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답안 #765029

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
765029 2023-06-24T07:45:12 Z dxz05 Parkovi (COCI22_parkovi) C++17
110 / 110
 2791 ms 74812 KB 
#pragma GCC optimize("Ofast,O3,unroll-loops")
#pragma GCC target("avx,avx2")

#include <bits/stdc++.h>

using namespace std;

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define bpc(x) __builtin_popcount(x)
#define bpcll(x) __builtin_popcountll(x)
#define MP make_pair
#define BIT(x, i) (((x) >> (i)) & 1)
//#define endl '\n'

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

typedef long long ll;
const int MOD = 1e9 + 7;
const int N = 2e5 + 30;

int n;
vector<pair<int, int>> g[N];

ll dep[N];
int up[N][18];
ll sum[N][18];

void dfs0(int v, int p){
    up[v][0] = p;
    sum[v][0] = dep[v] - dep[p];
    for (int i = 1; i < 18; i++){
        int pp = up[v][i - 1];
        up[v][i] = up[pp][i - 1];
        sum[v][i] = sum[v][i - 1] + sum[pp][i - 1];
    }

    for (auto [u, w] : g[v]){
        if (u != p){
            dep[u] = dep[v] + w;
            dfs0(u, v);
        }
    }
}

ll was[N];
bool deleted[N];

void dfs(int v, int p, ll dist){
    if (was[v] >= dist) return;
    was[v] = dist;
    deleted[v] = true;

    for (auto [u, w] : g[v]){
        if (u == p) continue;
        if (w <= dist){
            dfs(u, v, dist - w);
        } else {
            break;
        }
    }
}

int parks[N];
vector<int> order;

int parks_cnt(ll d){
    for (int i = 1; i <= n; i++){
        was[i] = -1;
        deleted[i] = false;
    }

    int sz = 0;
    for (int i = 0; i < n; i++){
        int v = order[i];
        if (deleted[v]) continue;

        ll x = d;
        for (int j = 17; j >= 0; j--){
            if (sum[v][j] <= x){
                x -= sum[v][j];
                v = up[v][j];
            }
        }

        parks[sz++] = v;

        dfs(v, -1, d);
    }

    return sz;
}

int ans[N];

void solve(){
    int k;
    cin >> n >> k;

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

    int root = 1;
    for (int i = 1; i <= n; i++){
        if (g[i].size() > 1) root = i;

        sort(all(g[i]), [&](auto x, auto y){
            return x.second < y.second;
        });

    }

    dfs0(root, root);

    order.resize(n);
    iota(all(order), 1);

    sort(all(order), [&](int i, int j){
        return dep[i] > dep[j];
    });

    int sz = 0;

    ll l = 0, r = 2e14;
    while (l <= r){
        ll m = (l + r) >> 1;

        int res = parks_cnt(m);

        if (res <= k){
            sz = res;
            for (int i = 0; i < res; i++) ans[i] = parks[i];
            r = m - 1;
        } else {
            l = m + 1;
        }
    }

    sort(ans, ans + sz);

    cout << ++r << endl;
    for (int i = 0; i < sz; i++) cout << ans[i] << ' ';

    int x = k - sz;
    for (int i = 1; i <= n; i++){
        if (x == 0) break;
        int j = lower_bound(ans, ans + sz, i) - ans;
        if (j == sz || ans[j] != i){
            cout << i << ' ';
            x--;
        }
    }

    cout << endl;
}

int main(){
    clock_t startTime = clock();
    ios_base::sync_with_stdio(false);

#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int test_cases = 1;
//    cin >> test_cases;

    for (int test = 1; test <= test_cases; test++){
        // cout << (solve() ? "YES" : "NO") << endl;
        solve();
    }

#ifdef LOCAL
    cerr << "Time: " << int((double) (clock() - startTime) / CLOCKS_PER_SEC * 1000) << " ms" << endl;
#endif

    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:162:13: warning: unused variable 'startTime' [-Wunused-variable]
  162 |     clock_t startTime = clock();
      |             ^~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 5076 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 246 ms 69088 KB Output is correct
2 Correct 249 ms 70824 KB Output is correct
3 Correct 478 ms 59080 KB Output is correct
4 Correct 687 ms 55512 KB Output is correct
5 Correct 629 ms 53824 KB Output is correct
6 Correct 620 ms 53860 KB Output is correct
7 Correct 600 ms 54316 KB Output is correct
8 Correct 641 ms 56916 KB Output is correct
9 Correct 675 ms 55536 KB Output is correct
10 Correct 716 ms 56760 KB Output is correct
11 Correct 474 ms 58028 KB Output is correct
12 Correct 467 ms 56168 KB Output is correct
13 Correct 581 ms 60716 KB Output is correct
14 Correct 430 ms 55604 KB Output is correct
15 Correct 441 ms 55780 KB Output is correct
16 Correct 473 ms 56696 KB Output is correct
17 Correct 476 ms 55792 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 228 ms 71980 KB Output is correct
2 Correct 222 ms 70048 KB Output is correct
3 Correct 227 ms 66868 KB Output is correct
4 Correct 230 ms 66680 KB Output is correct
5 Correct 296 ms 71640 KB Output is correct
6 Correct 401 ms 71088 KB Output is correct
7 Correct 397 ms 73312 KB Output is correct
8 Correct 228 ms 72408 KB Output is correct
9 Correct 222 ms 71740 KB Output is correct
10 Correct 229 ms 70476 KB Output is correct
11 Correct 246 ms 68212 KB Output is correct
12 Correct 387 ms 73936 KB Output is correct
13 Correct 401 ms 74372 KB Output is correct
14 Correct 405 ms 72688 KB Output is correct
15 Correct 229 ms 70368 KB Output is correct
16 Correct 221 ms 67756 KB Output is correct
17 Correct 230 ms 67404 KB Output is correct
18 Correct 253 ms 70944 KB Output is correct
19 Correct 272 ms 69568 KB Output is correct
20 Correct 287 ms 71428 KB Output is correct
21 Correct 276 ms 70036 KB Output is correct

Subtask #4
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 5076 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 246 ms 69088 KB Output is correct
16 Correct 249 ms 70824 KB Output is correct
17 Correct 478 ms 59080 KB Output is correct
18 Correct 687 ms 55512 KB Output is correct
19 Correct 629 ms 53824 KB Output is correct
20 Correct 620 ms 53860 KB Output is correct
21 Correct 600 ms 54316 KB Output is correct
22 Correct 641 ms 56916 KB Output is correct
23 Correct 675 ms 55536 KB Output is correct
24 Correct 716 ms 56760 KB Output is correct
25 Correct 474 ms 58028 KB Output is correct
26 Correct 467 ms 56168 KB Output is correct
27 Correct 581 ms 60716 KB Output is correct
28 Correct 430 ms 55604 KB Output is correct
29 Correct 441 ms 55780 KB Output is correct
30 Correct 473 ms 56696 KB Output is correct
31 Correct 476 ms 55792 KB Output is correct
32 Correct 228 ms 71980 KB Output is correct
33 Correct 222 ms 70048 KB Output is correct
34 Correct 227 ms 66868 KB Output is correct
35 Correct 230 ms 66680 KB Output is correct
36 Correct 296 ms 71640 KB Output is correct
37 Correct 401 ms 71088 KB Output is correct
38 Correct 397 ms 73312 KB Output is correct
39 Correct 228 ms 72408 KB Output is correct
40 Correct 222 ms 71740 KB Output is correct
41 Correct 229 ms 70476 KB Output is correct
42 Correct 246 ms 68212 KB Output is correct
43 Correct 387 ms 73936 KB Output is correct
44 Correct 401 ms 74372 KB Output is correct
45 Correct 405 ms 72688 KB Output is correct
46 Correct 229 ms 70368 KB Output is correct
47 Correct 221 ms 67756 KB Output is correct
48 Correct 230 ms 67404 KB Output is correct
49 Correct 253 ms 70944 KB Output is correct
50 Correct 272 ms 69568 KB Output is correct
51 Correct 287 ms 71428 KB Output is correct
52 Correct 276 ms 70036 KB Output is correct
53 Correct 2421 ms 55020 KB Output is correct
54 Correct 2021 ms 57416 KB Output is correct
55 Correct 2707 ms 59652 KB Output is correct
56 Correct 1346 ms 58340 KB Output is correct
57 Correct 1608 ms 59216 KB Output is correct
58 Correct 841 ms 56372 KB Output is correct
59 Correct 1499 ms 61020 KB Output is correct
60 Correct 970 ms 59468 KB Output is correct
61 Correct 785 ms 54600 KB Output is correct
62 Correct 770 ms 55684 KB Output is correct
63 Correct 657 ms 59596 KB Output is correct
64 Correct 805 ms 58848 KB Output is correct
65 Correct 2791 ms 58068 KB Output is correct
66 Correct 1928 ms 57440 KB Output is correct
67 Correct 872 ms 55120 KB Output is correct
68 Correct 1899 ms 61704 KB Output is correct
69 Correct 233 ms 71652 KB Output is correct
70 Correct 224 ms 68500 KB Output is correct
71 Correct 440 ms 74812 KB Output is correct
72 Correct 466 ms 56928 KB Output is correct
73 Correct 608 ms 59328 KB Output is correct
74 Correct 629 ms 60872 KB Output is correct
75 Correct 511 ms 58228 KB Output is correct
76 Correct 657 ms 61540 KB Output is correct
77 Correct 528 ms 58572 KB Output is correct
78 Correct 641 ms 59156 KB Output is correct