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답안 #391749

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
391749 2021-04-19T16:29:32 Z ntabc05101 경주 (Race) (IOI11_race) C++14
100 / 100
 614 ms 35352 KB 
#include "race.h"
#include<bits/stdc++.h>
using namespace std;

#define LL long long
#define f first
#define s second

const int mxN = 200000;
const int mxK = 1000000;

int n, k;
vector< pair<int, int> > adj[mxN + 5];
int n_child[mxN + 5];
int cnt[mxK + 5];
bool used[mxN + 5];
vector<int> order;
int mx_depth;
int result;

int get_subtree_size(int u, int p = -1) {
        n_child[u] = 1;
        for (auto& to: adj[u]) {
                if (!used[to.f] && to.f != p) {
                        n_child[u] += get_subtree_size(to.f, u);
                }
        }

        return n_child[u];
}

int get_centroid(int desired, int u, int p = -1) {
        for (auto& to: adj[u]) {
                if (!used[to.f] && to.f != p && n_child[to.f] >= desired) {
                        return get_centroid(desired, to.f, u);
                }
        }

        return u;
}

void get_cnt(int u, int p, bool e, int w, int depth) {
        if (w > k) {
                return ;
        }

        order.push_back(w);
        if (e) {
                cnt[w] = min(cnt[w], depth);
        }
        else {
                result = min(result, cnt[k - w] + depth);
        }

        for (auto& to: adj[u]) {
                if (!used[to.f] && to.f != p) {
                        get_cnt(to.f, u, e, w + to.s, depth + 1);
                }
        }
}

void centroid_decomp(int u) {
        int centroid = get_centroid(get_subtree_size(u) >> 1, u);
        used[centroid] = true;
        mx_depth = 0;

        for (auto& to: adj[centroid]) {
                if (!used[to.f]) {
                        get_cnt(to.f, centroid, false, to.s, 1);
                        get_cnt(to.f, centroid, true, to.s, 1);
                }
        }

        for (auto& v: order) {
                cnt[v] = n + 5;
        }
        order.clear();

        for (auto& to: adj[centroid]) {
                if (!used[to.f]) {
                        centroid_decomp(to.f);
                }
        }
}

int best_path(int N, int K, int H[][2], int L[]) {
        n = N, k = K;
        for (int i = 0; i < n - 1; i++) {
                //H[i][0]--, H[i][1]--;

                adj[H[i][0]].emplace_back(H[i][1], L[i]);
                adj[H[i][1]].emplace_back(H[i][0], L[i]);
        }

        cnt[0] = 0;
        for (int i = 1; i <= mxK; i++) {
                cnt[i] = n + 5;
        }
        result = n + 5;

        centroid_decomp(0);

        return (result >= n ? -1: result);
}

/*int main() {
        cin.tie(0)->sync_with_stdio(0);
        
        int N, K; cin >> N >> K;
        int H[N][2], L[N];
        for (int i = 0, x, y; i < N - 1; i++) {
                cin >> H[i][0] >> H[i][1] >> L[i];
        }
        
        cout << best_path(N, K, H, L) << endl;

        return 0;
}*/

/*
4 3
0 1 1
1 2 2
1 3 4

11 12
0 1 3
0 2 4
2 3 5
3 4 4
4 5 6
0 6 3
6 7 2
6 8 5
8 9 6
8 10 7
*/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8908 KB Output is correct
2 Correct 5 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8848 KB Output is correct
5 Correct 5 ms 8908 KB Output is correct
6 Correct 5 ms 8908 KB Output is correct
7 Correct 5 ms 8908 KB Output is correct
8 Correct 5 ms 8908 KB Output is correct
9 Correct 5 ms 8844 KB Output is correct
10 Correct 5 ms 8848 KB Output is correct
11 Correct 5 ms 8908 KB Output is correct
12 Correct 6 ms 8844 KB Output is correct
13 Correct 5 ms 8908 KB Output is correct
14 Correct 5 ms 8860 KB Output is correct
15 Correct 5 ms 8908 KB Output is correct
16 Correct 6 ms 8844 KB Output is correct
17 Correct 6 ms 8840 KB Output is correct
18 Correct 5 ms 8908 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8908 KB Output is correct
2 Correct 5 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8848 KB Output is correct
5 Correct 5 ms 8908 KB Output is correct
6 Correct 5 ms 8908 KB Output is correct
7 Correct 5 ms 8908 KB Output is correct
8 Correct 5 ms 8908 KB Output is correct
9 Correct 5 ms 8844 KB Output is correct
10 Correct 5 ms 8848 KB Output is correct
11 Correct 5 ms 8908 KB Output is correct
12 Correct 6 ms 8844 KB Output is correct
13 Correct 5 ms 8908 KB Output is correct
14 Correct 5 ms 8860 KB Output is correct
15 Correct 5 ms 8908 KB Output is correct
16 Correct 6 ms 8844 KB Output is correct
17 Correct 6 ms 8840 KB Output is correct
18 Correct 5 ms 8908 KB Output is correct
19 Correct 5 ms 8908 KB Output is correct
20 Correct 6 ms 8908 KB Output is correct
21 Correct 6 ms 8908 KB Output is correct
22 Correct 7 ms 8928 KB Output is correct
23 Correct 6 ms 8908 KB Output is correct
24 Correct 6 ms 8908 KB Output is correct
25 Correct 6 ms 8908 KB Output is correct
26 Correct 6 ms 8908 KB Output is correct
27 Correct 6 ms 8996 KB Output is correct
28 Correct 7 ms 8908 KB Output is correct
29 Correct 6 ms 8972 KB Output is correct
30 Correct 8 ms 8908 KB Output is correct
31 Correct 6 ms 8908 KB Output is correct
32 Correct 7 ms 9020 KB Output is correct
33 Correct 7 ms 8908 KB Output is correct
34 Correct 7 ms 8912 KB Output is correct
35 Correct 7 ms 8908 KB Output is correct
36 Correct 7 ms 8908 KB Output is correct
37 Correct 6 ms 8908 KB Output is correct
38 Correct 6 ms 8980 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8908 KB Output is correct
2 Correct 5 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8848 KB Output is correct
5 Correct 5 ms 8908 KB Output is correct
6 Correct 5 ms 8908 KB Output is correct
7 Correct 5 ms 8908 KB Output is correct
8 Correct 5 ms 8908 KB Output is correct
9 Correct 5 ms 8844 KB Output is correct
10 Correct 5 ms 8848 KB Output is correct
11 Correct 5 ms 8908 KB Output is correct
12 Correct 6 ms 8844 KB Output is correct
13 Correct 5 ms 8908 KB Output is correct
14 Correct 5 ms 8860 KB Output is correct
15 Correct 5 ms 8908 KB Output is correct
16 Correct 6 ms 8844 KB Output is correct
17 Correct 6 ms 8840 KB Output is correct
18 Correct 5 ms 8908 KB Output is correct
19 Correct 152 ms 15772 KB Output is correct
20 Correct 166 ms 15752 KB Output is correct
21 Correct 189 ms 16120 KB Output is correct
22 Correct 145 ms 16700 KB Output is correct
23 Correct 84 ms 15860 KB Output is correct
24 Correct 73 ms 15892 KB Output is correct
25 Correct 142 ms 18464 KB Output is correct
26 Correct 115 ms 22308 KB Output is correct
27 Correct 195 ms 22808 KB Output is correct
28 Correct 311 ms 34076 KB Output is correct
29 Correct 284 ms 33036 KB Output is correct
30 Correct 221 ms 22812 KB Output is correct
31 Correct 200 ms 22808 KB Output is correct
32 Correct 236 ms 22820 KB Output is correct
33 Correct 260 ms 21576 KB Output is correct
34 Correct 228 ms 22444 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8908 KB Output is correct
2 Correct 5 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8848 KB Output is correct
5 Correct 5 ms 8908 KB Output is correct
6 Correct 5 ms 8908 KB Output is correct
7 Correct 5 ms 8908 KB Output is correct
8 Correct 5 ms 8908 KB Output is correct
9 Correct 5 ms 8844 KB Output is correct
10 Correct 5 ms 8848 KB Output is correct
11 Correct 5 ms 8908 KB Output is correct
12 Correct 6 ms 8844 KB Output is correct
13 Correct 5 ms 8908 KB Output is correct
14 Correct 5 ms 8860 KB Output is correct
15 Correct 5 ms 8908 KB Output is correct
16 Correct 6 ms 8844 KB Output is correct
17 Correct 6 ms 8840 KB Output is correct
18 Correct 5 ms 8908 KB Output is correct
19 Correct 5 ms 8908 KB Output is correct
20 Correct 6 ms 8908 KB Output is correct
21 Correct 6 ms 8908 KB Output is correct
22 Correct 7 ms 8928 KB Output is correct
23 Correct 6 ms 8908 KB Output is correct
24 Correct 6 ms 8908 KB Output is correct
25 Correct 6 ms 8908 KB Output is correct
26 Correct 6 ms 8908 KB Output is correct
27 Correct 6 ms 8996 KB Output is correct
28 Correct 7 ms 8908 KB Output is correct
29 Correct 6 ms 8972 KB Output is correct
30 Correct 8 ms 8908 KB Output is correct
31 Correct 6 ms 8908 KB Output is correct
32 Correct 7 ms 9020 KB Output is correct
33 Correct 7 ms 8908 KB Output is correct
34 Correct 7 ms 8912 KB Output is correct
35 Correct 7 ms 8908 KB Output is correct
36 Correct 7 ms 8908 KB Output is correct
37 Correct 6 ms 8908 KB Output is correct
38 Correct 6 ms 8980 KB Output is correct
39 Correct 152 ms 15772 KB Output is correct
40 Correct 166 ms 15752 KB Output is correct
41 Correct 189 ms 16120 KB Output is correct
42 Correct 145 ms 16700 KB Output is correct
43 Correct 84 ms 15860 KB Output is correct
44 Correct 73 ms 15892 KB Output is correct
45 Correct 142 ms 18464 KB Output is correct
46 Correct 115 ms 22308 KB Output is correct
47 Correct 195 ms 22808 KB Output is correct
48 Correct 311 ms 34076 KB Output is correct
49 Correct 284 ms 33036 KB Output is correct
50 Correct 221 ms 22812 KB Output is correct
51 Correct 200 ms 22808 KB Output is correct
52 Correct 236 ms 22820 KB Output is correct
53 Correct 260 ms 21576 KB Output is correct
54 Correct 228 ms 22444 KB Output is correct
55 Correct 15 ms 9676 KB Output is correct
56 Correct 16 ms 9676 KB Output is correct
57 Correct 91 ms 16836 KB Output is correct
58 Correct 50 ms 17076 KB Output is correct
59 Correct 119 ms 22356 KB Output is correct
60 Correct 517 ms 35352 KB Output is correct
61 Correct 227 ms 23200 KB Output is correct
62 Correct 243 ms 24776 KB Output is correct
63 Correct 323 ms 24772 KB Output is correct
64 Correct 614 ms 25020 KB Output is correct
65 Correct 313 ms 23616 KB Output is correct
66 Correct 432 ms 31356 KB Output is correct
67 Correct 138 ms 26284 KB Output is correct
68 Correct 316 ms 24512 KB Output is correct
69 Correct 296 ms 24640 KB Output is correct
70 Correct 308 ms 23932 KB Output is correct