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Submission #1009401

# Submission time Handle Problem Language Result Execution time Memory
1009401 2024-06-27T13:19:05 Z somefjord Drivers (BOI24_drivers) C++17
100 / 100
 249 ms 15172 KB 
#include <bits/stdc++.h>
using namespace std;

struct DSU {
  vector<int> parent;
  vector<int> rank;

  DSU(int n) : parent(n, -1), rank(n, 0) {}

  void unite(int u, int v) {
    u = find(u);
    v = find(v);
    if (u == v)
      return;
    if (rank[v] > rank[u])
      swap(u, v);
    rank[u]++;
    parent[v] = u;
  }

  int find(int u) {
    if (parent[u] == -1)
      return u;
    return parent[u] = find(parent[u]);
  }
};

int main() {
  int n, m, u;
  cin >> n >> m >> u;

  vector<array<int, 3>> roads(m);
  int x, y, t;
  for (auto &r : roads) {
    cin >> x >> y >> t;
    r = {t, x, y};
  }

  sort(roads.begin(), roads.end());

  vector<array<int, 4>> queries(u);
  int a, b, p;
  for (int i = 0; i < u; ++i) {
    cin >> a >> b >> p;
    queries[i] = {p, a, b, i};
  }

  sort(queries.begin(), queries.end());

  DSU dsu(n + 1);
  vector<bool> answer(u);

  int roadcursor = 0;
  for (auto [p, a, b, i] : queries) {
    for (; roadcursor < m; ++roadcursor) {
      auto [t, x, y] = roads[roadcursor];
      if (t > p)
        break;
      dsu.unite(x, y);
    }
    if (dsu.find(a) == dsu.find(b))
      answer[i] = true;
  }

  for (auto b : answer)
    cout << (b ? "TAIP" : "NE") << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 97 ms 6984 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 2 ms 448 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 448 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 500 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 3 ms 348 KB Output is correct
12 Correct 4 ms 616 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 4 ms 604 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 10 ms 912 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 12 ms 860 KB Output is correct
25 Correct 0 ms 348 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 97 ms 6984 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 3 ms 348 KB Output is correct
9 Correct 3 ms 348 KB Output is correct
10 Correct 4 ms 604 KB Output is correct
11 Correct 4 ms 496 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 97 ms 6984 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 2 ms 448 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 448 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 500 KB Output is correct
15 Correct 2 ms 348 KB Output is correct
16 Correct 3 ms 348 KB Output is correct
17 Correct 4 ms 616 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 4 ms 604 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 10 ms 912 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 12 ms 860 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 2 ms 348 KB Output is correct
33 Correct 3 ms 348 KB Output is correct
34 Correct 3 ms 348 KB Output is correct
35 Correct 4 ms 604 KB Output is correct
36 Correct 4 ms 496 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct

Subtask #5
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 97 ms 6984 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 2 ms 448 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 448 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 500 KB Output is correct
15 Correct 2 ms 348 KB Output is correct
16 Correct 3 ms 348 KB Output is correct
17 Correct 4 ms 616 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 4 ms 604 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 10 ms 912 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 12 ms 860 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 2 ms 348 KB Output is correct
33 Correct 3 ms 348 KB Output is correct
34 Correct 3 ms 348 KB Output is correct
35 Correct 4 ms 604 KB Output is correct
36 Correct 4 ms 496 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 249 ms 15172 KB Output is correct
42 Correct 15 ms 1368 KB Output is correct
43 Correct 16 ms 1372 KB Output is correct
44 Correct 26 ms 1712 KB Output is correct
45 Correct 21 ms 1532 KB Output is correct
46 Correct 13 ms 1116 KB Output is correct
47 Correct 167 ms 11592 KB Output is correct
48 Correct 19 ms 1624 KB Output is correct
49 Correct 206 ms 14800 KB Output is correct