpp: In function 'int main()':
Village.cpp:92:11: warning: division by zero [-Wdiv-by-zero]
   92 |   cout<<1 / 0;
      |         ~~^~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 2 ms 2648 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 1 ms 2788 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 2 ms 2648 KB Output is correct

Subtask #2
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 2 ms 2832 KB Output is correct
3 Correct 2 ms 2652 KB Output is correct
4 Correct 2 ms 2840 KB Output is correct
5 Correct 2 ms 2652 KB Output is correct
6 Correct 2 ms 2648 KB Output is correct
7 Correct 2 ms 2908 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 2 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 2 ms 2880 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 2 ms 2652 KB Output is correct
16 Correct 2 ms 2652 KB Output is correct
17 Correct 2 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 2 ms 2652 KB Output is correct
20 Correct 2 ms 2652 KB Output is correct
21 Correct 3 ms 2652 KB Output is correct
22 Correct 2 ms 2652 KB Output is correct
23 Correct 2 ms 2652 KB Output is correct
24 Correct 2 ms 2652 KB Output is correct
25 Correct 2 ms 2652 KB Output is correct
26 Correct 2 ms 2648 KB Output is correct
27 Correct 2 ms 2652 KB Output is correct
28 Correct 2 ms 2648 KB Output is correct
29 Correct 2 ms 2656 KB Output is correct
30 Correct 2 ms 2656 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 2 ms 2648 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 1 ms 2788 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 2 ms 2648 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 2 ms 2832 KB Output is correct
20 Correct 2 ms 2652 KB Output is correct
21 Correct 2 ms 2840 KB Output is correct
22 Correct 2 ms 2652 KB Output is correct
23 Correct 2 ms 2648 KB Output is correct
24 Correct 2 ms 2908 KB Output is correct
25 Correct 2 ms 2652 KB Output is correct
26 Correct 2 ms 2652 KB Output is correct
27 Correct 2 ms 2908 KB Output is correct
28 Correct 2 ms 2652 KB Output is correct
29 Correct 2 ms 2652 KB Output is correct
30 Correct 2 ms 2880 KB Output is correct
31 Correct 2 ms 2652 KB Output is correct
32 Correct 2 ms 2652 KB Output is correct
33 Correct 2 ms 2652 KB Output is correct
34 Correct 2 ms 2652 KB Output is correct
35 Correct 1 ms 2652 KB Output is correct
36 Correct 2 ms 2652 KB Output is correct
37 Correct 2 ms 2652 KB Output is correct
38 Correct 3 ms 2652 KB Output is correct
39 Correct 2 ms 2652 KB Output is correct
40 Correct 2 ms 2652 KB Output is correct
41 Correct 2 ms 2652 KB Output is correct
42 Correct 2 ms 2652 KB Output is correct
43 Correct 2 ms 2648 KB Output is correct
44 Correct 2 ms 2652 KB Output is correct
45 Correct 2 ms 2648 KB Output is correct
46 Correct 2 ms 2656 KB Output is correct
47 Correct 2 ms 2656 KB Output is correct
48 Correct 65 ms 8712 KB Output is correct
49 Correct 70 ms 9328 KB Output is correct
50 Correct 72 ms 9452 KB Output is correct
51 Correct 66 ms 8064 KB Output is correct
52 Correct 69 ms 9600 KB Output is correct
53 Correct 65 ms 8932 KB Output is correct
54 Correct 50 ms 12884 KB Output is correct
55 Correct 93 ms 24404 KB Output is correct
56 Correct 89 ms 16588 KB Output is correct
57 Correct 81 ms 14152 KB Output is correct
58 Correct 84 ms 12160 KB Output is correct
59 Correct 71 ms 10068 KB Output is correct
60 Correct 69 ms 10036 KB Output is correct
61 Correct 58 ms 10012 KB Output is correct
62 Correct 65 ms 10092 KB Output is correct
63 Correct 58 ms 9616 KB Output is correct
64 Correct 72 ms 9968 KB Output is correct
65 Correct 56 ms 10272 KB Output is correct
66 Correct 52 ms 9884 KB Output is correct
67 Correct 44 ms 8068 KB Output is correct
68 Correct 49 ms 8908 KB Output is correct
69 Correct 55 ms 10100 KB Output is correct
70 Correct 57 ms 9724 KB Output is correct
71 Correct 39 ms 8052 KB Output is correct
72 Correct 50 ms 8512 KB Output is correct
73 Correct 60 ms 10148 KB Output is correct
74 Correct 50 ms 9580 KB Output is correct
75 Correct 72 ms 9648 KB Output is correct
76 Correct 67 ms 9584 KB Output is correct
77 Correct 62 ms 9824 KB Output is correct
78 Correct 44 ms 7336 KB Output is correct
79 Correct 53 ms 8320 KB Output is correct
80 Correct 70 ms 9652 KB Output is correct
81 Correct 64 ms 9920 KB Output is correct
82 Correct 69 ms 9952 KB Output is correct