oj.uz

Submission #865292

# Submission time Handle Problem Language Result Execution time Memory
865292 2023-10-24T07:10:40 Z TAhmed33 Parkovi (COCI22_parkovi) C++
110 / 110
 1803 ms 80656 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN = 2e5 + 25;
vector <pair <int, ll>> adj2[MAXN];
vector <pair <int, ll>> adj[MAXN];
ll mid;
int n, k;
bool vis[MAXN];
int cnt = 0;
vector <int> u, ans_vec;
void add (int pos) {
	//cout << "LOL: " << pos << '\n';
	u.push_back(pos);
}
pair <ll, ll> dfs (int pos, int par = -1) {
	vis[pos] = 1;
	if (par != -1 && adj[pos].size() == 1) return {0, 0};
	if (par == -1 && adj[pos].empty()) {
		cnt++; add(pos); return {0, 0};
	}
	vector <pair <ll, ll>> good, bad;
	int flag = 0;
	for (auto j : adj[pos]) {
		if (j.first == par) continue;
		auto k = dfs(j.first, pos);
		if (k.second == 0) {
			if (k.first + j.second > mid) {
				flag++; add(j.first); good.push_back({j.second, 1});
			} else bad.push_back({k.first + j.second, 0});
		} else {
			if (k.first + j.second > mid) continue;
			good.push_back({k.first + j.second, 1});		
		}
	}
	cnt += flag;
	sort(good.begin(), good.end());
	sort(bad.begin(), bad.end());
	/*
	cout << pos << " : \n";
	for (auto j : good) cout << j.first << " " << j.second << " | ";
	cout << '\n';
	for (auto j : bad) cout << j.first << " " << j.second << " | ";
	cout << '\n' << '\n';
	*/
	if (par == -1 && good.empty() && bad.empty()) {
		cnt++; add(pos); return {0, 1};
	}
	if (good.empty() && bad.empty()) {
		return {0, 0};
	}
	if (par == -1) {
		if (bad.empty()) return {0, 0};
		if (good.empty()) {
			cnt++; add(pos); return {0, 0};
		}
		if (bad.back().first + good.front().first > mid) {
			cnt++; add(pos); return bad.back();
		}
		return good.front();	
	}
	if (bad.empty()) {
		return good.front();
	}
	if (good.empty()) return bad.back();
	if (bad.back().first + good.front().first > mid) return bad.back();
	return good.front();
}
bool check () { 
	cnt = 0; u.clear();
	for (int i = 1; i <= n; i++) {
		vis[i] = 0; adj[i].clear();
		for (auto j : adj2[i]) {
			if (j.second <= mid) {
				adj[i].push_back(j);
			}
		}
	}
	for (int i = 1; i <= n; i++) {
		if (!vis[i]) {
			dfs(i);
			//cout << i << " L L L L " << cnt << '\n';
		}
	}
	//cout << mid << " " << cnt << '\n';
	return cnt <= k;
}
set <int> pp; 
int main () {
	cin >> n >> k;
	for (int i = 1; i < n; i++) {
		int a, b, c;
		cin >> a >> b >> c;
		adj2[a].push_back({b, c});
		adj2[b].push_back({a, c});
	}
	//mid = 47; cout << check() << '\n'; return 0;
	ll l = 0, r = 1e16; ll ans = 1;
	while (l <= r) {
		mid = (l + r) >> 1;
		if (check()) {
			ans_vec = u;
			r = mid - 1; ans = mid;
		} else {
			l = mid + 1;
		}
	}
	cout << ans << '\n'; //return 0;
	for (int i = 1; i <= n; i++) pp.insert(i);
	for (auto i : ans_vec) {
		cout << i << " "; pp.erase(i); k--;
	}
	for (int i = 1; i <= n && k; i++) {
		if (pp.count(i)) {
			k--; cout << i << " ";
		}
	}
	cout << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9816 KB Output is correct
6 Correct 2 ms 9820 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 2 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9820 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 KB Output is correct
14 Correct 3 ms 9816 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1024 ms 71544 KB Output is correct
2 Correct 1120 ms 73300 KB Output is correct
3 Correct 1485 ms 40244 KB Output is correct
4 Correct 1700 ms 37928 KB Output is correct
5 Correct 1803 ms 37064 KB Output is correct
6 Correct 1771 ms 37080 KB Output is correct
7 Correct 1708 ms 37376 KB Output is correct
8 Correct 1781 ms 38748 KB Output is correct
9 Correct 1450 ms 37968 KB Output is correct
10 Correct 1431 ms 38740 KB Output is correct
11 Correct 1586 ms 41056 KB Output is correct
12 Correct 1592 ms 41556 KB Output is correct
13 Correct 1741 ms 44232 KB Output is correct
14 Correct 1481 ms 40960 KB Output is correct
15 Correct 1491 ms 40016 KB Output is correct
16 Correct 1587 ms 41424 KB Output is correct
17 Correct 1476 ms 40020 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1102 ms 74304 KB Output is correct
2 Correct 1054 ms 72496 KB Output is correct
3 Correct 1008 ms 69460 KB Output is correct
4 Correct 995 ms 69248 KB Output is correct
5 Correct 635 ms 74028 KB Output is correct
6 Correct 772 ms 73744 KB Output is correct
7 Correct 796 ms 75832 KB Output is correct
8 Correct 1083 ms 74832 KB Output is correct
9 Correct 1049 ms 74064 KB Output is correct
10 Correct 1006 ms 73188 KB Output is correct
11 Correct 1020 ms 70416 KB Output is correct
12 Correct 760 ms 76372 KB Output is correct
13 Correct 793 ms 80656 KB Output is correct
14 Correct 793 ms 78968 KB Output is correct
15 Correct 1002 ms 75856 KB Output is correct
16 Correct 1020 ms 72912 KB Output is correct
17 Correct 948 ms 72804 KB Output is correct
18 Correct 1053 ms 76436 KB Output is correct
19 Correct 930 ms 74980 KB Output is correct
20 Correct 1034 ms 76852 KB Output is correct
21 Correct 985 ms 75380 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9816 KB Output is correct
6 Correct 2 ms 9820 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 2 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9820 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 KB Output is correct
14 Correct 3 ms 9816 KB Output is correct
15 Correct 1024 ms 71544 KB Output is correct
16 Correct 1120 ms 73300 KB Output is correct
17 Correct 1485 ms 40244 KB Output is correct
18 Correct 1700 ms 37928 KB Output is correct
19 Correct 1803 ms 37064 KB Output is correct
20 Correct 1771 ms 37080 KB Output is correct
21 Correct 1708 ms 37376 KB Output is correct
22 Correct 1781 ms 38748 KB Output is correct
23 Correct 1450 ms 37968 KB Output is correct
24 Correct 1431 ms 38740 KB Output is correct
25 Correct 1586 ms 41056 KB Output is correct
26 Correct 1592 ms 41556 KB Output is correct
27 Correct 1741 ms 44232 KB Output is correct
28 Correct 1481 ms 40960 KB Output is correct
29 Correct 1491 ms 40016 KB Output is correct
30 Correct 1587 ms 41424 KB Output is correct
31 Correct 1476 ms 40020 KB Output is correct
32 Correct 1102 ms 74304 KB Output is correct
33 Correct 1054 ms 72496 KB Output is correct
34 Correct 1008 ms 69460 KB Output is correct
35 Correct 995 ms 69248 KB Output is correct
36 Correct 635 ms 74028 KB Output is correct
37 Correct 772 ms 73744 KB Output is correct
38 Correct 796 ms 75832 KB Output is correct
39 Correct 1083 ms 74832 KB Output is correct
40 Correct 1049 ms 74064 KB Output is correct
41 Correct 1006 ms 73188 KB Output is correct
42 Correct 1020 ms 70416 KB Output is correct
43 Correct 760 ms 76372 KB Output is correct
44 Correct 793 ms 80656 KB Output is correct
45 Correct 793 ms 78968 KB Output is correct
46 Correct 1002 ms 75856 KB Output is correct
47 Correct 1020 ms 72912 KB Output is correct
48 Correct 948 ms 72804 KB Output is correct
49 Correct 1053 ms 76436 KB Output is correct
50 Correct 930 ms 74980 KB Output is correct
51 Correct 1034 ms 76852 KB Output is correct
52 Correct 985 ms 75380 KB Output is correct
53 Correct 1620 ms 41900 KB Output is correct
54 Correct 1447 ms 42860 KB Output is correct
55 Correct 1491 ms 44544 KB Output is correct
56 Correct 1524 ms 43580 KB Output is correct
57 Correct 1708 ms 44324 KB Output is correct
58 Correct 1691 ms 42112 KB Output is correct
59 Correct 1018 ms 46100 KB Output is correct
60 Correct 1625 ms 42648 KB Output is correct
61 Correct 1296 ms 39764 KB Output is correct
62 Correct 1303 ms 40924 KB Output is correct
63 Correct 1476 ms 42832 KB Output is correct
64 Correct 1317 ms 43352 KB Output is correct
65 Correct 1420 ms 42760 KB Output is correct
66 Correct 1235 ms 42844 KB Output is correct
67 Correct 1351 ms 40788 KB Output is correct
68 Correct 1254 ms 45884 KB Output is correct
69 Correct 1081 ms 77416 KB Output is correct
70 Correct 974 ms 73224 KB Output is correct
71 Correct 818 ms 80184 KB Output is correct
72 Correct 1367 ms 41388 KB Output is correct
73 Correct 1086 ms 40576 KB Output is correct
74 Correct 1132 ms 42360 KB Output is correct
75 Correct 1602 ms 46100 KB Output is correct
76 Correct 1742 ms 46564 KB Output is correct
77 Correct 1611 ms 45648 KB Output is correct
78 Correct 1573 ms 45856 KB Output is correct