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답안 #151573

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
151573 2019-09-03T15:09:03 Z AlexPop28 경주 (Race) (IOI11_race) C++11
100 / 100
 593 ms 87088 KB 
#include <bits/stdc++.h>
#include "race.h"

using namespace std;

const int INF = (int)1e9;

struct MinMaxMerge {
  map<int, int> dist;
  int lazy_weight, lazy_edges;
  MinMaxMerge() : lazy_weight(0), lazy_edges(0) {
    dist.clear();
  }
};

struct Solver {
  Solver(int k_, const vector<vector<pair<int, int>>> &adj_) :
    n(adj_.size()), k(k_), adj(adj_) {}
  int n, k, ans = INF;
  vector<vector<pair<int, int>>> adj;

  void Merge(MinMaxMerge &curr, MinMaxMerge &him) {
    if (curr.dist.size() < him.dist.size()) {
      swap(curr, him);
    }
    for (auto &p : him.dist) {
      int real_weight = p.first + him.lazy_weight;
      int real_edges = p.second + him.lazy_edges;
      int search = k - real_weight - curr.lazy_weight;
      if (curr.dist.count(search)) {
        ans = min(ans, curr.dist[search] + curr.lazy_edges + real_edges);
      }
    }
    for (auto &p : him.dist) {
      int dist = p.first + him.lazy_weight - curr.lazy_weight;
      int edges = p.second + him.lazy_edges - curr.lazy_edges;
      if (curr.dist.count(dist)) {
        curr.dist[dist] = min(curr.dist[dist], edges);
      } else {
        curr.dist[dist] = edges;
      }
    }
  }

  MinMaxMerge DFS(int node, int parent) {
    MinMaxMerge curr;
    curr.dist[0] = 0;
    for (auto &p : adj[node]) if (p.first != parent) {
      auto him = DFS(p.first, node);
      him.lazy_weight += p.second;
      ++him.lazy_edges;
      Merge(curr, him);
    }
    return curr;
  }

  int Solve() {
    DFS(0, -1);
    return ans == INF ? -1 : ans;
  }
};

int best_path(int n, int k, int H[][2], int L[]) {
  vector<vector<pair<int, int>>> adj(n);
  for (int i = 0; i < n - 1; ++i) {
    adj[H[i][0]].emplace_back(H[i][1], L[i]);
    adj[H[i][1]].emplace_back(H[i][0], L[i]);
  }
  Solver solver(k, adj);
  return solver.Solve();
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 380 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 380 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 380 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 380 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 3 ms 504 KB Output is correct
22 Correct 4 ms 504 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 4 ms 504 KB Output is correct
25 Correct 4 ms 504 KB Output is correct
26 Correct 4 ms 504 KB Output is correct
27 Correct 3 ms 504 KB Output is correct
28 Correct 3 ms 508 KB Output is correct
29 Correct 4 ms 504 KB Output is correct
30 Correct 4 ms 508 KB Output is correct
31 Correct 3 ms 508 KB Output is correct
32 Correct 3 ms 504 KB Output is correct
33 Correct 4 ms 504 KB Output is correct
34 Correct 3 ms 504 KB Output is correct
35 Correct 3 ms 504 KB Output is correct
36 Correct 3 ms 532 KB Output is correct
37 Correct 3 ms 504 KB Output is correct
38 Correct 3 ms 504 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 380 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 380 KB Output is correct
19 Correct 161 ms 14628 KB Output is correct
20 Correct 147 ms 14628 KB Output is correct
21 Correct 146 ms 14728 KB Output is correct
22 Correct 159 ms 14712 KB Output is correct
23 Correct 196 ms 14968 KB Output is correct
24 Correct 164 ms 15472 KB Output is correct
25 Correct 148 ms 29780 KB Output is correct
26 Correct 96 ms 43500 KB Output is correct
27 Correct 262 ms 29904 KB Output is correct
28 Correct 472 ms 87088 KB Output is correct
29 Correct 508 ms 84088 KB Output is correct
30 Correct 259 ms 29816 KB Output is correct
31 Correct 263 ms 29944 KB Output is correct
32 Correct 305 ms 29944 KB Output is correct
33 Correct 325 ms 28560 KB Output is correct
34 Correct 492 ms 39036 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 380 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 380 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 3 ms 504 KB Output is correct
22 Correct 4 ms 504 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 4 ms 504 KB Output is correct
25 Correct 4 ms 504 KB Output is correct
26 Correct 4 ms 504 KB Output is correct
27 Correct 3 ms 504 KB Output is correct
28 Correct 3 ms 508 KB Output is correct
29 Correct 4 ms 504 KB Output is correct
30 Correct 4 ms 508 KB Output is correct
31 Correct 3 ms 508 KB Output is correct
32 Correct 3 ms 504 KB Output is correct
33 Correct 4 ms 504 KB Output is correct
34 Correct 3 ms 504 KB Output is correct
35 Correct 3 ms 504 KB Output is correct
36 Correct 3 ms 532 KB Output is correct
37 Correct 3 ms 504 KB Output is correct
38 Correct 3 ms 504 KB Output is correct
39 Correct 161 ms 14628 KB Output is correct
40 Correct 147 ms 14628 KB Output is correct
41 Correct 146 ms 14728 KB Output is correct
42 Correct 159 ms 14712 KB Output is correct
43 Correct 196 ms 14968 KB Output is correct
44 Correct 164 ms 15472 KB Output is correct
45 Correct 148 ms 29780 KB Output is correct
46 Correct 96 ms 43500 KB Output is correct
47 Correct 262 ms 29904 KB Output is correct
48 Correct 472 ms 87088 KB Output is correct
49 Correct 508 ms 84088 KB Output is correct
50 Correct 259 ms 29816 KB Output is correct
51 Correct 263 ms 29944 KB Output is correct
52 Correct 305 ms 29944 KB Output is correct
53 Correct 325 ms 28560 KB Output is correct
54 Correct 492 ms 39036 KB Output is correct
55 Correct 20 ms 2168 KB Output is correct
56 Correct 12 ms 1912 KB Output is correct
57 Correct 82 ms 14644 KB Output is correct
58 Correct 70 ms 15040 KB Output is correct
59 Correct 153 ms 43512 KB Output is correct
60 Correct 459 ms 84920 KB Output is correct
61 Correct 300 ms 31224 KB Output is correct
62 Correct 251 ms 29836 KB Output is correct
63 Correct 296 ms 29944 KB Output is correct
64 Correct 593 ms 36216 KB Output is correct
65 Correct 588 ms 39672 KB Output is correct
66 Correct 462 ms 77432 KB Output is correct
67 Correct 235 ms 31208 KB Output is correct
68 Correct 453 ms 38392 KB Output is correct
69 Correct 485 ms 42020 KB Output is correct
70 Correct 413 ms 36836 KB Output is correct