oj.uz

답안 #1115384

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1115384 2024-11-20T12:08:48 Z gustavo_d 경주 (Race) (IOI11_race) C++17
100 / 100
 374 ms 64196 KB 
// #include "race.h"
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
 
const int MAXN = 2e5;
const int MAXV = 1e6+1;
vector<pair<int, int>> adj[MAXN];
bool vis[MAXN];
int sz[MAXN];
bool in[MAXN];
 
int n, k;
 
void dfs(int v, int pai) {
    sz[v] = 1;
    for (auto& [viz, w] : adj[v]) {
        if (viz == pai or in[viz]) continue;
        dfs(viz, v);
        sz[v] += sz[viz];
    }
}
 
int find_centroid(int v, int pai, int qty) {
    // cout << "buscando centroid " << v << endl;
    for (auto& [viz, w] : adj[v]) {
        if (viz == pai or in[viz]) continue;
        if (sz[viz] > qty / 2) return find_centroid(viz, v, qty);
    }
    // cout << "é" << v <<endl;
    return v;
}
 
vector<int> sub_mn_depth(MAXV, 1e8);
vector<pair<int, int>> dists[MAXV];
vector<int> sub_dists;
void get_dist(int v, int pai, int dist, int depth) {
    if (dist > k) return;
    sub_mn_depth[dist] = min(sub_mn_depth[dist], depth);
    sub_dists.push_back(dist);
    for (auto& [viz, w] : adj[v]) {
        if (viz == pai or in[viz]) continue;
        get_dist(viz, v, dist + w, depth+1);
    }
}
 
int ans = 1e8;
void decomp(int v) {
    dfs(v, -1);
    int centroid = find_centroid(v, -1, sz[v]);
    in[centroid] = true;
    vector<int> all_dists;
    // if (centroid == 8) cout << centroid << " é centroid decompondo" << v << endl;
    for (auto& [viz, w] : adj[centroid]) {
        if (in[viz]) continue;
        get_dist(viz, centroid, w, 1);
        for (int d : sub_dists) {
            dists[d].push_back({sub_mn_depth[d], viz});
          	sort(dists[d].begin(), dists[d].end());
          	if ((int)dists[d].size() > 2) dists[d].pop_back();
            sub_mn_depth[d] = 1e8;
            all_dists.push_back(d);
        }
        sub_dists.clear();
    }
    if (!dists[k].empty()) ans = min(ans, dists[k][0].first);
    for (auto& [viz, w] : adj[centroid]) {
        if (in[viz]) continue;
        get_dist(viz, centroid, w, 1);
        for (int d : sub_dists) {
            for (int i=0; d <= k and i<min(2, (int)dists[k-d].size()); i++) {
                if (dists[k-d][i].second == viz) continue;
                ans = min(ans, dists[k-d][i].first + sub_mn_depth[d]);
            }
            sub_mn_depth[d] = 1e8;
        }
        sub_dists.clear();
    }
    for (int d : all_dists) dists[d].clear();
    for (auto& [viz, w] : adj[centroid]) {
        if (in[viz]) continue;
        decomp(viz);
    }
}
 
int best_path(int N, int K, int H[][2], int L[]) {
    n = N; k = K;
    for (int i=0; i<N-1; i++) {
        int u = H[i][0], v = H[i][1];
        int w = L[i];
        adj[u].push_back({v, w});
        adj[v].push_back({u, w});
    }
 
    dfs(0, -1);
    decomp(0);
 
    return (ans == (int)1e8 ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 37200 KB Output is correct
2 Correct 7 ms 37200 KB Output is correct
3 Correct 7 ms 37216 KB Output is correct
4 Correct 7 ms 37200 KB Output is correct
5 Correct 7 ms 37300 KB Output is correct
6 Correct 7 ms 37384 KB Output is correct
7 Correct 7 ms 37200 KB Output is correct
8 Correct 8 ms 37200 KB Output is correct
9 Correct 7 ms 37200 KB Output is correct
10 Correct 8 ms 37492 KB Output is correct
11 Correct 7 ms 37416 KB Output is correct
12 Correct 7 ms 37200 KB Output is correct
13 Correct 8 ms 37200 KB Output is correct
14 Correct 7 ms 37200 KB Output is correct
15 Correct 7 ms 37200 KB Output is correct
16 Correct 8 ms 37200 KB Output is correct
17 Correct 7 ms 37232 KB Output is correct
18 Correct 7 ms 37200 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 37200 KB Output is correct
2 Correct 7 ms 37200 KB Output is correct
3 Correct 7 ms 37216 KB Output is correct
4 Correct 7 ms 37200 KB Output is correct
5 Correct 7 ms 37300 KB Output is correct
6 Correct 7 ms 37384 KB Output is correct
7 Correct 7 ms 37200 KB Output is correct
8 Correct 8 ms 37200 KB Output is correct
9 Correct 7 ms 37200 KB Output is correct
10 Correct 8 ms 37492 KB Output is correct
11 Correct 7 ms 37416 KB Output is correct
12 Correct 7 ms 37200 KB Output is correct
13 Correct 8 ms 37200 KB Output is correct
14 Correct 7 ms 37200 KB Output is correct
15 Correct 7 ms 37200 KB Output is correct
16 Correct 8 ms 37200 KB Output is correct
17 Correct 7 ms 37232 KB Output is correct
18 Correct 7 ms 37200 KB Output is correct
19 Correct 10 ms 37200 KB Output is correct
20 Correct 8 ms 37212 KB Output is correct
21 Correct 7 ms 37200 KB Output is correct
22 Correct 8 ms 37200 KB Output is correct
23 Correct 7 ms 37200 KB Output is correct
24 Correct 7 ms 37456 KB Output is correct
25 Correct 9 ms 37456 KB Output is correct
26 Correct 8 ms 37212 KB Output is correct
27 Correct 7 ms 37200 KB Output is correct
28 Correct 9 ms 37456 KB Output is correct
29 Correct 10 ms 37456 KB Output is correct
30 Correct 8 ms 37624 KB Output is correct
31 Correct 8 ms 37456 KB Output is correct
32 Correct 8 ms 37624 KB Output is correct
33 Correct 8 ms 37588 KB Output is correct
34 Correct 8 ms 37456 KB Output is correct
35 Correct 8 ms 37456 KB Output is correct
36 Correct 8 ms 37456 KB Output is correct
37 Correct 8 ms 37456 KB Output is correct
38 Correct 8 ms 37456 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 37200 KB Output is correct
2 Correct 7 ms 37200 KB Output is correct
3 Correct 7 ms 37216 KB Output is correct
4 Correct 7 ms 37200 KB Output is correct
5 Correct 7 ms 37300 KB Output is correct
6 Correct 7 ms 37384 KB Output is correct
7 Correct 7 ms 37200 KB Output is correct
8 Correct 8 ms 37200 KB Output is correct
9 Correct 7 ms 37200 KB Output is correct
10 Correct 8 ms 37492 KB Output is correct
11 Correct 7 ms 37416 KB Output is correct
12 Correct 7 ms 37200 KB Output is correct
13 Correct 8 ms 37200 KB Output is correct
14 Correct 7 ms 37200 KB Output is correct
15 Correct 7 ms 37200 KB Output is correct
16 Correct 8 ms 37200 KB Output is correct
17 Correct 7 ms 37232 KB Output is correct
18 Correct 7 ms 37200 KB Output is correct
19 Correct 105 ms 43336 KB Output is correct
20 Correct 103 ms 43336 KB Output is correct
21 Correct 132 ms 43696 KB Output is correct
22 Correct 99 ms 44224 KB Output is correct
23 Correct 57 ms 43252 KB Output is correct
24 Correct 45 ms 43336 KB Output is correct
25 Correct 108 ms 44360 KB Output is correct
26 Correct 88 ms 46860 KB Output is correct
27 Correct 122 ms 46920 KB Output is correct
28 Correct 159 ms 52040 KB Output is correct
29 Correct 161 ms 52448 KB Output is correct
30 Correct 149 ms 47176 KB Output is correct
31 Correct 139 ms 46992 KB Output is correct
32 Correct 146 ms 48864 KB Output is correct
33 Correct 157 ms 45896 KB Output is correct
34 Correct 137 ms 45716 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 37200 KB Output is correct
2 Correct 7 ms 37200 KB Output is correct
3 Correct 7 ms 37216 KB Output is correct
4 Correct 7 ms 37200 KB Output is correct
5 Correct 7 ms 37300 KB Output is correct
6 Correct 7 ms 37384 KB Output is correct
7 Correct 7 ms 37200 KB Output is correct
8 Correct 8 ms 37200 KB Output is correct
9 Correct 7 ms 37200 KB Output is correct
10 Correct 8 ms 37492 KB Output is correct
11 Correct 7 ms 37416 KB Output is correct
12 Correct 7 ms 37200 KB Output is correct
13 Correct 8 ms 37200 KB Output is correct
14 Correct 7 ms 37200 KB Output is correct
15 Correct 7 ms 37200 KB Output is correct
16 Correct 8 ms 37200 KB Output is correct
17 Correct 7 ms 37232 KB Output is correct
18 Correct 7 ms 37200 KB Output is correct
19 Correct 10 ms 37200 KB Output is correct
20 Correct 8 ms 37212 KB Output is correct
21 Correct 7 ms 37200 KB Output is correct
22 Correct 8 ms 37200 KB Output is correct
23 Correct 7 ms 37200 KB Output is correct
24 Correct 7 ms 37456 KB Output is correct
25 Correct 9 ms 37456 KB Output is correct
26 Correct 8 ms 37212 KB Output is correct
27 Correct 7 ms 37200 KB Output is correct
28 Correct 9 ms 37456 KB Output is correct
29 Correct 10 ms 37456 KB Output is correct
30 Correct 8 ms 37624 KB Output is correct
31 Correct 8 ms 37456 KB Output is correct
32 Correct 8 ms 37624 KB Output is correct
33 Correct 8 ms 37588 KB Output is correct
34 Correct 8 ms 37456 KB Output is correct
35 Correct 8 ms 37456 KB Output is correct
36 Correct 8 ms 37456 KB Output is correct
37 Correct 8 ms 37456 KB Output is correct
38 Correct 8 ms 37456 KB Output is correct
39 Correct 105 ms 43336 KB Output is correct
40 Correct 103 ms 43336 KB Output is correct
41 Correct 132 ms 43696 KB Output is correct
42 Correct 99 ms 44224 KB Output is correct
43 Correct 57 ms 43252 KB Output is correct
44 Correct 45 ms 43336 KB Output is correct
45 Correct 108 ms 44360 KB Output is correct
46 Correct 88 ms 46860 KB Output is correct
47 Correct 122 ms 46920 KB Output is correct
48 Correct 159 ms 52040 KB Output is correct
49 Correct 161 ms 52448 KB Output is correct
50 Correct 149 ms 47176 KB Output is correct
51 Correct 139 ms 46992 KB Output is correct
52 Correct 146 ms 48864 KB Output is correct
53 Correct 157 ms 45896 KB Output is correct
54 Correct 137 ms 45716 KB Output is correct
55 Correct 17 ms 37968 KB Output is correct
56 Correct 18 ms 37788 KB Output is correct
57 Correct 82 ms 44360 KB Output is correct
58 Correct 34 ms 44228 KB Output is correct
59 Correct 102 ms 50624 KB Output is correct
60 Correct 374 ms 64196 KB Output is correct
61 Correct 152 ms 47432 KB Output is correct
62 Correct 176 ms 48320 KB Output is correct
63 Correct 176 ms 48320 KB Output is correct
64 Correct 334 ms 55552 KB Output is correct
65 Correct 121 ms 46920 KB Output is correct
66 Correct 321 ms 54812 KB Output is correct
67 Correct 81 ms 51640 KB Output is correct
68 Correct 229 ms 54164 KB Output is correct
69 Correct 264 ms 56444 KB Output is correct
70 Correct 285 ms 53628 KB Output is correct