oj.uz

Submission #305527

# Submission time Handle Problem Language Result Execution time Memory
305527 2020-09-23T12:56:57 Z rama_pang Stations (IOI20_stations) C++14
100 / 100
 1065 ms 1448 KB 
#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  vector<int> labels(n);
  vector<vector<int>> adj(n);
  for (int i = 0; i + 1 < n; i++) {
    adj[u[i]].emplace_back(v[i]);
    adj[v[i]].emplace_back(u[i]);
  }
  vector<int> st(n), et(n);
  int timer = 0;
  const function<void(int, int, int)> Dfs = [&](int u, int p, int odd) {
    st[u] = timer++;
    for (auto v : adj[u]) if (v != p) {
      Dfs(v, u, odd ^ 1);
    }
    et[u] = timer++;
    if (odd) {
      labels[u] = st[u];
    } else {
      labels[u] = et[u];
    }
  };
  Dfs(0, -1, 0);
  vector<int> coords = labels;
  sort(begin(coords), end(coords));
  for (int i = 0; i < n; i++) {
    labels[i] = lower_bound(begin(coords), end(coords), labels[i]) - begin(coords);
  }
  return labels;
}

int find_next_station(int s, int t, vector<int> c) {
  if (s < *min_element(begin(c), end(c))) {
    int par = c.back();
    for (auto u : c) {
      if (u != par && s <= t && t <= u) {
        return u;
      }
    }
    return par;
  } else {
    reverse(begin(c), end(c));
    int par = c.back();
    for (auto u : c) {
      if (u != par && u <= t && t <= s) {
        return u;
      }
    }
    return par;
  }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 582 ms 1008 KB Output is correct
2 Correct 496 ms 1280 KB Output is correct
3 Correct 969 ms 640 KB Output is correct
4 Correct 764 ms 648 KB Output is correct
5 Correct 590 ms 640 KB Output is correct
6 Correct 544 ms 1024 KB Output is correct
7 Correct 537 ms 1024 KB Output is correct
8 Correct 2 ms 660 KB Output is correct
9 Correct 4 ms 640 KB Output is correct
10 Correct 2 ms 656 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 469 ms 820 KB Output is correct
2 Correct 567 ms 808 KB Output is correct
3 Correct 872 ms 772 KB Output is correct
4 Correct 690 ms 640 KB Output is correct
5 Correct 618 ms 656 KB Output is correct
6 Correct 511 ms 948 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 589 ms 1024 KB Output is correct
2 Correct 503 ms 1008 KB Output is correct
3 Correct 1065 ms 640 KB Output is correct
4 Correct 696 ms 640 KB Output is correct
5 Correct 808 ms 784 KB Output is correct
6 Correct 559 ms 1024 KB Output is correct
7 Correct 487 ms 1024 KB Output is correct
8 Correct 3 ms 648 KB Output is correct
9 Correct 4 ms 640 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 692 ms 640 KB Output is correct
12 Correct 588 ms 1084 KB Output is correct
13 Correct 572 ms 1092 KB Output is correct
14 Correct 508 ms 772 KB Output is correct
15 Correct 61 ms 1024 KB Output is correct
16 Correct 69 ms 856 KB Output is correct
17 Correct 116 ms 804 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 909 ms 776 KB Output is correct
2 Correct 667 ms 644 KB Output is correct
3 Correct 594 ms 784 KB Output is correct
4 Correct 3 ms 640 KB Output is correct
5 Correct 5 ms 640 KB Output is correct
6 Correct 2 ms 640 KB Output is correct
7 Correct 641 ms 784 KB Output is correct
8 Correct 879 ms 648 KB Output is correct
9 Correct 711 ms 640 KB Output is correct
10 Correct 602 ms 672 KB Output is correct
11 Correct 5 ms 640 KB Output is correct
12 Correct 6 ms 776 KB Output is correct
13 Correct 4 ms 640 KB Output is correct
14 Correct 3 ms 640 KB Output is correct
15 Correct 2 ms 644 KB Output is correct
16 Correct 506 ms 640 KB Output is correct
17 Correct 499 ms 644 KB Output is correct
18 Correct 494 ms 756 KB Output is correct
19 Correct 487 ms 640 KB Output is correct
20 Correct 529 ms 644 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 550 ms 1024 KB Output is correct
2 Correct 462 ms 1008 KB Output is correct
3 Correct 908 ms 776 KB Output is correct
4 Correct 677 ms 640 KB Output is correct
5 Correct 586 ms 640 KB Output is correct
6 Correct 445 ms 1448 KB Output is correct
7 Correct 476 ms 1024 KB Output is correct
8 Correct 2 ms 644 KB Output is correct
9 Correct 5 ms 640 KB Output is correct
10 Correct 2 ms 644 KB Output is correct
11 Correct 455 ms 820 KB Output is correct
12 Correct 531 ms 804 KB Output is correct
13 Correct 867 ms 640 KB Output is correct
14 Correct 651 ms 640 KB Output is correct
15 Correct 635 ms 640 KB Output is correct
16 Correct 455 ms 816 KB Output is correct
17 Correct 589 ms 640 KB Output is correct
18 Correct 464 ms 1116 KB Output is correct
19 Correct 499 ms 1024 KB Output is correct
20 Correct 478 ms 816 KB Output is correct
21 Correct 57 ms 900 KB Output is correct
22 Correct 74 ms 860 KB Output is correct
23 Correct 111 ms 780 KB Output is correct
24 Correct 5 ms 892 KB Output is correct
25 Correct 6 ms 644 KB Output is correct
26 Correct 5 ms 640 KB Output is correct
27 Correct 4 ms 640 KB Output is correct
28 Correct 2 ms 784 KB Output is correct
29 Correct 518 ms 1028 KB Output is correct
30 Correct 508 ms 772 KB Output is correct
31 Correct 498 ms 648 KB Output is correct
32 Correct 549 ms 644 KB Output is correct
33 Correct 508 ms 640 KB Output is correct
34 Correct 326 ms 1024 KB Output is correct
35 Correct 437 ms 1024 KB Output is correct
36 Correct 479 ms 1104 KB Output is correct
37 Correct 499 ms 916 KB Output is correct
38 Correct 473 ms 796 KB Output is correct
39 Correct 471 ms 896 KB Output is correct
40 Correct 457 ms 772 KB Output is correct
41 Correct 469 ms 780 KB Output is correct
42 Correct 65 ms 960 KB Output is correct
43 Correct 106 ms 768 KB Output is correct
44 Correct 149 ms 768 KB Output is correct
45 Correct 153 ms 804 KB Output is correct
46 Correct 329 ms 768 KB Output is correct
47 Correct 311 ms 1024 KB Output is correct
48 Correct 64 ms 768 KB Output is correct
49 Correct 65 ms 804 KB Output is correct