oj.uz

Submission #993616

# Submission time Handle Problem Language Result Execution time Memory
993616 2024-06-06T08:41:56 Z poqmen Highway Tolls (IOI18_highway) C++14
51 / 100
 257 ms 262144 KB 
#include "highway.h"

#include <bits/stdc++.h>
using namespace std;
void find_pair(int n, vector<int> u, vector<int> v, int a, int b) {
  vector<vector<int>> adj(n);
  int m = u.size();
  for (int i = 0; i < m; ++i)
    adj[u[i]].push_back(v[i]), adj[v[i]].push_back(u[i]);
  vector<int> in(n);
  vector<int> dfs_ord;
  int s = -1;
  int t = 0;
  function<void(int, int)> dfs = [&](int node, int par) {
    dfs_ord.push_back(node);
    in[node] = t++;
    for (auto v : adj[node]) {
      if (v == par) continue;
      if (v == s) continue;
      dfs(v, node);
    }
  };
  dfs(0, -1);
  // subgraph w. only verts with in[i] < t
  // t = tl -> len ineq.
  // t = th -> len eq.
  int tl = 0, th = t;
  vector<int> hl(m, 0);
  int64_t req_d = ask(hl);
  while (tl + 1 < th) {
    int tm = (tl + th) / 2;
    for (int i = 0; i < m; ++i) {
      hl[i] = in[u[i]] >= tm || in[v[i]] >= tm;
    }
    if (ask(hl) == req_d) {
      th = tm;
    } else {
      tl = tm;
    }
  }
  s = dfs_ord[tl];
  dfs_ord.clear();
  in.assign(n, -1);
  t = 0;
  dfs(s, -1);
  hl.assign(m, 1);
  tl = 0, th = t;
  req_d = ask(hl);
  while (tl + 1 < th) {
    int tm = (tl + th) / 2;
    for (int i = 0; i < m; ++i) {
      hl[i] = in[u[i]] < tm && in[v[i]] < tm;
    }
    if (ask(hl) == req_d) {
      th = tm;
    } else {
      tl = tm;
    }
  }
  t = dfs_ord[tl];
  answer(s, t);
}

#ifndef EVAL
#include "grader.cpp"
#endif

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 1 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 10 ms 1112 KB Output is correct
3 Correct 91 ms 8060 KB Output is correct
4 Correct 106 ms 8296 KB Output is correct
5 Correct 92 ms 8108 KB Output is correct
6 Correct 107 ms 8052 KB Output is correct
7 Correct 97 ms 8056 KB Output is correct
8 Correct 90 ms 8044 KB Output is correct
9 Correct 111 ms 8048 KB Output is correct
10 Correct 95 ms 8512 KB Output is correct
11 Correct 110 ms 9668 KB Output is correct
12 Correct 104 ms 10644 KB Output is correct
13 Correct 110 ms 9824 KB Output is correct
14 Correct 99 ms 9952 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1880 KB Output is correct
2 Correct 16 ms 3672 KB Output is correct
3 Correct 24 ms 5268 KB Output is correct
4 Correct 72 ms 14996 KB Output is correct
5 Correct 69 ms 15008 KB Output is correct
6 Correct 74 ms 14992 KB Output is correct
7 Correct 76 ms 15004 KB Output is correct
8 Correct 68 ms 14996 KB Output is correct
9 Correct 76 ms 14992 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 9 ms 1276 KB Output is correct
3 Correct 73 ms 6408 KB Output is correct
4 Correct 103 ms 8060 KB Output is correct
5 Correct 91 ms 8048 KB Output is correct
6 Correct 92 ms 8312 KB Output is correct
7 Correct 89 ms 8056 KB Output is correct
8 Correct 92 ms 8236 KB Output is correct
9 Correct 110 ms 8052 KB Output is correct
10 Correct 113 ms 8064 KB Output is correct
11 Correct 107 ms 9236 KB Output is correct
12 Correct 106 ms 10508 KB Output is correct
13 Correct 113 ms 9984 KB Output is correct
14 Correct 109 ms 10448 KB Output is correct
15 Correct 80 ms 8068 KB Output is correct
16 Correct 96 ms 8076 KB Output is correct
17 Correct 101 ms 10108 KB Output is correct
18 Correct 101 ms 10232 KB Output is correct
19 Correct 97 ms 8052 KB Output is correct
20 Correct 113 ms 11028 KB Output is correct
21 Correct 80 ms 8316 KB Output is correct
22 Correct 73 ms 8324 KB Output is correct
23 Correct 81 ms 8504 KB Output is correct
24 Correct 98 ms 9056 KB Output is correct
25 Correct 100 ms 14264 KB Output is correct

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 257 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 215 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -