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답안 #545360

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
545360 2022-04-04T10:51:44 Z tibinyte Parkovi (COCI22_parkovi) C++14
110 / 110
 1536 ms 44324 KB 
#include <bits/stdc++.h>
#define inf 1e16
using namespace std;
ifstream fin("geana.in");
ofstream fout("geana.out");
long long n, k;
vector<pair<long long, long long>> g[200001];
vector<int> sol;
long long deep[200001], closest[200001];
long long ans;
void dfs(long long node, long long parent, long long lim, long long cost, bool reconst) {
	closest[node] = inf;
	deep[node] = -inf;
	for (auto i : g[node]) {
		if (i.first != parent) {
			dfs(i.first, node, lim, i.second, reconst);
			deep[node] = max(deep[node], deep[i.first] + i.second);
			closest[node] = min(closest[node], closest[i.first] + i.second);
		}
	}
	if (closest[node] > lim && deep[node] < 0) {
		deep[node] = 0;
	}
	if (deep[node] + closest[node] <= lim) {
		deep[node] = -inf;
		return;
	}
	if (deep[node] + cost > lim || (node==1&&(deep[node] >= 0))) {
		if (reconst) {
			sol.push_back(node);
		}
		ans++;
		closest[node] = 0;
		deep[node] = -inf;
	}
}
int main() {
	cin.tie(nullptr)->sync_with_stdio(false);
	cin >> n >> k;
	for (long long i = 2; i <= n; ++i) {
		long long a, b, w;
		cin >> a >> b >> w;
		g[a].push_back({ b,w });
		g[b].push_back({ a,w });
	}
	long long st = 0, dr = inf;
	long long rep = 0;
	while (st <= dr) {
		long long mid = (st + dr) / 2;
		ans = 0;
		dfs(1, 0, mid, 0, 0);
		if (ans <= k) {
			rep = mid;
			dr = mid - 1;
		}
		else {
			st = mid + 1;
		}
	}
	cout << rep << '\n';
	dfs(1, 0, rep, 0, true);
	vector<bool> seen(n + 1);
	for (auto i : sol) {
		seen[i] = true;
	}
	for (int i = 1; i <= n; ++i) {
		if ((int)sol.size() == k) {
			break;
		}
		if (!seen[i]) {
			sol.push_back(i);
		}
	}
	for (auto i : sol) {
		cout << i << ' ';
	}
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 4 ms 4948 KB Output is correct
4 Correct 4 ms 5036 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 4 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5036 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5036 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 520 ms 37300 KB Output is correct
2 Correct 561 ms 42468 KB Output is correct
3 Correct 460 ms 21988 KB Output is correct
4 Correct 1536 ms 21724 KB Output is correct
5 Correct 1365 ms 21184 KB Output is correct
6 Correct 1391 ms 21212 KB Output is correct
7 Correct 1367 ms 20028 KB Output is correct
8 Correct 1480 ms 20832 KB Output is correct
9 Correct 1465 ms 21120 KB Output is correct
10 Correct 1449 ms 21512 KB Output is correct
11 Correct 970 ms 23724 KB Output is correct
12 Correct 965 ms 23676 KB Output is correct
13 Correct 1065 ms 25440 KB Output is correct
14 Correct 1053 ms 22160 KB Output is correct
15 Correct 1026 ms 21708 KB Output is correct
16 Correct 1073 ms 23212 KB Output is correct
17 Correct 1063 ms 22296 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 556 ms 38780 KB Output is correct
2 Correct 483 ms 42120 KB Output is correct
3 Correct 406 ms 40112 KB Output is correct
4 Correct 413 ms 40092 KB Output is correct
5 Correct 441 ms 43420 KB Output is correct
6 Correct 473 ms 42856 KB Output is correct
7 Correct 479 ms 44324 KB Output is correct
8 Correct 457 ms 42708 KB Output is correct
9 Correct 448 ms 42396 KB Output is correct
10 Correct 433 ms 41760 KB Output is correct
11 Correct 411 ms 40300 KB Output is correct
12 Correct 480 ms 44208 KB Output is correct
13 Correct 475 ms 44272 KB Output is correct
14 Correct 466 ms 43312 KB Output is correct
15 Correct 423 ms 40888 KB Output is correct
16 Correct 419 ms 39476 KB Output is correct
17 Correct 412 ms 39168 KB Output is correct
18 Correct 431 ms 41272 KB Output is correct
19 Correct 426 ms 41028 KB Output is correct
20 Correct 439 ms 41920 KB Output is correct
21 Correct 431 ms 41036 KB Output is correct

Subtask #4
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 4 ms 4948 KB Output is correct
4 Correct 4 ms 5036 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 4 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5036 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5036 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct
15 Correct 520 ms 37300 KB Output is correct
16 Correct 561 ms 42468 KB Output is correct
17 Correct 460 ms 21988 KB Output is correct
18 Correct 1536 ms 21724 KB Output is correct
19 Correct 1365 ms 21184 KB Output is correct
20 Correct 1391 ms 21212 KB Output is correct
21 Correct 1367 ms 20028 KB Output is correct
22 Correct 1480 ms 20832 KB Output is correct
23 Correct 1465 ms 21120 KB Output is correct
24 Correct 1449 ms 21512 KB Output is correct
25 Correct 970 ms 23724 KB Output is correct
26 Correct 965 ms 23676 KB Output is correct
27 Correct 1065 ms 25440 KB Output is correct
28 Correct 1053 ms 22160 KB Output is correct
29 Correct 1026 ms 21708 KB Output is correct
30 Correct 1073 ms 23212 KB Output is correct
31 Correct 1063 ms 22296 KB Output is correct
32 Correct 556 ms 38780 KB Output is correct
33 Correct 483 ms 42120 KB Output is correct
34 Correct 406 ms 40112 KB Output is correct
35 Correct 413 ms 40092 KB Output is correct
36 Correct 441 ms 43420 KB Output is correct
37 Correct 473 ms 42856 KB Output is correct
38 Correct 479 ms 44324 KB Output is correct
39 Correct 457 ms 42708 KB Output is correct
40 Correct 448 ms 42396 KB Output is correct
41 Correct 433 ms 41760 KB Output is correct
42 Correct 411 ms 40300 KB Output is correct
43 Correct 480 ms 44208 KB Output is correct
44 Correct 475 ms 44272 KB Output is correct
45 Correct 466 ms 43312 KB Output is correct
46 Correct 423 ms 40888 KB Output is correct
47 Correct 419 ms 39476 KB Output is correct
48 Correct 412 ms 39168 KB Output is correct
49 Correct 431 ms 41272 KB Output is correct
50 Correct 426 ms 41028 KB Output is correct
51 Correct 439 ms 41920 KB Output is correct
52 Correct 431 ms 41036 KB Output is correct
53 Correct 1341 ms 21580 KB Output is correct
54 Correct 1386 ms 22076 KB Output is correct
55 Correct 1501 ms 22852 KB Output is correct
56 Correct 1431 ms 22460 KB Output is correct
57 Correct 1396 ms 23188 KB Output is correct
58 Correct 1349 ms 21828 KB Output is correct
59 Correct 1437 ms 24452 KB Output is correct
60 Correct 1469 ms 21452 KB Output is correct
61 Correct 1276 ms 19868 KB Output is correct
62 Correct 1354 ms 20860 KB Output is correct
63 Correct 1448 ms 21408 KB Output is correct
64 Correct 1354 ms 22404 KB Output is correct
65 Correct 1465 ms 21648 KB Output is correct
66 Correct 1324 ms 22132 KB Output is correct
67 Correct 1313 ms 20700 KB Output is correct
68 Correct 1450 ms 23996 KB Output is correct
69 Correct 439 ms 42384 KB Output is correct
70 Correct 421 ms 39824 KB Output is correct
71 Correct 469 ms 43812 KB Output is correct
72 Correct 341 ms 20992 KB Output is correct
73 Correct 339 ms 20336 KB Output is correct
74 Correct 344 ms 22064 KB Output is correct
75 Correct 967 ms 24168 KB Output is correct
76 Correct 992 ms 23756 KB Output is correct
77 Correct 946 ms 23444 KB Output is correct
78 Correct 959 ms 23288 KB Output is correct