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Submission #787589

# Submission time Handle Problem Language Result Execution time Memory
787589 2023-07-19T09:58:44 Z thimote75 Thousands Islands (IOI22_islands) C++17
35 / 100
 157 ms 38060 KB 
#include "islands.h"

#include <bits/stdc++.h>

using namespace std;

using idata = vector<int>;
using igrid = vector<idata>;
using graph = vector<vector<pair<pair<int, bool>, int>>>;
using bdata = vector<bool>;
using bgrid = vector<bdata>;

graph roads;

bgrid visited;
bgrid visiting;
bdata used;
idata path;

bool dfs (int node, int type, int last) {
  if (visited[node][type] && !visiting[node][type]) return false;
  if (visiting[node][type]) {
    if (type == 1) return true;
    type ++;
    if (visited[node][type]) return false;
  }

  visiting[node][type] = true;
  visited [node][type] = true;

  for (const auto &road : roads[node]) {
    int id   = road.first.first;
    int next = road.second;
    if (used[id] != road.first.second || last == id) continue ;

    used[id] = !road.first.second;
    if (dfs(next, type, id))
      return true;
    used[id] = road.first.second;
  }

  visiting[node][type] = false;
  return false;
}

std::variant<bool, idata> find_journey(
    int N, int M, idata U, idata V) {
  roads.resize(N);
  visited.resize(N, bdata(2)); visiting.resize(N, bdata(2));
  used.resize(M);
  bool st3 = M % 2 == 0;
  for (int i = 0; i < M; i ++) {
    roads[U[i]].push_back({ {i, false}, V[i] });
    roads[V[i]].push_back({ {i, true }, U[i] });
  }
  
  if (!dfs(0, 0, -1)) return false;

  return true;
}

Compilation message

islands.cpp: In function 'std::variant<bool, std::vector<int, std::allocator<int> > > find_journey(int, int, idata, idata)':
islands.cpp:51:8: warning: unused variable 'st3' [-Wunused-variable]
   51 |   bool st3 = M % 2 == 0;
      |        ^~~

Subtask #1
1.75 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Partially correct 0 ms 212 KB Output is partially correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Partially correct 0 ms 212 KB Output is partially correct
7 Partially correct 33 ms 8220 KB Output is partially correct

Subtask #2
1.75 / 5.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 212 KB Output is partially correct
2 Correct 1 ms 212 KB Output is correct
3 Partially correct 1 ms 212 KB Output is partially correct
4 Partially correct 0 ms 212 KB Output is partially correct
5 Partially correct 0 ms 212 KB Output is partially correct
6 Partially correct 27 ms 8212 KB Output is partially correct

Subtask #3
7.35 / 21.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 596 KB Output is partially correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Partially correct 1 ms 212 KB Output is partially correct
5 Correct 1 ms 596 KB Output is correct
6 Partially correct 1 ms 212 KB Output is partially correct
7 Correct 1 ms 468 KB Output is correct
8 Partially correct 1 ms 212 KB Output is partially correct
9 Partially correct 1 ms 212 KB Output is partially correct
10 Partially correct 1 ms 596 KB Output is partially correct
11 Partially correct 1 ms 212 KB Output is partially correct
12 Partially correct 1 ms 596 KB Output is partially correct
13 Correct 1 ms 296 KB Output is correct
14 Correct 1 ms 224 KB Output is correct
15 Partially correct 1 ms 296 KB Output is partially correct
16 Correct 1 ms 340 KB Output is correct
17 Partially correct 18 ms 6060 KB Output is partially correct
18 Partially correct 14 ms 5552 KB Output is partially correct
19 Correct 0 ms 212 KB Output is correct
20 Partially correct 1 ms 212 KB Output is partially correct
21 Partially correct 0 ms 212 KB Output is partially correct
22 Partially correct 1 ms 296 KB Output is partially correct
23 Partially correct 27 ms 9340 KB Output is partially correct

Subtask #4
8.4 / 24.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 340 KB Output is partially correct
2 Partially correct 1 ms 468 KB Output is partially correct
3 Partially correct 35 ms 9132 KB Output is partially correct
4 Partially correct 31 ms 9988 KB Output is partially correct
5 Partially correct 1 ms 596 KB Output is partially correct
6 Partially correct 1 ms 596 KB Output is partially correct
7 Partially correct 0 ms 212 KB Output is partially correct
8 Partially correct 0 ms 212 KB Output is partially correct
9 Partially correct 1 ms 212 KB Output is partially correct
10 Partially correct 1 ms 596 KB Output is partially correct
11 Correct 2 ms 724 KB Output is correct
12 Partially correct 1 ms 712 KB Output is partially correct
13 Partially correct 1 ms 724 KB Output is partially correct
14 Partially correct 1 ms 596 KB Output is partially correct
15 Partially correct 2 ms 724 KB Output is partially correct
16 Partially correct 1 ms 468 KB Output is partially correct
17 Correct 1 ms 212 KB Output is correct
18 Partially correct 1 ms 596 KB Output is partially correct
19 Partially correct 1 ms 468 KB Output is partially correct
20 Correct 50 ms 10500 KB Output is correct
21 Partially correct 47 ms 10204 KB Output is partially correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Partially correct 1 ms 340 KB Output is partially correct
26 Partially correct 1 ms 596 KB Output is partially correct
27 Partially correct 33 ms 9692 KB Output is partially correct
28 Partially correct 46 ms 9696 KB Output is partially correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 37 ms 10260 KB Output is correct
31 Partially correct 0 ms 212 KB Output is partially correct
32 Partially correct 34 ms 10864 KB Output is partially correct
33 Partially correct 39 ms 8892 KB Output is partially correct
34 Partially correct 18 ms 5588 KB Output is partially correct
35 Partially correct 1 ms 468 KB Output is partially correct
36 Partially correct 30 ms 9440 KB Output is partially correct
37 Partially correct 36 ms 10316 KB Output is partially correct
38 Correct 1 ms 468 KB Output is correct
39 Correct 39 ms 9628 KB Output is correct
40 Partially correct 1 ms 596 KB Output is partially correct
41 Correct 38 ms 10444 KB Output is correct
42 Partially correct 34 ms 9916 KB Output is partially correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 1 ms 696 KB Output is correct
45 Partially correct 1 ms 596 KB Output is partially correct
46 Partially correct 15 ms 5192 KB Output is partially correct

Subtask #5
15.75 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Partially correct 0 ms 212 KB Output is partially correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Partially correct 0 ms 212 KB Output is partially correct
7 Partially correct 33 ms 8220 KB Output is partially correct
8 Partially correct 1 ms 212 KB Output is partially correct
9 Correct 1 ms 212 KB Output is correct
10 Partially correct 1 ms 212 KB Output is partially correct
11 Partially correct 0 ms 212 KB Output is partially correct
12 Partially correct 0 ms 212 KB Output is partially correct
13 Partially correct 27 ms 8212 KB Output is partially correct
14 Partially correct 1 ms 596 KB Output is partially correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Partially correct 1 ms 212 KB Output is partially correct
18 Correct 1 ms 596 KB Output is correct
19 Partially correct 1 ms 212 KB Output is partially correct
20 Correct 1 ms 468 KB Output is correct
21 Partially correct 1 ms 212 KB Output is partially correct
22 Partially correct 1 ms 212 KB Output is partially correct
23 Partially correct 1 ms 596 KB Output is partially correct
24 Partially correct 1 ms 212 KB Output is partially correct
25 Partially correct 1 ms 596 KB Output is partially correct
26 Correct 1 ms 296 KB Output is correct
27 Correct 1 ms 224 KB Output is correct
28 Partially correct 1 ms 296 KB Output is partially correct
29 Correct 1 ms 340 KB Output is correct
30 Partially correct 18 ms 6060 KB Output is partially correct
31 Partially correct 14 ms 5552 KB Output is partially correct
32 Correct 0 ms 212 KB Output is correct
33 Partially correct 1 ms 212 KB Output is partially correct
34 Partially correct 0 ms 212 KB Output is partially correct
35 Partially correct 1 ms 296 KB Output is partially correct
36 Partially correct 27 ms 9340 KB Output is partially correct
37 Partially correct 0 ms 212 KB Output is partially correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 16 ms 5156 KB Output is correct
42 Correct 2 ms 764 KB Output is correct
43 Correct 58 ms 19260 KB Output is correct
44 Correct 52 ms 17524 KB Output is correct
45 Partially correct 51 ms 19400 KB Output is partially correct
46 Partially correct 1 ms 212 KB Output is partially correct
47 Partially correct 0 ms 212 KB Output is partially correct
48 Partially correct 0 ms 212 KB Output is partially correct
49 Partially correct 1 ms 596 KB Output is partially correct
50 Partially correct 73 ms 36660 KB Output is partially correct
51 Correct 130 ms 35428 KB Output is correct
52 Correct 138 ms 36592 KB Output is correct
53 Partially correct 152 ms 38060 KB Output is partially correct
54 Correct 106 ms 34944 KB Output is correct
55 Correct 157 ms 36372 KB Output is correct
56 Partially correct 134 ms 35580 KB Output is partially correct
57 Partially correct 63 ms 22928 KB Output is partially correct
58 Partially correct 67 ms 33340 KB Output is partially correct
59 Correct 98 ms 30248 KB Output is correct
60 Correct 74 ms 30408 KB Output is correct
61 Correct 68 ms 30272 KB Output is correct
62 Correct 14 ms 9896 KB Output is correct
63 Correct 65 ms 29424 KB Output is correct
64 Partially correct 21 ms 7084 KB Output is partially correct
65 Partially correct 1 ms 212 KB Output is partially correct
66 Partially correct 1 ms 340 KB Output is partially correct
67 Partially correct 70 ms 30344 KB Output is partially correct
68 Correct 37 ms 11720 KB Output is correct
69 Correct 57 ms 26184 KB Output is correct
70 Partially correct 2 ms 724 KB Output is partially correct
71 Correct 59 ms 18508 KB Output is correct
72 Partially correct 1 ms 212 KB Output is partially correct
73 Correct 94 ms 25276 KB Output is correct
74 Partially correct 73 ms 34764 KB Output is partially correct
75 Partially correct 4 ms 1236 KB Output is partially correct
76 Partially correct 40 ms 18436 KB Output is partially correct
77 Correct 66 ms 32168 KB Output is correct
78 Correct 72 ms 30512 KB Output is correct
79 Partially correct 1 ms 212 KB Output is partially correct
80 Partially correct 113 ms 36764 KB Output is partially correct
81 Partially correct 1 ms 596 KB Output is partially correct
82 Correct 43 ms 9368 KB Output is correct
83 Partially correct 1 ms 468 KB Output is partially correct
84 Partially correct 0 ms 212 KB Output is partially correct
85 Partially correct 27 ms 16260 KB Output is partially correct
86 Partially correct 1 ms 724 KB Output is partially correct
87 Correct 11 ms 13396 KB Output is correct
88 Partially correct 2 ms 888 KB Output is partially correct
89 Correct 75 ms 30372 KB Output is correct
90 Correct 85 ms 30336 KB Output is correct
91 Partially correct 113 ms 36900 KB Output is partially correct
92 Partially correct 1 ms 212 KB Output is partially correct