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Submission #534875

# Submission time Handle Problem Language Result Execution time Memory
534875 2022-03-09T05:28:50 Z kartel Parkovi (COCI22_parkovi) C++14
110 / 110
 1876 ms 44192 KB 
#include <bits/stdc++.h>
//#include<ext/rope>
#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC target("avx2")
//#pragma comment(linker, "/STACK:268435456")


#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
#define F first
#define S second
#define pb push_back
#define sz(x) int(x.size())
#define el '\n'
#define all(x) x.begin(), x.end()

using namespace std;
using namespace __gnu_pbds;
//using  namespace __gnu_cxx;

typedef long long ll;
typedef long double ld;
typedef short int si;
typedef unsigned long long ull;
typedef tree <ll, null_type, less_equal <ll> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;

const int N = 2e5 + 500;

vector <int> ans;
ll dp_down[N], dp_up[N], D;
int n, k;
int u, v, w;
vector <pair <int, int> > g[N];

void dfs(int v, int pr, ll d) {
    dp_down[v] = 1e18;
    dp_up[v] = 0;
    for (auto [u, w] : g[v]) {
        if (u == pr) {
            continue;
        }
        dfs(u, v, w);
        dp_down[v] = min(dp_down[v], dp_down[u]);
        dp_up[v] = max(dp_up[v], dp_up[u]);
    }
    if (dp_down[v] + dp_up[v] <= D) {
        dp_up[v] = -1e18;
    }
    if (dp_up[v] != -1e18 && (pr == -1 || d + dp_up[v] > D)) {
        ans.pb(v);
        dp_down[v] = 0;
        dp_up[v] = -1e18;
    }
    dp_down[v] += d; dp_up[v] += d;
}

int main() {
//    freopen("input.txt", "r", stdin);
//    freopen("anti.out", "w", stdout);
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> k;
    for (int i = 0; i < n - 1; i++) {
        cin >> u >> v >> w;
        g[v].pb({u, w});
        g[u].pb({v, w});
    }
    ll l = 0;
    ll r = (ll)1e18;
    while (l < r) {
        ll md = (l + r) >> 1;
        ans.clear(); D = md;
        dfs(1, -1, 0);
        if (sz(ans) > k) {
            l = md + 1;
        } else {
            r = md;
        }
    }
    D = l;
    ans.clear();
    dfs(1, -1, 0);
    map <int, int> used;
    for (auto x : ans) {
        used[x] = 1;
    }
    for (int i = 1; i <= n; i++) {
        if (!used[i] && sz(ans) < k) {
            ans.pb(i);
        }
    }
    cout << l << el;
    for (auto x : ans) {
        cout << x << " ";
    }
}

Compilation message

Main.cpp: In function 'void dfs(int, int, ll)':
Main.cpp:43:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   43 |     for (auto [u, w] : g[v]) {
      |               ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 437 ms 40004 KB Output is correct
2 Correct 500 ms 42332 KB Output is correct
3 Correct 462 ms 29760 KB Output is correct
4 Correct 1636 ms 27804 KB Output is correct
5 Correct 1512 ms 27088 KB Output is correct
6 Correct 1491 ms 27112 KB Output is correct
7 Correct 1526 ms 26032 KB Output is correct
8 Correct 1650 ms 27100 KB Output is correct
9 Correct 1503 ms 27308 KB Output is correct
10 Correct 1606 ms 27900 KB Output is correct
11 Correct 1043 ms 29068 KB Output is correct
12 Correct 1028 ms 28648 KB Output is correct
13 Correct 1102 ms 30876 KB Output is correct
14 Correct 1028 ms 27260 KB Output is correct
15 Correct 954 ms 26836 KB Output is correct
16 Correct 1006 ms 28464 KB Output is correct
17 Correct 986 ms 27476 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 445 ms 43140 KB Output is correct
2 Correct 466 ms 42072 KB Output is correct
3 Correct 438 ms 40112 KB Output is correct
4 Correct 438 ms 40108 KB Output is correct
5 Correct 515 ms 43272 KB Output is correct
6 Correct 532 ms 42832 KB Output is correct
7 Correct 517 ms 44192 KB Output is correct
8 Correct 441 ms 42764 KB Output is correct
9 Correct 485 ms 42280 KB Output is correct
10 Correct 472 ms 41540 KB Output is correct
11 Correct 448 ms 40212 KB Output is correct
12 Correct 619 ms 43968 KB Output is correct
13 Correct 541 ms 44180 KB Output is correct
14 Correct 506 ms 43096 KB Output is correct
15 Correct 520 ms 40848 KB Output is correct
16 Correct 474 ms 39364 KB Output is correct
17 Correct 466 ms 38408 KB Output is correct
18 Correct 437 ms 38328 KB Output is correct
19 Correct 468 ms 38264 KB Output is correct
20 Correct 458 ms 39188 KB Output is correct
21 Correct 438 ms 38304 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 437 ms 40004 KB Output is correct
16 Correct 500 ms 42332 KB Output is correct
17 Correct 462 ms 29760 KB Output is correct
18 Correct 1636 ms 27804 KB Output is correct
19 Correct 1512 ms 27088 KB Output is correct
20 Correct 1491 ms 27112 KB Output is correct
21 Correct 1526 ms 26032 KB Output is correct
22 Correct 1650 ms 27100 KB Output is correct
23 Correct 1503 ms 27308 KB Output is correct
24 Correct 1606 ms 27900 KB Output is correct
25 Correct 1043 ms 29068 KB Output is correct
26 Correct 1028 ms 28648 KB Output is correct
27 Correct 1102 ms 30876 KB Output is correct
28 Correct 1028 ms 27260 KB Output is correct
29 Correct 954 ms 26836 KB Output is correct
30 Correct 1006 ms 28464 KB Output is correct
31 Correct 986 ms 27476 KB Output is correct
32 Correct 445 ms 43140 KB Output is correct
33 Correct 466 ms 42072 KB Output is correct
34 Correct 438 ms 40112 KB Output is correct
35 Correct 438 ms 40108 KB Output is correct
36 Correct 515 ms 43272 KB Output is correct
37 Correct 532 ms 42832 KB Output is correct
38 Correct 517 ms 44192 KB Output is correct
39 Correct 441 ms 42764 KB Output is correct
40 Correct 485 ms 42280 KB Output is correct
41 Correct 472 ms 41540 KB Output is correct
42 Correct 448 ms 40212 KB Output is correct
43 Correct 619 ms 43968 KB Output is correct
44 Correct 541 ms 44180 KB Output is correct
45 Correct 506 ms 43096 KB Output is correct
46 Correct 520 ms 40848 KB Output is correct
47 Correct 474 ms 39364 KB Output is correct
48 Correct 466 ms 38408 KB Output is correct
49 Correct 437 ms 38328 KB Output is correct
50 Correct 468 ms 38264 KB Output is correct
51 Correct 458 ms 39188 KB Output is correct
52 Correct 438 ms 38304 KB Output is correct
53 Correct 1555 ms 23840 KB Output is correct
54 Correct 1663 ms 24424 KB Output is correct
55 Correct 1763 ms 25364 KB Output is correct
56 Correct 1650 ms 24792 KB Output is correct
57 Correct 1581 ms 25468 KB Output is correct
58 Correct 1593 ms 23972 KB Output is correct
59 Correct 1876 ms 26780 KB Output is correct
60 Correct 1660 ms 24988 KB Output is correct
61 Correct 1403 ms 23240 KB Output is correct
62 Correct 1478 ms 24352 KB Output is correct
63 Correct 1665 ms 25148 KB Output is correct
64 Correct 1606 ms 25792 KB Output is correct
65 Correct 1657 ms 24784 KB Output is correct
66 Correct 1609 ms 24908 KB Output is correct
67 Correct 1473 ms 26560 KB Output is correct
68 Correct 1666 ms 30232 KB Output is correct
69 Correct 430 ms 42448 KB Output is correct
70 Correct 425 ms 39436 KB Output is correct
71 Correct 518 ms 43732 KB Output is correct
72 Correct 458 ms 28336 KB Output is correct
73 Correct 481 ms 28256 KB Output is correct
74 Correct 471 ms 29300 KB Output is correct
75 Correct 1006 ms 29432 KB Output is correct
76 Correct 1052 ms 29212 KB Output is correct
77 Correct 1014 ms 28732 KB Output is correct
78 Correct 992 ms 28612 KB Output is correct