oj.uz

Submission #329784

# Submission time Handle Problem Language Result Execution time Memory
329784 2020-11-22T14:18:23 Z chenwz Stations (IOI20_stations) C++14
100 / 100
 1172 ms 1240 KB 
#include "stations.h"
#include <vector>
using namespace std;
typedef vector<int> IVec;

void rec(int u, int fa, bool dfs_in, int &clock, const vector<IVec>& G, IVec& L) {
  if (dfs_in) L[u] = clock++;
  for (int i : G[u])
    if (i != fa) rec(i, u, !dfs_in, clock, G, L);
  if (!dfs_in) L[u] = clock++;
}

IVec label(int n, int k, IVec u, IVec v) {
  IVec L(n);
  vector<IVec> G(n, IVec());
  for (int i = 0; i < u.size(); i++)
    G[u[i]].push_back(v[i]), G[v[i]].push_back(u[i]);
  int clock = 0;
  rec(0, -1, true, clock, G, L);
  return L;
}

int find_next_station(int s, int t, IVec c) {
  if (c[0] > s) { // Case 1: s is in InClock. All the neighbors' label > s.
    if (t < s || t > c.back()) return c.back(); // t not in this subtree, go to parent.
    int v = 0; // t is in this subtree, Pick the smallest ch >= t
    return *lower_bound(c.begin(), c.end(), t);
  }
  if (t < c[0]) // Case 2: node s is in the post_order level.
    return c[0]; // t not in subtree
  if (t > s) return c[0]; // t not in this subtree, go to the root.
  int v = c.size() - 1;
  while (c[v] > t) v--;
  return c[v];
}

Compilation message

stations.cpp: In function 'IVec label(int, int, IVec, IVec)':
stations.cpp:16:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |   for (int i = 0; i < u.size(); i++)
      |                   ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, IVec)':
stations.cpp:26:9: warning: unused variable 'v' [-Wunused-variable]
   26 |     int v = 0; // t is in this subtree, Pick the smallest ch >= t
      |         ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 566 ms 876 KB Output is correct
2 Correct 608 ms 884 KB Output is correct
3 Correct 988 ms 756 KB Output is correct
4 Correct 819 ms 756 KB Output is correct
5 Correct 699 ms 756 KB Output is correct
6 Correct 565 ms 988 KB Output is correct
7 Correct 607 ms 1008 KB Output is correct
8 Correct 2 ms 880 KB Output is correct
9 Correct 5 ms 1008 KB Output is correct
10 Correct 1 ms 756 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 606 ms 736 KB Output is correct
2 Correct 582 ms 864 KB Output is correct
3 Correct 1047 ms 772 KB Output is correct
4 Correct 749 ms 736 KB Output is correct
5 Correct 621 ms 756 KB Output is correct
6 Correct 518 ms 736 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 591 ms 884 KB Output is correct
2 Correct 544 ms 920 KB Output is correct
3 Correct 1055 ms 756 KB Output is correct
4 Correct 814 ms 880 KB Output is correct
5 Correct 648 ms 756 KB Output is correct
6 Correct 608 ms 896 KB Output is correct
7 Correct 548 ms 884 KB Output is correct
8 Correct 3 ms 756 KB Output is correct
9 Correct 4 ms 756 KB Output is correct
10 Correct 1 ms 756 KB Output is correct
11 Correct 593 ms 1008 KB Output is correct
12 Correct 504 ms 1012 KB Output is correct
13 Correct 545 ms 864 KB Output is correct
14 Correct 522 ms 748 KB Output is correct
15 Correct 66 ms 884 KB Output is correct
16 Correct 71 ms 736 KB Output is correct
17 Correct 116 ms 884 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 931 ms 800 KB Output is correct
2 Correct 727 ms 1008 KB Output is correct
3 Correct 660 ms 756 KB Output is correct
4 Correct 2 ms 756 KB Output is correct
5 Correct 5 ms 736 KB Output is correct
6 Correct 2 ms 736 KB Output is correct
7 Correct 619 ms 736 KB Output is correct
8 Correct 1043 ms 752 KB Output is correct
9 Correct 741 ms 756 KB Output is correct
10 Correct 574 ms 752 KB Output is correct
11 Correct 7 ms 736 KB Output is correct
12 Correct 6 ms 736 KB Output is correct
13 Correct 5 ms 756 KB Output is correct
14 Correct 3 ms 748 KB Output is correct
15 Correct 2 ms 888 KB Output is correct
16 Correct 679 ms 880 KB Output is correct
17 Correct 645 ms 920 KB Output is correct
18 Correct 656 ms 756 KB Output is correct
19 Correct 645 ms 880 KB Output is correct
20 Correct 574 ms 736 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 654 ms 864 KB Output is correct
2 Correct 473 ms 884 KB Output is correct
3 Correct 1033 ms 756 KB Output is correct
4 Correct 714 ms 748 KB Output is correct
5 Correct 671 ms 736 KB Output is correct
6 Correct 589 ms 884 KB Output is correct
7 Correct 462 ms 756 KB Output is correct
8 Correct 2 ms 796 KB Output is correct
9 Correct 5 ms 756 KB Output is correct
10 Correct 1 ms 880 KB Output is correct
11 Correct 494 ms 756 KB Output is correct
12 Correct 669 ms 960 KB Output is correct
13 Correct 1172 ms 796 KB Output is correct
14 Correct 675 ms 756 KB Output is correct
15 Correct 689 ms 756 KB Output is correct
16 Correct 493 ms 1184 KB Output is correct
17 Correct 622 ms 756 KB Output is correct
18 Correct 668 ms 880 KB Output is correct
19 Correct 487 ms 1100 KB Output is correct
20 Correct 534 ms 756 KB Output is correct
21 Correct 69 ms 736 KB Output is correct
22 Correct 74 ms 788 KB Output is correct
23 Correct 133 ms 756 KB Output is correct
24 Correct 6 ms 736 KB Output is correct
25 Correct 6 ms 756 KB Output is correct
26 Correct 5 ms 736 KB Output is correct
27 Correct 5 ms 736 KB Output is correct
28 Correct 2 ms 736 KB Output is correct
29 Correct 512 ms 756 KB Output is correct
30 Correct 528 ms 888 KB Output is correct
31 Correct 504 ms 880 KB Output is correct
32 Correct 572 ms 1008 KB Output is correct
33 Correct 482 ms 880 KB Output is correct
34 Correct 336 ms 992 KB Output is correct
35 Correct 473 ms 884 KB Output is correct
36 Correct 483 ms 1240 KB Output is correct
37 Correct 458 ms 888 KB Output is correct
38 Correct 474 ms 736 KB Output is correct
39 Correct 438 ms 840 KB Output is correct
40 Correct 451 ms 864 KB Output is correct
41 Correct 516 ms 884 KB Output is correct
42 Correct 82 ms 828 KB Output is correct
43 Correct 138 ms 756 KB Output is correct
44 Correct 127 ms 756 KB Output is correct
45 Correct 176 ms 736 KB Output is correct
46 Correct 318 ms 800 KB Output is correct
47 Correct 349 ms 764 KB Output is correct
48 Correct 77 ms 756 KB Output is correct
49 Correct 73 ms 736 KB Output is correct