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답안 #696684

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
696684 2023-02-07T03:53:47 Z TranGiaHuy1508 Parkovi (COCI22_parkovi) C++17
110 / 110
 1358 ms 36376 KB 
#include <bits/stdc++.h>
using namespace std;

void main_program();

signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	main_program();
}

#define int long long
const int inf = 1e17;

int n, k, lim;
vector<vector<pair<int, int>>> adj;
vector<int> lst;

pair<int, int> dfs(int x, int p = -1, int wpar = 0){
	int maxw = 0, minb = inf;
	for (auto [y, w]: adj[x]){
		if (y == p) continue;
		auto sbt = dfs(y, x, w);
		maxw = max(maxw, sbt.first);
		minb = min(minb, sbt.second);
	}

	if (maxw + minb <= lim) return {0, minb + wpar};
	if (p != -1){
		if (maxw + wpar > lim){
			lst.push_back(x);
			return {0, wpar};
		}
	}
	else{
		lst.push_back(x);
		return {0, wpar};
	}
	return {maxw + wpar, minb + wpar};
}

bool check(int threshold){
	lst.clear();
	lim = threshold;
	dfs(0);
	return (int)lst.size() <= k;
}

void main_program(){
	cin >> n >> k;

	adj.resize(n);

	for (int i = 0; i < n-1; i++){
		int a, b, w; cin >> a >> b >> w;
		a--; b--;

		adj[a].emplace_back(b, w);
		adj[b].emplace_back(a, w);
	}

	int l = 0, r = 1e15;
	while (l < r){
		int mid = (l + r) >> 1;
		if (check(mid)) r = mid;
		else l = mid + 1;
	}

	check(l);
	cout << l << "\n";
	vector<int> mark(n);
	for (auto i: lst){
		mark[i] = 1; k--;
	}
	for (int i = 0; i < n; i++){
		if (!mark[i] && k){
			mark[i] = 1; k--;
		}
	}
	for (int i = 0; i < n; i++){
		if (mark[i]) cout << i+1 << " ";
	}
	cout << "\n";
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 232 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 278 ms 30260 KB Output is correct
2 Correct 296 ms 31148 KB Output is correct
3 Correct 238 ms 16820 KB Output is correct
4 Correct 1026 ms 16516 KB Output is correct
5 Correct 889 ms 16200 KB Output is correct
6 Correct 963 ms 16068 KB Output is correct
7 Correct 996 ms 16212 KB Output is correct
8 Correct 950 ms 16836 KB Output is correct
9 Correct 1056 ms 16616 KB Output is correct
10 Correct 1112 ms 16924 KB Output is correct
11 Correct 690 ms 17868 KB Output is correct
12 Correct 631 ms 17796 KB Output is correct
13 Correct 686 ms 19368 KB Output is correct
14 Correct 623 ms 17560 KB Output is correct
15 Correct 602 ms 17160 KB Output is correct
16 Correct 625 ms 17912 KB Output is correct
17 Correct 664 ms 17200 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 315 ms 31352 KB Output is correct
2 Correct 300 ms 30584 KB Output is correct
3 Correct 294 ms 29124 KB Output is correct
4 Correct 271 ms 29060 KB Output is correct
5 Correct 330 ms 32812 KB Output is correct
6 Correct 329 ms 32008 KB Output is correct
7 Correct 347 ms 33420 KB Output is correct
8 Correct 303 ms 31788 KB Output is correct
9 Correct 287 ms 31376 KB Output is correct
10 Correct 276 ms 30772 KB Output is correct
11 Correct 270 ms 29728 KB Output is correct
12 Correct 331 ms 33984 KB Output is correct
13 Correct 346 ms 33736 KB Output is correct
14 Correct 331 ms 32848 KB Output is correct
15 Correct 286 ms 30636 KB Output is correct
16 Correct 271 ms 29460 KB Output is correct
17 Correct 294 ms 29436 KB Output is correct
18 Correct 295 ms 30860 KB Output is correct
19 Correct 289 ms 32060 KB Output is correct
20 Correct 320 ms 32772 KB Output is correct
21 Correct 297 ms 31944 KB Output is correct

Subtask #4
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 232 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 278 ms 30260 KB Output is correct
16 Correct 296 ms 31148 KB Output is correct
17 Correct 238 ms 16820 KB Output is correct
18 Correct 1026 ms 16516 KB Output is correct
19 Correct 889 ms 16200 KB Output is correct
20 Correct 963 ms 16068 KB Output is correct
21 Correct 996 ms 16212 KB Output is correct
22 Correct 950 ms 16836 KB Output is correct
23 Correct 1056 ms 16616 KB Output is correct
24 Correct 1112 ms 16924 KB Output is correct
25 Correct 690 ms 17868 KB Output is correct
26 Correct 631 ms 17796 KB Output is correct
27 Correct 686 ms 19368 KB Output is correct
28 Correct 623 ms 17560 KB Output is correct
29 Correct 602 ms 17160 KB Output is correct
30 Correct 625 ms 17912 KB Output is correct
31 Correct 664 ms 17200 KB Output is correct
32 Correct 315 ms 31352 KB Output is correct
33 Correct 300 ms 30584 KB Output is correct
34 Correct 294 ms 29124 KB Output is correct
35 Correct 271 ms 29060 KB Output is correct
36 Correct 330 ms 32812 KB Output is correct
37 Correct 329 ms 32008 KB Output is correct
38 Correct 347 ms 33420 KB Output is correct
39 Correct 303 ms 31788 KB Output is correct
40 Correct 287 ms 31376 KB Output is correct
41 Correct 276 ms 30772 KB Output is correct
42 Correct 270 ms 29728 KB Output is correct
43 Correct 331 ms 33984 KB Output is correct
44 Correct 346 ms 33736 KB Output is correct
45 Correct 331 ms 32848 KB Output is correct
46 Correct 286 ms 30636 KB Output is correct
47 Correct 271 ms 29460 KB Output is correct
48 Correct 294 ms 29436 KB Output is correct
49 Correct 295 ms 30860 KB Output is correct
50 Correct 289 ms 32060 KB Output is correct
51 Correct 320 ms 32772 KB Output is correct
52 Correct 297 ms 31944 KB Output is correct
53 Correct 1167 ms 19736 KB Output is correct
54 Correct 1133 ms 20284 KB Output is correct
55 Correct 1194 ms 21216 KB Output is correct
56 Correct 1148 ms 20960 KB Output is correct
57 Correct 1032 ms 21972 KB Output is correct
58 Correct 1045 ms 19908 KB Output is correct
59 Correct 1358 ms 23560 KB Output is correct
60 Correct 1106 ms 19660 KB Output is correct
61 Correct 867 ms 18012 KB Output is correct
62 Correct 1002 ms 19524 KB Output is correct
63 Correct 1032 ms 19804 KB Output is correct
64 Correct 1035 ms 21332 KB Output is correct
65 Correct 1025 ms 19884 KB Output is correct
66 Correct 1006 ms 20568 KB Output is correct
67 Correct 893 ms 18700 KB Output is correct
68 Correct 1073 ms 23144 KB Output is correct
69 Correct 296 ms 34564 KB Output is correct
70 Correct 268 ms 32248 KB Output is correct
71 Correct 347 ms 36376 KB Output is correct
72 Correct 214 ms 19344 KB Output is correct
73 Correct 216 ms 19636 KB Output is correct
74 Correct 280 ms 21428 KB Output is correct
75 Correct 645 ms 21556 KB Output is correct
76 Correct 688 ms 21320 KB Output is correct
77 Correct 638 ms 20952 KB Output is correct
78 Correct 658 ms 21296 KB Output is correct