oj.uz

Submission #998338

# Submission time Handle Problem Language Result Execution time Memory
998338 2024-06-13T16:01:10 Z Nailuj_217 Race (IOI11_race) C++17
21 / 100
 154 ms 38656 KB 
#include <bits/stdc++.h>
#define l long long
using namespace std;


#ifdef EVAL
#include "race.h"
#else
#include "grader.cpp"
#endif

const l LEN = 300005;

array<vector<pair<l, l>>, LEN> adj;
array<bool, LEN> processed;
array<l, LEN> subset;

l best;

l subsetsize(l n, l p = -1) {
  l sum = 1;
  for (auto [a, b]: adj[n]) {
    if (!processed[a] && a != p) sum += subsetsize(a, n);
  }
  return subset[n] = sum;
}

l find_centroid(l n, l s, l p = -1) {
  for (auto [a, b]: adj[n]) {
    if (subset[a] >= s/2 && a != p && !processed[a]) return find_centroid(a, s, n);
  }
  return n;
}

void explore_branch(l n, map<l, l>* branch, l k, l maxk, l c = 1, l p = -1) {
  if (k > maxk) return;


  if (branch->find(k) != branch->end()) (*branch)[k] = min((*branch)[k], c);
  else branch->insert({k, c}); 


  for (auto [a, b]: adj[n]) {
    if (processed[a] || a == p) continue;
    explore_branch(a, branch, k+b, maxk, c+1, n);
  }
    
    return;
}



l central_decomposition(l n, l k) {
  l centroid = find_centroid(n, subsetsize(n));
  processed[centroid] = true;

  // try unordered if performance problems

  map<l, l> full;
  map<l, l> branch;

  for (auto [a, b]: adj[centroid]) {
    if (processed[a]) continue;

    explore_branch(a, &branch, b, k);

    if (branch.size() > full.size()) swap(branch, full);

    for (auto [key, val]: branch) {
      if (key > k) continue;
      if (key == k) best = min(best, val);
      else if (full.find(k-key) != full.end()) best = min(best, val + full[k-key]);
    }
    
    full.merge(branch);
    branch.clear();

  }


  for (auto [a, b]: adj[centroid])
    if (!processed[a])
      central_decomposition(a, k);

  return best;

}





int best_path(int N, int K, int H[][2], int L[]) {

  if (N == 1) return -1;


  adj.fill({});
  processed.fill(0);
  best = 1LL<<60;

  for (int i = 0; i < N-1; i++) {
    adj[H[i][0]].push_back({H[i][1], L[i]});
    adj[H[i][1]].push_back({H[i][0], L[i]});
  }

  central_decomposition(1, K);



  if (best == (1LL<<60)) return -1;
  return best;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 13656 KB Output is correct
2 Correct 3 ms 13656 KB Output is correct
3 Correct 2 ms 13660 KB Output is correct
4 Correct 3 ms 13660 KB Output is correct
5 Correct 2 ms 13660 KB Output is correct
6 Correct 2 ms 13660 KB Output is correct
7 Correct 3 ms 13660 KB Output is correct
8 Correct 3 ms 13660 KB Output is correct
9 Correct 3 ms 13660 KB Output is correct
10 Correct 2 ms 13760 KB Output is correct
11 Correct 3 ms 13660 KB Output is correct
12 Correct 2 ms 13660 KB Output is correct
13 Correct 2 ms 13660 KB Output is correct
14 Correct 2 ms 13660 KB Output is correct
15 Correct 2 ms 13780 KB Output is correct
16 Correct 2 ms 13656 KB Output is correct
17 Correct 2 ms 13660 KB Output is correct
18 Correct 3 ms 13656 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 13656 KB Output is correct
2 Correct 3 ms 13656 KB Output is correct
3 Correct 2 ms 13660 KB Output is correct
4 Correct 3 ms 13660 KB Output is correct
5 Correct 2 ms 13660 KB Output is correct
6 Correct 2 ms 13660 KB Output is correct
7 Correct 3 ms 13660 KB Output is correct
8 Correct 3 ms 13660 KB Output is correct
9 Correct 3 ms 13660 KB Output is correct
10 Correct 2 ms 13760 KB Output is correct
11 Correct 3 ms 13660 KB Output is correct
12 Correct 2 ms 13660 KB Output is correct
13 Correct 2 ms 13660 KB Output is correct
14 Correct 2 ms 13660 KB Output is correct
15 Correct 2 ms 13780 KB Output is correct
16 Correct 2 ms 13656 KB Output is correct
17 Correct 2 ms 13660 KB Output is correct
18 Correct 3 ms 13656 KB Output is correct
19 Correct 2 ms 13660 KB Output is correct
20 Correct 2 ms 13660 KB Output is correct
21 Correct 3 ms 13868 KB Output is correct
22 Correct 3 ms 13660 KB Output is correct
23 Correct 3 ms 13656 KB Output is correct
24 Correct 3 ms 13656 KB Output is correct
25 Correct 3 ms 13916 KB Output is correct
26 Correct 3 ms 13656 KB Output is correct
27 Correct 2 ms 13660 KB Output is correct
28 Correct 3 ms 13660 KB Output is correct
29 Correct 3 ms 13656 KB Output is correct
30 Correct 3 ms 13916 KB Output is correct
31 Correct 3 ms 13756 KB Output is correct
32 Correct 3 ms 13916 KB Output is correct
33 Correct 3 ms 13916 KB Output is correct
34 Correct 3 ms 13660 KB Output is correct
35 Correct 2 ms 13764 KB Output is correct
36 Correct 3 ms 13660 KB Output is correct
37 Correct 3 ms 13916 KB Output is correct
38 Correct 3 ms 13916 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 13656 KB Output is correct
2 Correct 3 ms 13656 KB Output is correct
3 Correct 2 ms 13660 KB Output is correct
4 Correct 3 ms 13660 KB Output is correct
5 Correct 2 ms 13660 KB Output is correct
6 Correct 2 ms 13660 KB Output is correct
7 Correct 3 ms 13660 KB Output is correct
8 Correct 3 ms 13660 KB Output is correct
9 Correct 3 ms 13660 KB Output is correct
10 Correct 2 ms 13760 KB Output is correct
11 Correct 3 ms 13660 KB Output is correct
12 Correct 2 ms 13660 KB Output is correct
13 Correct 2 ms 13660 KB Output is correct
14 Correct 2 ms 13660 KB Output is correct
15 Correct 2 ms 13780 KB Output is correct
16 Correct 2 ms 13656 KB Output is correct
17 Correct 2 ms 13660 KB Output is correct
18 Correct 3 ms 13656 KB Output is correct
19 Correct 116 ms 21120 KB Output is correct
20 Correct 118 ms 21112 KB Output is correct
21 Correct 121 ms 21076 KB Output is correct
22 Correct 114 ms 21164 KB Output is correct
23 Correct 50 ms 21336 KB Output is correct
24 Correct 48 ms 22000 KB Output is correct
25 Correct 83 ms 27556 KB Output is correct
26 Correct 61 ms 27568 KB Output is correct
27 Correct 117 ms 28240 KB Output is correct
28 Correct 154 ms 38656 KB Output is correct
29 Correct 136 ms 34900 KB Output is correct
30 Correct 120 ms 28752 KB Output is correct
31 Correct 120 ms 28756 KB Output is correct
32 Incorrect 122 ms 28664 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 13656 KB Output is correct
2 Correct 3 ms 13656 KB Output is correct
3 Correct 2 ms 13660 KB Output is correct
4 Correct 3 ms 13660 KB Output is correct
5 Correct 2 ms 13660 KB Output is correct
6 Correct 2 ms 13660 KB Output is correct
7 Correct 3 ms 13660 KB Output is correct
8 Correct 3 ms 13660 KB Output is correct
9 Correct 3 ms 13660 KB Output is correct
10 Correct 2 ms 13760 KB Output is correct
11 Correct 3 ms 13660 KB Output is correct
12 Correct 2 ms 13660 KB Output is correct
13 Correct 2 ms 13660 KB Output is correct
14 Correct 2 ms 13660 KB Output is correct
15 Correct 2 ms 13780 KB Output is correct
16 Correct 2 ms 13656 KB Output is correct
17 Correct 2 ms 13660 KB Output is correct
18 Correct 3 ms 13656 KB Output is correct
19 Correct 2 ms 13660 KB Output is correct
20 Correct 2 ms 13660 KB Output is correct
21 Correct 3 ms 13868 KB Output is correct
22 Correct 3 ms 13660 KB Output is correct
23 Correct 3 ms 13656 KB Output is correct
24 Correct 3 ms 13656 KB Output is correct
25 Correct 3 ms 13916 KB Output is correct
26 Correct 3 ms 13656 KB Output is correct
27 Correct 2 ms 13660 KB Output is correct
28 Correct 3 ms 13660 KB Output is correct
29 Correct 3 ms 13656 KB Output is correct
30 Correct 3 ms 13916 KB Output is correct
31 Correct 3 ms 13756 KB Output is correct
32 Correct 3 ms 13916 KB Output is correct
33 Correct 3 ms 13916 KB Output is correct
34 Correct 3 ms 13660 KB Output is correct
35 Correct 2 ms 13764 KB Output is correct
36 Correct 3 ms 13660 KB Output is correct
37 Correct 3 ms 13916 KB Output is correct
38 Correct 3 ms 13916 KB Output is correct
39 Correct 116 ms 21120 KB Output is correct
40 Correct 118 ms 21112 KB Output is correct
41 Correct 121 ms 21076 KB Output is correct
42 Correct 114 ms 21164 KB Output is correct
43 Correct 50 ms 21336 KB Output is correct
44 Correct 48 ms 22000 KB Output is correct
45 Correct 83 ms 27556 KB Output is correct
46 Correct 61 ms 27568 KB Output is correct
47 Correct 117 ms 28240 KB Output is correct
48 Correct 154 ms 38656 KB Output is correct
49 Correct 136 ms 34900 KB Output is correct
50 Correct 120 ms 28752 KB Output is correct
51 Correct 120 ms 28756 KB Output is correct
52 Incorrect 122 ms 28664 KB Output isn't correct
53 Halted 0 ms 0 KB -