oj.uz

Submission #839196

# Submission time Handle Problem Language Result Execution time Memory
839196 2023-08-29T03:39:54 Z asdfgrace Tropical Garden (IOI11_garden) C++17
69 / 100
 3507 ms 30512 KB 
#include <bits/stdc++.h>
#include "garden.h"
#include "gardenlib.h"
using namespace std;
 
void count_routes(int N, int M, int P, int R[][2], int Q, int G[]) {
  const int INF = (int) 1e9;
  vector<vector<int>> edges(N);
  for (int i = 0; i < M; ++i) {
    edges[R[i][0]].push_back(R[i][1]);
    edges[R[i][1]].push_back(R[i][0]);
  }
  vector<int> next(2 * N, -1);
  for (int i = 0; i < N; ++i) {
    int x = edges[i][0];
    next[2 * i] = (i == edges[x][0] ? 2 * x + 1 : 2 * x);
    x = ((int) edges[i].size() == 1 ? edges[i][0] : edges[i][1]);
    next[2 * i + 1] = (i == edges[x][0] ? 2 * x + 1 : 2 * x);
  }
  vector<vector<int>> pred(2 * N);
  for (int i = 0; i < 2 * N; ++i) {
    pred[next[i]].push_back(i);
  }
  vector<bool> visited(2 * N, false), active(2 * N, false);
  vector<int> st, cyc_sz(2 * N, 0), cyc_dist(2 * N, INF), elem(2 * N, -1),
    cyc_root(2 * N, -1), cyc_id(2 * N, -1);
  int cycles = -1, start = 0;
  function<void(int)> dfs = [&](int node) {
    if (active[node]) {
      ++cycles;
      int sz = (int) st.size();
      int bgn = 0;
      while (st[bgn] != node) {
        ++bgn;
      }
      sz -= bgn;
      for (int i = bgn; i < (int) st.size(); ++i) {
        cyc_id[st[i]] = i - bgn;
        cyc_sz[st[i]] = sz;
        cyc_dist[st[i]] = 0;
        cyc_root[st[i]] = st[i];
        elem[st[i]] = cycles;
      }
    }
    if (visited[node]) {
      return;
    }
    visited[node] = true;
    active[node] = true;
    st.push_back(node);
    dfs(next[node]);
    active[node] = false;
    st.pop_back();
  };
  function<void(int, int)> tree_dfs = [&](int node, int root) -> void {
    for (auto x : pred[node]) {
      cyc_dist[x] = cyc_dist[node] + 1;
      cyc_root[x] = root;
      elem[x] = elem[root];
      tree_dfs(x, root);
    }
  };
  for (start = 0; start < 2 * N; start += 2) {
    if (!visited[start]) {
      dfs(start);
    }
  }
  for (int i = 0; i < 2 * N; ++i) {
    if (cyc_dist[i] == INF && cyc_dist[next[i]] == 0) {
      cyc_dist[i] = 1;
      cyc_root[i] = i;
      elem[i] = elem[next[i]];
      tree_dfs(i, i);
    }
  }
  for (int j = 0; j < Q; ++j) {
    int k = G[j], cnt = 0;
    for (int i = 0; i < N; ++i) {
      for (int p = 2 * P; p <= 2 * P + 1; ++p) {
        int node = 2 * i, dist = 0;
        if (elem[node] != elem[p]) continue;
        if (cyc_dist[node] != 0 && cyc_dist[p] <= cyc_dist[node]
          && cyc_root[p] == cyc_root[node]) {
          dist = cyc_dist[node] - cyc_dist[p];
          if (dist == k) {
            ++cnt;
          }
          continue;
        } else if (cyc_dist[p] > cyc_dist[node] ||
          (cyc_dist[p] != 0 && cyc_root[p] != cyc_root[node])) {
          continue;
        } else if (cyc_dist[node] != 0) {
          assert(cyc_dist[p] == 0);
          dist += cyc_dist[node];
          node = next[cyc_root[node]];
        }
        dist += (cyc_id[p] >= cyc_id[node] ? cyc_id[p] - cyc_id[node]
          : cyc_sz[node] - cyc_id[node] + cyc_id[p]);
        if (k >= dist && dist % cyc_sz[node] == k % cyc_sz[node]) {
          ++cnt;
        } 
      }
    }
    answer(cnt);
  }
}

Subtask #1
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 2 ms 596 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 10 ms 5076 KB Output is correct
12 Correct 21 ms 8148 KB Output is correct
13 Correct 39 ms 30404 KB Output is correct
14 Correct 87 ms 26212 KB Output is correct
15 Correct 87 ms 26572 KB Output is correct
16 Correct 64 ms 18892 KB Output is correct
17 Correct 54 ms 16084 KB Output is correct
18 Correct 22 ms 7764 KB Output is correct
19 Correct 93 ms 26188 KB Output is correct
20 Correct 85 ms 26628 KB Output is correct
21 Correct 65 ms 18764 KB Output is correct
22 Correct 58 ms 16076 KB Output is correct
23 Correct 88 ms 29260 KB Output is correct

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 10 ms 5076 KB Output is correct
12 Correct 21 ms 8148 KB Output is correct
13 Correct 39 ms 30404 KB Output is correct
14 Correct 87 ms 26212 KB Output is correct
15 Correct 87 ms 26572 KB Output is correct
16 Correct 64 ms 18892 KB Output is correct
17 Correct 54 ms 16084 KB Output is correct
18 Correct 22 ms 7764 KB Output is correct
19 Correct 93 ms 26188 KB Output is correct
20 Correct 85 ms 26628 KB Output is correct
21 Correct 65 ms 18764 KB Output is correct
22 Correct 58 ms 16076 KB Output is correct
23 Correct 88 ms 29260 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 146 ms 5076 KB Output is correct
26 Correct 218 ms 8172 KB Output is correct
27 Correct 3507 ms 30512 KB Output is correct
28 Correct 1343 ms 26316 KB Output is correct
29 Correct 3398 ms 26700 KB Output is correct
30 Correct 2094 ms 18920 KB Output is correct
31 Correct 1916 ms 16092 KB Output is correct
32 Incorrect 742 ms 7844 KB Output isn't correct
33 Halted 0 ms 0 KB -