oj.uz

답안 #1115067

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1115067 2024-11-20T01:22:06 Z gustavo_d 경주 (Race) (IOI11_race) C++17
21 / 100
 3000 ms 49168 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) 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() == 3) 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; i<(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});
    }
 
    decomp(0);
 
    return (ans == (int)1e8 ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 35152 KB Output is correct
2 Correct 20 ms 35152 KB Output is correct
3 Correct 20 ms 35116 KB Output is correct
4 Correct 19 ms 35328 KB Output is correct
5 Correct 19 ms 35152 KB Output is correct
6 Correct 21 ms 35152 KB Output is correct
7 Correct 22 ms 35152 KB Output is correct
8 Correct 21 ms 35188 KB Output is correct
9 Correct 21 ms 35116 KB Output is correct
10 Correct 22 ms 35152 KB Output is correct
11 Correct 21 ms 35164 KB Output is correct
12 Correct 20 ms 35152 KB Output is correct
13 Correct 21 ms 35152 KB Output is correct
14 Correct 21 ms 35152 KB Output is correct
15 Correct 20 ms 35152 KB Output is correct
16 Correct 25 ms 35152 KB Output is correct
17 Correct 22 ms 35152 KB Output is correct
18 Correct 21 ms 35372 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 35152 KB Output is correct
2 Correct 20 ms 35152 KB Output is correct
3 Correct 20 ms 35116 KB Output is correct
4 Correct 19 ms 35328 KB Output is correct
5 Correct 19 ms 35152 KB Output is correct
6 Correct 21 ms 35152 KB Output is correct
7 Correct 22 ms 35152 KB Output is correct
8 Correct 21 ms 35188 KB Output is correct
9 Correct 21 ms 35116 KB Output is correct
10 Correct 22 ms 35152 KB Output is correct
11 Correct 21 ms 35164 KB Output is correct
12 Correct 20 ms 35152 KB Output is correct
13 Correct 21 ms 35152 KB Output is correct
14 Correct 21 ms 35152 KB Output is correct
15 Correct 20 ms 35152 KB Output is correct
16 Correct 25 ms 35152 KB Output is correct
17 Correct 22 ms 35152 KB Output is correct
18 Correct 21 ms 35372 KB Output is correct
19 Correct 21 ms 35132 KB Output is correct
20 Correct 22 ms 35168 KB Output is correct
21 Correct 23 ms 35408 KB Output is correct
22 Correct 21 ms 35408 KB Output is correct
23 Correct 25 ms 35408 KB Output is correct
24 Correct 21 ms 35408 KB Output is correct
25 Correct 23 ms 35676 KB Output is correct
26 Correct 21 ms 35408 KB Output is correct
27 Correct 21 ms 35152 KB Output is correct
28 Correct 23 ms 35408 KB Output is correct
29 Correct 22 ms 35408 KB Output is correct
30 Correct 22 ms 35556 KB Output is correct
31 Correct 24 ms 35664 KB Output is correct
32 Correct 23 ms 35664 KB Output is correct
33 Correct 29 ms 35656 KB Output is correct
34 Correct 25 ms 35920 KB Output is correct
35 Correct 28 ms 36168 KB Output is correct
36 Correct 27 ms 36176 KB Output is correct
37 Correct 38 ms 37968 KB Output is correct
38 Correct 40 ms 36944 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 35152 KB Output is correct
2 Correct 20 ms 35152 KB Output is correct
3 Correct 20 ms 35116 KB Output is correct
4 Correct 19 ms 35328 KB Output is correct
5 Correct 19 ms 35152 KB Output is correct
6 Correct 21 ms 35152 KB Output is correct
7 Correct 22 ms 35152 KB Output is correct
8 Correct 21 ms 35188 KB Output is correct
9 Correct 21 ms 35116 KB Output is correct
10 Correct 22 ms 35152 KB Output is correct
11 Correct 21 ms 35164 KB Output is correct
12 Correct 20 ms 35152 KB Output is correct
13 Correct 21 ms 35152 KB Output is correct
14 Correct 21 ms 35152 KB Output is correct
15 Correct 20 ms 35152 KB Output is correct
16 Correct 25 ms 35152 KB Output is correct
17 Correct 22 ms 35152 KB Output is correct
18 Correct 21 ms 35372 KB Output is correct
19 Correct 236 ms 40528 KB Output is correct
20 Correct 236 ms 40676 KB Output is correct
21 Correct 236 ms 41320 KB Output is correct
22 Correct 160 ms 42304 KB Output is correct
23 Correct 85 ms 40316 KB Output is correct
24 Correct 62 ms 40264 KB Output is correct
25 Execution timed out 3066 ms 49168 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 35152 KB Output is correct
2 Correct 20 ms 35152 KB Output is correct
3 Correct 20 ms 35116 KB Output is correct
4 Correct 19 ms 35328 KB Output is correct
5 Correct 19 ms 35152 KB Output is correct
6 Correct 21 ms 35152 KB Output is correct
7 Correct 22 ms 35152 KB Output is correct
8 Correct 21 ms 35188 KB Output is correct
9 Correct 21 ms 35116 KB Output is correct
10 Correct 22 ms 35152 KB Output is correct
11 Correct 21 ms 35164 KB Output is correct
12 Correct 20 ms 35152 KB Output is correct
13 Correct 21 ms 35152 KB Output is correct
14 Correct 21 ms 35152 KB Output is correct
15 Correct 20 ms 35152 KB Output is correct
16 Correct 25 ms 35152 KB Output is correct
17 Correct 22 ms 35152 KB Output is correct
18 Correct 21 ms 35372 KB Output is correct
19 Correct 21 ms 35132 KB Output is correct
20 Correct 22 ms 35168 KB Output is correct
21 Correct 23 ms 35408 KB Output is correct
22 Correct 21 ms 35408 KB Output is correct
23 Correct 25 ms 35408 KB Output is correct
24 Correct 21 ms 35408 KB Output is correct
25 Correct 23 ms 35676 KB Output is correct
26 Correct 21 ms 35408 KB Output is correct
27 Correct 21 ms 35152 KB Output is correct
28 Correct 23 ms 35408 KB Output is correct
29 Correct 22 ms 35408 KB Output is correct
30 Correct 22 ms 35556 KB Output is correct
31 Correct 24 ms 35664 KB Output is correct
32 Correct 23 ms 35664 KB Output is correct
33 Correct 29 ms 35656 KB Output is correct
34 Correct 25 ms 35920 KB Output is correct
35 Correct 28 ms 36168 KB Output is correct
36 Correct 27 ms 36176 KB Output is correct
37 Correct 38 ms 37968 KB Output is correct
38 Correct 40 ms 36944 KB Output is correct
39 Correct 236 ms 40528 KB Output is correct
40 Correct 236 ms 40676 KB Output is correct
41 Correct 236 ms 41320 KB Output is correct
42 Correct 160 ms 42304 KB Output is correct
43 Correct 85 ms 40316 KB Output is correct
44 Correct 62 ms 40264 KB Output is correct
45 Execution timed out 3066 ms 49168 KB Time limit exceeded
46 Halted 0 ms 0 KB -