oj.uz

Submission #823367

# Submission time Handle Problem Language Result Execution time Memory
823367 2023-08-12T11:56:59 Z KoD Highway Tolls (IOI18_highway) C++17
100 / 100
 206 ms 8936 KB 
#include "highway.h"
#include <bits/stdc++.h>
using namespace std;

template <class F> int binary_search(int ok, int ng, int md, const F& f) {
  while (abs(ok - ng) > 1) {
    (f(md) ? ok : ng) = md;
    md = (ok + ng) / 2;
  }
  return ok;
}

void find_pair(int N, vector<int> U, vector<int> V, int A, int B) {
  const int M = (int)U.size();
  vector<vector<int>> G(N);
  for (int i = 0; i < M; ++i) {
    G[U[i]].push_back(i);
    G[V[i]].push_back(i);
  }
  vector<char> dead(N);
  const auto bfs_order = [&](int src) {
    vector<int> ret;
    vector<char> done(N);
    queue<int> que;
    ret.reserve(N);
    const auto push = [&](int u) {
      if (!dead[u] && !done[u]) {
        done[u] = true;
        ret.push_back(u);
        que.push(u);
      }
    };
    push(src);
    while (!que.empty()) {
      const int u = que.front();
      que.pop();
      for (const int e : G[u]) {
        push(u ^ U[e] ^ V[e]);
      }
    }
    return ret;
  };
  const long long best = ask(vector(M, 0));
  const int P = binary_search(0, N, N / 3, [&](int thres) {
    vector<int> w(M);
    for (int i = 0; i < thres; ++i) {
      for (const int e : G[i]) w[e] = 1;
    }
    return ask(w) == best;
  });
  for (int i = 0; i < P; ++i) dead[i] = true;
  const int S = [&] {
    const auto ord = bfs_order(P);
    const int n = (int)ord.size();
    const int k = binary_search(n, 0, 2 * n / 3, [&](int thres) {
      vector<int> w(M);
      for (int i = thres; i < n; ++i) {
        for (const int e : G[ord[i]]) w[e] = 1;
      }
      for (int i = 0; i < N; ++i) {
        if (dead[i]) {
          for (const int e : G[i]) w[e] = 1;
        }
      }
      return ask(w) == best;
    });
    for (int i = k; i < n; ++i) dead[ord[i]] = true;
    return ord[k - 1];
  }();
  const int T = [&] {
    const auto ord = bfs_order(S);
    const int n = (int)ord.size();
    const int k = binary_search(n, 0, 2 * n / 3, [&](int thres) {
      vector<int> w(M);
      for (int i = thres; i < n; ++i) {
        for (const int e : G[ord[i]]) w[e] = 1;
      }
      for (int i = 0; i < N; ++i) {
        if (dead[i]) {
          for (const int e : G[i]) w[e] = 1;
        }
      }
      return ask(w) == best;
    });
    for (int i = k; i < n; ++i) dead[ord[i]] = true;
    return ord[k - 1];
  }();
  answer(S, T);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 208 KB Output is correct
7 Correct 0 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 208 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 368 KB Output is correct
2 Correct 13 ms 1076 KB Output is correct
3 Correct 128 ms 7660 KB Output is correct
4 Correct 109 ms 7664 KB Output is correct
5 Correct 138 ms 7764 KB Output is correct
6 Correct 105 ms 7664 KB Output is correct
7 Correct 107 ms 7672 KB Output is correct
8 Correct 141 ms 7680 KB Output is correct
9 Correct 102 ms 7668 KB Output is correct
10 Correct 112 ms 7680 KB Output is correct
11 Correct 146 ms 7524 KB Output is correct
12 Correct 134 ms 7540 KB Output is correct
13 Correct 129 ms 7512 KB Output is correct
14 Correct 105 ms 7540 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 1140 KB Output is correct
2 Correct 21 ms 1952 KB Output is correct
3 Correct 34 ms 2688 KB Output is correct
4 Correct 108 ms 7432 KB Output is correct
5 Correct 114 ms 7460 KB Output is correct
6 Correct 112 ms 7460 KB Output is correct
7 Correct 65 ms 7428 KB Output is correct
8 Correct 87 ms 7436 KB Output is correct
9 Correct 76 ms 7444 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 12 ms 1160 KB Output is correct
3 Correct 74 ms 5964 KB Output is correct
4 Correct 115 ms 7552 KB Output is correct
5 Correct 132 ms 7560 KB Output is correct
6 Correct 98 ms 7528 KB Output is correct
7 Correct 106 ms 7564 KB Output is correct
8 Correct 99 ms 7540 KB Output is correct
9 Correct 153 ms 7584 KB Output is correct
10 Correct 138 ms 7728 KB Output is correct
11 Correct 81 ms 7436 KB Output is correct
12 Correct 127 ms 7468 KB Output is correct
13 Correct 129 ms 7440 KB Output is correct
14 Correct 109 ms 7440 KB Output is correct
15 Correct 124 ms 7780 KB Output is correct
16 Correct 123 ms 7556 KB Output is correct
17 Correct 116 ms 7448 KB Output is correct
18 Correct 79 ms 7436 KB Output is correct
19 Correct 118 ms 7540 KB Output is correct
20 Correct 93 ms 7440 KB Output is correct
21 Correct 117 ms 7824 KB Output is correct
22 Correct 137 ms 7812 KB Output is correct
23 Correct 77 ms 8060 KB Output is correct
24 Correct 91 ms 8016 KB Output is correct
25 Correct 146 ms 7664 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 1104 KB Output is correct
2 Correct 16 ms 1104 KB Output is correct
3 Correct 120 ms 8004 KB Output is correct
4 Correct 203 ms 8160 KB Output is correct
5 Correct 172 ms 8760 KB Output is correct
6 Correct 190 ms 8668 KB Output is correct
7 Correct 175 ms 8676 KB Output is correct
8 Correct 206 ms 8704 KB Output is correct
9 Correct 162 ms 5488 KB Output is correct
10 Correct 112 ms 5824 KB Output is correct
11 Correct 127 ms 6028 KB Output is correct
12 Correct 180 ms 7844 KB Output is correct
13 Correct 194 ms 8232 KB Output is correct
14 Correct 138 ms 8492 KB Output is correct
15 Correct 174 ms 8528 KB Output is correct
16 Correct 133 ms 6396 KB Output is correct
17 Correct 124 ms 7960 KB Output is correct
18 Correct 123 ms 7960 KB Output is correct
19 Correct 87 ms 7984 KB Output is correct
20 Correct 90 ms 8000 KB Output is correct
21 Correct 186 ms 8552 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 1076 KB Output is correct
2 Correct 15 ms 1188 KB Output is correct
3 Correct 137 ms 7904 KB Output is correct
4 Correct 164 ms 8012 KB Output is correct
5 Correct 190 ms 8132 KB Output is correct
6 Correct 172 ms 8688 KB Output is correct
7 Correct 121 ms 7880 KB Output is correct
8 Correct 121 ms 8048 KB Output is correct
9 Correct 131 ms 8252 KB Output is correct
10 Correct 186 ms 8684 KB Output is correct
11 Correct 190 ms 8680 KB Output is correct
12 Correct 166 ms 8852 KB Output is correct
13 Correct 114 ms 6024 KB Output is correct
14 Correct 103 ms 5652 KB Output is correct
15 Correct 100 ms 6012 KB Output is correct
16 Correct 130 ms 5668 KB Output is correct
17 Correct 100 ms 6060 KB Output is correct
18 Correct 142 ms 5648 KB Output is correct
19 Correct 128 ms 7792 KB Output is correct
20 Correct 136 ms 8112 KB Output is correct
21 Correct 134 ms 8528 KB Output is correct
22 Correct 175 ms 8452 KB Output is correct
23 Correct 150 ms 8536 KB Output is correct
24 Correct 129 ms 8508 KB Output is correct
25 Correct 134 ms 8484 KB Output is correct
26 Correct 158 ms 8552 KB Output is correct
27 Correct 117 ms 7968 KB Output is correct
28 Correct 88 ms 7908 KB Output is correct
29 Correct 111 ms 8052 KB Output is correct
30 Correct 104 ms 7956 KB Output is correct
31 Correct 121 ms 7948 KB Output is correct
32 Correct 117 ms 7864 KB Output is correct
33 Correct 98 ms 8052 KB Output is correct
34 Correct 137 ms 8008 KB Output is correct
35 Correct 96 ms 8028 KB Output is correct
36 Correct 128 ms 7860 KB Output is correct
37 Correct 103 ms 8024 KB Output is correct
38 Correct 97 ms 7992 KB Output is correct
39 Correct 157 ms 8532 KB Output is correct
40 Correct 148 ms 8524 KB Output is correct
41 Correct 144 ms 8908 KB Output is correct
42 Correct 163 ms 8936 KB Output is correct