oj.uz

Submission #1037434

# Submission time Handle Problem Language Result Execution time Memory
1037434 2024-07-28T21:04:13 Z aaaaaarroz Highway Tolls (IOI18_highway) C++17
51 / 100
 172 ms 262144 KB 
#include <bits/stdc++.h>	
#include "highway.h"
using namespace std;
typedef long long ll;
int edgeCnt;
vector<vector<pair<int, int>>> adj;
vector<pair<int, pair<int, int>>> edges;
void find_distances(int index, int last, int dist){
  dist += 1;
  for (auto node : adj[index]){
    if (node.first == last) continue;
    edges.push_back({dist, node});
    find_distances(node.first, index, dist);
  }
}
int find_S(ll dist){
  find_distances(0, 0, 0);
  sort(edges.begin(), edges.end());
  int l = 0, r = edgeCnt - 1;
  while (l < r){
    int c = (l + r + 1) / 2;
    vector<int> w(edgeCnt);
    for (int i = c; i <= r; i++)
      w[edges[i].second.second] = 1;

    ll cur_dist = ask(w);
    if (cur_dist == dist)
      r = c - 1;
    else
      l = c;
  }
  return edges[l].second.first;
}
int bfs_dist;
vector<pair<int, int>> sus_edges;
void find_sus_edges(int index, int last, int dist){
  dist += 1;
  for (auto node : adj[index]){
    if (node.first == last) continue;
    if (dist == bfs_dist)
      sus_edges.push_back(node);
    else
      find_sus_edges(node.first, index, dist);
  }
}
int find_T(int root, ll dist){
  find_sus_edges(root, root, 0);
  int l = 0, r = sus_edges.size() - 1;
  while (l < r){
    int c = (l + r + 1) / 2;
    vector<int> w(edgeCnt);
    for (int i = c; i <= r; i++)
      w[sus_edges[i].second] = 1;

    ll cur_dist = ask(w);
    if (cur_dist == dist)
      r = c - 1;
    else
      l = c;
  }
  return sus_edges[l].first;
}
void find_pair(int N, vector<int> U, vector<int> V, int A, int B){
  edgeCnt = U.size();
  adj = vector<vector<pair<int, int>>>(N);
  for (int i = 0; i < edgeCnt; i++){
    adj[U[i]].push_back({V[i], i});
    adj[V[i]].push_back({U[i], i});
  }
  ll dist = ask(vector<int>(edgeCnt));
  bfs_dist = dist / A;
  int S = find_S(dist);
  int T = find_T(S, dist);
  answer(S, T);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 8 ms 1500 KB Output is correct
3 Correct 95 ms 9240 KB Output is correct
4 Correct 77 ms 9100 KB Output is correct
5 Correct 84 ms 9104 KB Output is correct
6 Correct 73 ms 9068 KB Output is correct
7 Correct 78 ms 9084 KB Output is correct
8 Correct 79 ms 9248 KB Output is correct
9 Correct 77 ms 9068 KB Output is correct
10 Correct 81 ms 9244 KB Output is correct
11 Correct 85 ms 10892 KB Output is correct
12 Correct 74 ms 11496 KB Output is correct
13 Correct 80 ms 11136 KB Output is correct
14 Correct 78 ms 10212 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 2536 KB Output is correct
2 Correct 15 ms 4308 KB Output is correct
3 Correct 25 ms 6352 KB Output is correct
4 Correct 76 ms 18040 KB Output is correct
5 Correct 65 ms 18024 KB Output is correct
6 Correct 65 ms 18028 KB Output is correct
7 Correct 65 ms 18024 KB Output is correct
8 Correct 61 ms 17892 KB Output is correct
9 Correct 65 ms 18040 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 8 ms 1368 KB Output is correct
3 Correct 53 ms 7492 KB Output is correct
4 Correct 69 ms 9068 KB Output is correct
5 Correct 66 ms 9068 KB Output is correct
6 Correct 65 ms 9016 KB Output is correct
7 Correct 66 ms 9072 KB Output is correct
8 Correct 76 ms 9104 KB Output is correct
9 Correct 81 ms 9168 KB Output is correct
10 Correct 78 ms 9068 KB Output is correct
11 Correct 80 ms 10172 KB Output is correct
12 Correct 88 ms 12172 KB Output is correct
13 Correct 76 ms 11372 KB Output is correct
14 Correct 74 ms 11624 KB Output is correct
15 Correct 72 ms 9068 KB Output is correct
16 Correct 74 ms 9068 KB Output is correct
17 Correct 79 ms 11644 KB Output is correct
18 Correct 73 ms 10860 KB Output is correct
19 Correct 62 ms 9068 KB Output is correct
20 Correct 75 ms 12908 KB Output is correct
21 Correct 72 ms 10352 KB Output is correct
22 Correct 82 ms 10128 KB Output is correct
23 Correct 70 ms 9516 KB Output is correct
24 Correct 88 ms 10332 KB Output is correct
25 Correct 82 ms 16628 KB Output is correct

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 172 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Runtime error 153 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -