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Submission #1019690

# Submission time Handle Problem Language Result Execution time Memory
1019690 2024-07-11T07:29:59 Z aeg Parkovi (COCI22_parkovi) C++17
110 / 110
 429 ms 54956 KB 
#include <bits/stdc++.h>
constexpr int maxn =  1000010;
#define en cout << "\n";
#define int int64_t
constexpr int inf = 1e18;
using namespace std;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef vector<int> vi;
template <typename T1, typename T2>
void minimize(T1 &a, T2 b) {
	if (a > b) {
		a = b;
	}
}
template <typename T1, typename T2>
void maximize(T1 &a, T2 b) {
	if (a < b) {
		a = b;
	}
}
const int nsqrt = 450;
const int mod = 1e9 + 7;
int n, k;
vii ke[maxn];
bool covered[maxn], used[maxn];
int cnt, mid;
int dfs(int u, int par)
{
	if (ke[u].size() == 1 and u > 1)
		return 0;
	int dist = inf, reach = -inf;
	for (auto [v, w] : ke[u])
	if (v != par)
	{
		int a = dfs(v, u);
		if (a == 0 and covered[v])
		{
			maximize(reach, 0LL);
			minimize(dist, 0LL);
			continue;
		}
		if (a < 0 and a + w <= 0)
			covered[u] = 1;
		if (a < 0 and a + w > 0)
			a = 0;
		else
			a += w;
		if (a > mid)
		{
			a = min(int(-mid + w), int(0LL));
			if (-mid + w <= 0)
				covered[u] = 1;
			covered[v] = 1;
			used[v] = 1;
			++cnt;
		}
		minimize(dist, a);
		maximize(reach, a);
	}
	if (-dist >= reach)
		return dist;
	return reach;
}
int32_t main() {
#define name "TASK"
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> n >> k;
	int LIM = 0;
	for(int i = 1; i < n; i ++)
	{
		int u, v, w;
		cin >> u >> v >> w;
		ke[u].emplace_back(v, w);
		ke[v].emplace_back(u, w);
		LIM += w;
	}
	int l = 0, r = LIM, ans = LIM;
	while (l <= r)
	{
		for(int i = 1; i <= n; i ++) covered[i] = used[i] = 0;
		cnt = 0;
		mid = (l + r) >> 1;
		if (dfs(1, 1) > 0)
			used[1] = 1, ++cnt;
		else if (!covered[1])
			used[1] = 1, ++cnt;
		if (cnt <= k)
			r = mid - 1, ans = mid;
		else
			l = mid + 1;
	}
	cout << ans;
	en;
	mid = ans;
	for(int i = 1; i <= n; i ++) covered[i] = used[i] = 0;
	cnt = 0;
	if (dfs(1, 1) > 0)
		used[1] = 1, ++cnt;
	else if (!covered[1])
		used[1] = 1, ++cnt;
	vi res;
	for(int i = 1; i <= n; i++) if (used[i]) res.emplace_back(i);
	for(int i = 1; i <= n; i++) if ((int)res.size() < k and !used[i]) res.emplace_back(i);
	for (int it : res)
	cout << it << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 23896 KB Output is correct
2 Correct 10 ms 23896 KB Output is correct
3 Correct 10 ms 23900 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 10 ms 23948 KB Output is correct
6 Correct 10 ms 23900 KB Output is correct
7 Correct 10 ms 23856 KB Output is correct
8 Correct 10 ms 23900 KB Output is correct
9 Correct 10 ms 23900 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 11 ms 23900 KB Output is correct
12 Correct 10 ms 23956 KB Output is correct
13 Correct 12 ms 23896 KB Output is correct
14 Correct 12 ms 23900 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 107 ms 50464 KB Output is correct
2 Correct 182 ms 52632 KB Output is correct
3 Correct 121 ms 38020 KB Output is correct
4 Correct 391 ms 38012 KB Output is correct
5 Correct 371 ms 37616 KB Output is correct
6 Correct 361 ms 37460 KB Output is correct
7 Correct 221 ms 36300 KB Output is correct
8 Correct 203 ms 36944 KB Output is correct
9 Correct 332 ms 37716 KB Output is correct
10 Correct 359 ms 37636 KB Output is correct
11 Correct 328 ms 39388 KB Output is correct
12 Correct 318 ms 39276 KB Output is correct
13 Correct 342 ms 40788 KB Output is correct
14 Correct 189 ms 37672 KB Output is correct
15 Correct 170 ms 37456 KB Output is correct
16 Correct 306 ms 38740 KB Output is correct
17 Correct 298 ms 37940 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 170 ms 53072 KB Output is correct
2 Correct 158 ms 52340 KB Output is correct
3 Correct 154 ms 50768 KB Output is correct
4 Correct 149 ms 50832 KB Output is correct
5 Correct 182 ms 54464 KB Output is correct
6 Correct 194 ms 53452 KB Output is correct
7 Correct 212 ms 54848 KB Output is correct
8 Correct 160 ms 52628 KB Output is correct
9 Correct 158 ms 52304 KB Output is correct
10 Correct 166 ms 51712 KB Output is correct
11 Correct 149 ms 51028 KB Output is correct
12 Correct 213 ms 54956 KB Output is correct
13 Correct 207 ms 54732 KB Output is correct
14 Correct 186 ms 53708 KB Output is correct
15 Correct 103 ms 50944 KB Output is correct
16 Correct 102 ms 50004 KB Output is correct
17 Correct 104 ms 49932 KB Output is correct
18 Correct 101 ms 51280 KB Output is correct
19 Correct 119 ms 52384 KB Output is correct
20 Correct 114 ms 52936 KB Output is correct
21 Correct 114 ms 51940 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 23896 KB Output is correct
2 Correct 10 ms 23896 KB Output is correct
3 Correct 10 ms 23900 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 10 ms 23948 KB Output is correct
6 Correct 10 ms 23900 KB Output is correct
7 Correct 10 ms 23856 KB Output is correct
8 Correct 10 ms 23900 KB Output is correct
9 Correct 10 ms 23900 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 11 ms 23900 KB Output is correct
12 Correct 10 ms 23956 KB Output is correct
13 Correct 12 ms 23896 KB Output is correct
14 Correct 12 ms 23900 KB Output is correct
15 Correct 107 ms 50464 KB Output is correct
16 Correct 182 ms 52632 KB Output is correct
17 Correct 121 ms 38020 KB Output is correct
18 Correct 391 ms 38012 KB Output is correct
19 Correct 371 ms 37616 KB Output is correct
20 Correct 361 ms 37460 KB Output is correct
21 Correct 221 ms 36300 KB Output is correct
22 Correct 203 ms 36944 KB Output is correct
23 Correct 332 ms 37716 KB Output is correct
24 Correct 359 ms 37636 KB Output is correct
25 Correct 328 ms 39388 KB Output is correct
26 Correct 318 ms 39276 KB Output is correct
27 Correct 342 ms 40788 KB Output is correct
28 Correct 189 ms 37672 KB Output is correct
29 Correct 170 ms 37456 KB Output is correct
30 Correct 306 ms 38740 KB Output is correct
31 Correct 298 ms 37940 KB Output is correct
32 Correct 170 ms 53072 KB Output is correct
33 Correct 158 ms 52340 KB Output is correct
34 Correct 154 ms 50768 KB Output is correct
35 Correct 149 ms 50832 KB Output is correct
36 Correct 182 ms 54464 KB Output is correct
37 Correct 194 ms 53452 KB Output is correct
38 Correct 212 ms 54848 KB Output is correct
39 Correct 160 ms 52628 KB Output is correct
40 Correct 158 ms 52304 KB Output is correct
41 Correct 166 ms 51712 KB Output is correct
42 Correct 149 ms 51028 KB Output is correct
43 Correct 213 ms 54956 KB Output is correct
44 Correct 207 ms 54732 KB Output is correct
45 Correct 186 ms 53708 KB Output is correct
46 Correct 103 ms 50944 KB Output is correct
47 Correct 102 ms 50004 KB Output is correct
48 Correct 104 ms 49932 KB Output is correct
49 Correct 101 ms 51280 KB Output is correct
50 Correct 119 ms 52384 KB Output is correct
51 Correct 114 ms 52936 KB Output is correct
52 Correct 114 ms 51940 KB Output is correct
53 Correct 332 ms 37968 KB Output is correct
54 Correct 429 ms 38484 KB Output is correct
55 Correct 337 ms 38992 KB Output is correct
56 Correct 347 ms 38884 KB Output is correct
57 Correct 405 ms 39580 KB Output is correct
58 Correct 333 ms 37972 KB Output is correct
59 Correct 393 ms 41320 KB Output is correct
60 Correct 201 ms 37456 KB Output is correct
61 Correct 179 ms 36180 KB Output is correct
62 Correct 191 ms 37580 KB Output is correct
63 Correct 198 ms 37348 KB Output is correct
64 Correct 200 ms 39400 KB Output is correct
65 Correct 342 ms 37716 KB Output is correct
66 Correct 406 ms 38568 KB Output is correct
67 Correct 321 ms 36948 KB Output is correct
68 Correct 389 ms 40920 KB Output is correct
69 Correct 168 ms 52628 KB Output is correct
70 Correct 152 ms 50516 KB Output is correct
71 Correct 203 ms 54212 KB Output is correct
72 Correct 115 ms 37320 KB Output is correct
73 Correct 83 ms 36544 KB Output is correct
74 Correct 101 ms 38896 KB Output is correct
75 Correct 342 ms 39764 KB Output is correct
76 Correct 193 ms 38992 KB Output is correct
77 Correct 311 ms 38996 KB Output is correct
78 Correct 194 ms 38868 KB Output is correct