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Submission #503140

# Submission time Handle Problem Language Result Execution time Memory
503140 2022-01-07T11:11:43 Z BERNARB01 Dynamic Diameter (CEOI19_diameter) C++17
24 / 100
 5000 ms 11348 KB 
#include <bits/stdc++.h>

using namespace std;

struct edge {
  int from, to;
  long long w;
};

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, q;
  long long md;
  cin >> n >> q >> md;
  vector<edge> ed(n + n);
  vector<vector<int>> g(n);
  for (int i = 0; i < n - 1; i++) {
    int u, v;
    long long w;
    cin >> u >> v >> w;
    --u; --v;
    ed[i] = {u, v, w};
    ed[i + n - 1] = {v, u, w};
    g[u].emplace_back(i);
    g[v].emplace_back(i + n - 1);
  }
  pair<long long, int> best_dia;
  function<void(int, int, long long)> calc_dia = [&](int v, int pr, long long dist) {
    best_dia = max(best_dia, make_pair(dist, v));
    for (int e : g[v]) {
      if (ed[e].to == pr) {
        continue;
      }
      calc_dia(ed[e].to, v, dist + ed[e].w);
    }
  };
  long long last = 0;
  for (int t = 0; t < q; t++) {
    int dd;
    long long ee;
    cin >> dd >> ee;
    int d = ((long long) dd + last) % (n - 1);
    long long w = (ee + last) % md;
    ed[d].w = w;
    ed[d + n - 1].w = w;
    best_dia = make_pair(0, 0);
    calc_dia(0, -1, 0);
    calc_dia(best_dia.second, -1, 0);
    last = best_dia.first;
    cout << last << '\n';
  }
  return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 204 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 167 ms 440 KB Output is correct
20 Correct 202 ms 468 KB Output is correct
21 Correct 196 ms 472 KB Output is correct
22 Correct 268 ms 548 KB Output is correct
23 Correct 1427 ms 884 KB Output is correct
24 Correct 1627 ms 900 KB Output is correct
25 Correct 1937 ms 996 KB Output is correct
26 Correct 2243 ms 1540 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 312 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 3 ms 332 KB Output is correct
4 Correct 18 ms 464 KB Output is correct
5 Correct 67 ms 1348 KB Output is correct
6 Correct 0 ms 312 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 3 ms 332 KB Output is correct
9 Correct 22 ms 324 KB Output is correct
10 Correct 207 ms 588 KB Output is correct
11 Correct 1048 ms 1756 KB Output is correct
12 Correct 4 ms 708 KB Output is correct
13 Correct 24 ms 820 KB Output is correct
14 Correct 195 ms 844 KB Output is correct
15 Correct 2136 ms 1020 KB Output is correct
16 Execution timed out 5102 ms 1520 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 404 KB Output is correct
2 Correct 241 ms 496 KB Output is correct
3 Correct 1235 ms 1296 KB Output is correct
4 Correct 2391 ms 1812 KB Output is correct
5 Correct 235 ms 1208 KB Output is correct
6 Correct 2408 ms 1552 KB Output is correct
7 Execution timed out 5083 ms 1904 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5039 ms 11348 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 167 ms 440 KB Output is correct
20 Correct 202 ms 468 KB Output is correct
21 Correct 196 ms 472 KB Output is correct
22 Correct 268 ms 548 KB Output is correct
23 Correct 1427 ms 884 KB Output is correct
24 Correct 1627 ms 900 KB Output is correct
25 Correct 1937 ms 996 KB Output is correct
26 Correct 2243 ms 1540 KB Output is correct
27 Correct 0 ms 312 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 3 ms 332 KB Output is correct
30 Correct 18 ms 464 KB Output is correct
31 Correct 67 ms 1348 KB Output is correct
32 Correct 0 ms 312 KB Output is correct
33 Correct 1 ms 304 KB Output is correct
34 Correct 3 ms 332 KB Output is correct
35 Correct 22 ms 324 KB Output is correct
36 Correct 207 ms 588 KB Output is correct
37 Correct 1048 ms 1756 KB Output is correct
38 Correct 4 ms 708 KB Output is correct
39 Correct 24 ms 820 KB Output is correct
40 Correct 195 ms 844 KB Output is correct
41 Correct 2136 ms 1020 KB Output is correct
42 Execution timed out 5102 ms 1520 KB Time limit exceeded
43 Halted 0 ms 0 KB -