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Submission #1093132

# Submission time Handle Problem Language Result Execution time Memory
1093132 2024-09-26T02:16:12 Z Jawad_Akbar_JJ Village (BOI20_village) C++17
50 / 100
 82 ms 20676 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, int c = 0){
	ch[u] = 1;
	for (int i : nei[u]){
		if (i == p)
			continue;
		dfs(i, u, c);
		ch[u] += ch[i];
		Mx += min(n - ch[i], ch[i]);
	}
	if (c == 0)
		return;
	vector<int> vec = {u};
	for (int i : nei[u]){
		if (i == p)
			continue;
		if (Num2[i] == i or (u == 1 and vec.size() == 1)){
			int k = Num2[i];
			Num2[i] = vec.back();
			vec.push_back(k);
		}
	}
	Num2[u] = vec.back();
	Mn += (vec.size() - 1) * 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, 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:66:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |  for (int i=1;i<vec.size();i++){
      |               ~^~~~~~~~~~~
Village.cpp: In function 'int main()':
Village.cpp:88:11: warning: division by zero [-Wdiv-by-zero]
   88 |   cout<<1 / 0;
      |         ~~^~~

Subtask #1
6.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2648 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 Partially correct 1 ms 2652 KB Partially correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 2 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 1 ms 2648 KB Output is correct
13 Partially correct 1 ms 2652 KB Partially correct
14 Correct 1 ms 2652 KB Output is correct
15 Partially correct 2 ms 2652 KB Partially correct
16 Partially correct 1 ms 2652 KB Partially correct
17 Correct 1 ms 2652 KB Output is correct

Subtask #2
19.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2652 KB Output is correct
2 Correct 2 ms 2652 KB Output is correct
3 Correct 2 ms 2652 KB Output is correct
4 Correct 2 ms 2652 KB Output is correct
5 Correct 2 ms 2652 KB Output is correct
6 Partially correct 2 ms 2652 KB Partially correct
7 Partially correct 2 ms 2908 KB Partially correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 2 ms 2652 KB Output is correct
11 Correct 2 ms 2804 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 2 ms 2648 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Partially correct 2 ms 2652 KB Partially correct
17 Correct 2 ms 2652 KB Output is correct
18 Correct 2 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 2 ms 2652 KB Output is correct
22 Correct 2 ms 2652 KB Output is correct
23 Correct 1 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 2652 KB Output is correct
27 Correct 2 ms 2744 KB Output is correct
28 Correct 2 ms 2652 KB Output is correct
29 Correct 1 ms 2652 KB Output is correct
30 Partially correct 2 ms 2652 KB Partially correct

Subtask #3
25.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2648 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 Partially correct 1 ms 2652 KB Partially correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 2 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 1 ms 2648 KB Output is correct
13 Partially correct 1 ms 2652 KB Partially correct
14 Correct 1 ms 2652 KB Output is correct
15 Partially correct 2 ms 2652 KB Partially correct
16 Partially correct 1 ms 2652 KB Partially correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 2 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 2 ms 2652 KB Output is correct
22 Correct 2 ms 2652 KB Output is correct
23 Partially correct 2 ms 2652 KB Partially correct
24 Partially correct 2 ms 2908 KB Partially correct
25 Correct 2 ms 2652 KB Output is correct
26 Correct 2 ms 2652 KB Output is correct
27 Correct 2 ms 2652 KB Output is correct
28 Correct 2 ms 2804 KB Output is correct
29 Correct 2 ms 2652 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 2 ms 2648 KB Output is correct
32 Correct 1 ms 2652 KB Output is correct
33 Partially correct 2 ms 2652 KB Partially correct
34 Correct 2 ms 2652 KB Output is correct
35 Correct 2 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 2 ms 2652 KB Output is correct
39 Correct 2 ms 2652 KB Output is correct
40 Correct 1 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 2652 KB Output is correct
44 Correct 2 ms 2744 KB Output is correct
45 Correct 2 ms 2652 KB Output is correct
46 Correct 1 ms 2652 KB Output is correct
47 Partially correct 2 ms 2652 KB Partially correct
48 Partially correct 62 ms 8148 KB Partially correct
49 Correct 82 ms 8564 KB Output is correct
50 Correct 63 ms 8472 KB Output is correct
51 Correct 50 ms 7148 KB Output is correct
52 Partially correct 62 ms 8528 KB Partially correct
53 Correct 57 ms 8000 KB Output is correct
54 Partially correct 39 ms 11440 KB Partially correct
55 Correct 81 ms 20676 KB Output is correct
56 Correct 74 ms 14400 KB Output is correct
57 Correct 74 ms 12348 KB Output is correct
58 Correct 70 ms 10672 KB Output is correct
59 Correct 65 ms 8872 KB Output is correct
60 Correct 76 ms 9036 KB Output is correct
61 Correct 58 ms 8760 KB Output is correct
62 Correct 66 ms 9068 KB Output is correct
63 Correct 55 ms 8588 KB Output is correct
64 Correct 71 ms 8784 KB Output is correct
65 Correct 61 ms 8992 KB Output is correct
66 Correct 53 ms 8856 KB Output is correct
67 Correct 48 ms 7504 KB Output is correct
68 Correct 51 ms 8140 KB Output is correct
69 Correct 59 ms 9160 KB Output is correct
70 Correct 57 ms 8728 KB Output is correct
71 Correct 47 ms 7216 KB Output is correct
72 Correct 51 ms 7668 KB Output is correct
73 Correct 58 ms 9128 KB Output is correct
74 Correct 62 ms 8692 KB Output is correct
75 Correct 66 ms 8376 KB Output is correct
76 Correct 66 ms 8560 KB Output is correct
77 Correct 58 ms 8640 KB Output is correct
78 Correct 42 ms 6568 KB Output is correct
79 Correct 50 ms 7304 KB Output is correct
80 Correct 69 ms 8372 KB Output is correct
81 Correct 59 ms 8700 KB Output is correct
82 Correct 58 ms 8728 KB Output is correct