oj.uz

Submission #1068085

# Submission time Handle Problem Language Result Execution time Memory
1068085 2024-08-21T07:15:00 Z shidou26 Parkovi (COCI22_parkovi) C++14
110 / 110
 573 ms 35280 KB 
#include <bits/stdc++.h>
using namespace std;

#define endl '\n'
#define all(v) v.begin(), v.end()
#define filter(v) v.resize(unique(all(v)) - v.begin())

typedef long long ll;
typedef pair<int, int> ii;

const int MOD = 1e9 + 7;
inline ll add(ll x, ll y, ll mod = MOD) {return ((x % mod) + (y % mod)) % mod;}
inline ll sub(ll x, ll y, ll mod = MOD) {return ((x - y) % mod + mod) % mod;}
inline ll prod(ll x, ll y, ll mod = MOD) {return ((x % mod) * (y % mod)) % mod;}

const int N = 2e5 + 3;
const ll INF = 1e18;

int n, k;
vector<ii> adj[N];

int num_park = 0;
bool is_park[N];
ll near[N], reach[N];

void prepare() {

}

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

	for(int i = 1; i < n; i++) {
		int u, v, w; cin >> u >> v >> w;
		adj[u].push_back(ii(v, w));
		adj[v].push_back(ii(u, w));
	}
}

void dfs(int u, int p, ll limit) {
	near[u] = INF; reach[u] = 0;

	for(int i = 0; i < (int)adj[u].size(); i++) {
		int v, w; tie(v, w) = adj[u][i];

		if(v != p) {
			dfs(v, u, limit);

			if(reach[v] + min(1LL * w, near[v]) <= limit) {
				near[u] = min(near[u], near[v] + w);
				if(reach[v] + near[v] > limit) reach[u] = max(reach[u], reach[v] + w);
			}else {
				num_park++;
				is_park[v] = true;
				near[u] = min(near[u], 1LL * w);
			}
		}	
	}
}

bool check(ll limit) {
	num_park = 0;
	for(int i = 1; i <= n; i++) is_park[i] = false;

	dfs(1, -1, limit);

	if(reach[1] + near[1] > limit) {
		num_park++;
		is_park[1] = true;
	}

	return num_park <= k;
}

void process() {
	ll l = 0, r = 1e15, res = 0;
	while(l <= r) {
		ll m = (l + r) >> 1;
		if(check(m)) {
			res = m;
			r = m - 1;
		}else {
			l = m + 1;
		}
	}

	cout << res << endl;
	check(res);
	vector<int> nodes;
	for(int i = 1; i <= n; i++) if(is_park[i]) nodes.push_back(i);
	for(int i = 1; i <= n; i++) if((int)nodes.size() < k && !is_park[i]) nodes.push_back(i);
	for(int node : nodes) cout << node << " ";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    #define task "Date_A_Live"
    if(fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    
    prepare();
    
    int tc = 1; // cin >> tc;
    
    for(int i = 1; i <= tc; i++) {
        input();
        process();
    }

    cerr << "Saa, watashtachi no deito hajimemashou" << endl;

    return 0;
}

/*
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*/

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:101:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  101 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:102:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  102 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 5060 KB Output is correct
3 Correct 2 ms 4952 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4952 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5160 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 4 ms 4956 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 205 ms 28592 KB Output is correct
2 Correct 215 ms 29264 KB Output is correct
3 Correct 178 ms 16088 KB Output is correct
4 Correct 519 ms 19288 KB Output is correct
5 Correct 545 ms 18972 KB Output is correct
6 Correct 471 ms 18772 KB Output is correct
7 Correct 452 ms 17696 KB Output is correct
8 Correct 490 ms 18296 KB Output is correct
9 Correct 486 ms 18700 KB Output is correct
10 Correct 527 ms 19028 KB Output is correct
11 Correct 422 ms 20564 KB Output is correct
12 Correct 364 ms 20564 KB Output is correct
13 Correct 405 ms 22100 KB Output is correct
14 Correct 356 ms 19024 KB Output is correct
15 Correct 347 ms 18552 KB Output is correct
16 Correct 385 ms 20088 KB Output is correct
17 Correct 353 ms 19284 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 209 ms 29780 KB Output is correct
2 Correct 181 ms 33360 KB Output is correct
3 Correct 166 ms 31908 KB Output is correct
4 Correct 163 ms 31828 KB Output is correct
5 Correct 194 ms 34828 KB Output is correct
6 Correct 223 ms 34252 KB Output is correct
7 Correct 251 ms 35280 KB Output is correct
8 Correct 214 ms 33620 KB Output is correct
9 Correct 193 ms 33364 KB Output is correct
10 Correct 249 ms 32852 KB Output is correct
11 Correct 223 ms 32076 KB Output is correct
12 Correct 236 ms 35176 KB Output is correct
13 Correct 266 ms 35268 KB Output is correct
14 Correct 253 ms 34284 KB Output is correct
15 Correct 188 ms 32336 KB Output is correct
16 Correct 204 ms 31012 KB Output is correct
17 Correct 210 ms 30800 KB Output is correct
18 Correct 196 ms 32336 KB Output is correct
19 Correct 191 ms 32716 KB Output is correct
20 Correct 204 ms 33220 KB Output is correct
21 Correct 219 ms 32464 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 5060 KB Output is correct
3 Correct 2 ms 4952 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4952 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5160 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 4 ms 4956 KB Output is correct
15 Correct 205 ms 28592 KB Output is correct
16 Correct 215 ms 29264 KB Output is correct
17 Correct 178 ms 16088 KB Output is correct
18 Correct 519 ms 19288 KB Output is correct
19 Correct 545 ms 18972 KB Output is correct
20 Correct 471 ms 18772 KB Output is correct
21 Correct 452 ms 17696 KB Output is correct
22 Correct 490 ms 18296 KB Output is correct
23 Correct 486 ms 18700 KB Output is correct
24 Correct 527 ms 19028 KB Output is correct
25 Correct 422 ms 20564 KB Output is correct
26 Correct 364 ms 20564 KB Output is correct
27 Correct 405 ms 22100 KB Output is correct
28 Correct 356 ms 19024 KB Output is correct
29 Correct 347 ms 18552 KB Output is correct
30 Correct 385 ms 20088 KB Output is correct
31 Correct 353 ms 19284 KB Output is correct
32 Correct 209 ms 29780 KB Output is correct
33 Correct 181 ms 33360 KB Output is correct
34 Correct 166 ms 31908 KB Output is correct
35 Correct 163 ms 31828 KB Output is correct
36 Correct 194 ms 34828 KB Output is correct
37 Correct 223 ms 34252 KB Output is correct
38 Correct 251 ms 35280 KB Output is correct
39 Correct 214 ms 33620 KB Output is correct
40 Correct 193 ms 33364 KB Output is correct
41 Correct 249 ms 32852 KB Output is correct
42 Correct 223 ms 32076 KB Output is correct
43 Correct 236 ms 35176 KB Output is correct
44 Correct 266 ms 35268 KB Output is correct
45 Correct 253 ms 34284 KB Output is correct
46 Correct 188 ms 32336 KB Output is correct
47 Correct 204 ms 31012 KB Output is correct
48 Correct 210 ms 30800 KB Output is correct
49 Correct 196 ms 32336 KB Output is correct
50 Correct 191 ms 32716 KB Output is correct
51 Correct 204 ms 33220 KB Output is correct
52 Correct 219 ms 32464 KB Output is correct
53 Correct 477 ms 19300 KB Output is correct
54 Correct 491 ms 19736 KB Output is correct
55 Correct 522 ms 20356 KB Output is correct
56 Correct 564 ms 20072 KB Output is correct
57 Correct 532 ms 20756 KB Output is correct
58 Correct 481 ms 19280 KB Output is correct
59 Correct 521 ms 21964 KB Output is correct
60 Correct 523 ms 18768 KB Output is correct
61 Correct 447 ms 17492 KB Output is correct
62 Correct 475 ms 18488 KB Output is correct
63 Correct 573 ms 18768 KB Output is correct
64 Correct 490 ms 19916 KB Output is correct
65 Correct 494 ms 19024 KB Output is correct
66 Correct 522 ms 19620 KB Output is correct
67 Correct 465 ms 18432 KB Output is correct
68 Correct 550 ms 21444 KB Output is correct
69 Correct 203 ms 33624 KB Output is correct
70 Correct 257 ms 31572 KB Output is correct
71 Correct 243 ms 34764 KB Output is correct
72 Correct 161 ms 19648 KB Output is correct
73 Correct 199 ms 18980 KB Output is correct
74 Correct 183 ms 20664 KB Output is correct
75 Correct 371 ms 20752 KB Output is correct
76 Correct 398 ms 20308 KB Output is correct
77 Correct 417 ms 20048 KB Output is correct
78 Correct 404 ms 20028 KB Output is correct