oj.uz

Submission #963848

# Submission time Handle Problem Language Result Execution time Memory
963848 2024-04-15T19:46:42 Z nguyentunglam Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 162 ms 22192 KB 
#include "supertrees.h"
#ifdef ngu
#include "grader.cpp"
#endif // ngu
#include <vector>
#include<bits/stdc++.h>
using namespace std;


int construct(std::vector<std::vector<int>> p) {
	int n = p.size();

  auto valid = [&] (vector<int> a, vector<int> b, int c) {
    for(int &j : a) for(int &k : b) if (p[j][k] != c) return false;
    return true;
  };

	vector<int> vis(n), arr;

  auto dfs = [&] (auto self, int u) -> void {
    vis[u] = 1;
    arr.push_back(u);
    for(int v = 0; v < n; v++) if (!vis[v] && p[u][v] == 1) self(self, v);
  };

	std::vector<std::vector<int>> answer(n, vector<int> (n));

  auto add = [&] (int u, int v) {
    answer[u][v] = answer[v][u] = 1;
  };

  vector<vector<int> > connected;

  for(int i = 0; i < n; i++) if (!vis[i]) {
    arr.clear();
    dfs(dfs, i);
    if (!valid(arr, arr, 1)) return 0;
    connected.push_back(arr);
    for(int j = 1; j < arr.size(); j++) {
      answer[arr[j]][arr[j - 1]] = answer[arr[j - 1]][arr[j]] = 1;
    }
  }

  for(int i = 0; i < n; i++) vis[i] = 0;

  for(int i = 0; i < connected.size(); i++) if (!vis[i]) {
    vector<int> zip, g;
    g.push_back(i);
    for(auto &k : connected[i]) zip.push_back(k);
    for(int j = 0; j < connected.size(); j++) if (j != i && p[connected[i][0]][connected[j][0]] == 2) {
      if (vis[j]) return 0;
      if (!valid(zip, connected[j], 2)) return 0;
      for(auto &k : connected[j]) zip.push_back(k);
      g.push_back(j);
    }
    if (g.size() == 1) continue;
    if (g.size() < 3) return 0;
    for(int i = 1; i < g.size(); i++) {
      add(connected[g[i]][0], connected[g[i - 1]][0]);
    }
    add(connected[g[0]][0], connected[g.back()][0]);
  }

  build(answer);

	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(int j = 1; j < arr.size(); j++) {
      |                    ~~^~~~~~~~~~~~
supertrees.cpp:46:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |   for(int i = 0; i < connected.size(); i++) if (!vis[i]) {
      |                  ~~^~~~~~~~~~~~~~~~~~
supertrees.cpp:50:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |     for(int j = 0; j < connected.size(); j++) if (j != i && p[connected[i][0]][connected[j][0]] == 2) {
      |                    ~~^~~~~~~~~~~~~~~~~~
supertrees.cpp:58:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int i = 1; i < g.size(); i++) {
      |                    ~~^~~~~~~~~~

Subtask #1
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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 148 ms 22036 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 148 ms 22036 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 9 ms 1372 KB Output is correct
13 Correct 156 ms 22024 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 69 ms 12312 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 47 ms 5836 KB Output is correct
21 Correct 153 ms 22176 KB Output is correct
22 Correct 154 ms 21996 KB Output is correct
23 Correct 152 ms 22036 KB Output is correct
24 Correct 154 ms 22096 KB Output is correct
25 Correct 68 ms 12036 KB Output is correct
26 Correct 63 ms 12040 KB Output is correct
27 Correct 158 ms 21980 KB Output is correct
28 Correct 161 ms 22192 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 7 ms 1108 KB Output is correct
9 Correct 154 ms 22080 KB Output is correct
10 Incorrect 0 ms 344 KB Too many ways to get from 0 to 3, should be 2 found no less than 3
11 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 40 ms 5868 KB Output is correct
5 Correct 153 ms 22100 KB Output is correct
6 Correct 153 ms 22044 KB Output is correct
7 Correct 162 ms 22100 KB Output is correct
8 Incorrect 0 ms 344 KB Too many ways to get from 0 to 2, should be 2 found no less than 3
9 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 148 ms 22036 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 9 ms 1372 KB Output is correct
13 Correct 156 ms 22024 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 69 ms 12312 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 47 ms 5836 KB Output is correct
21 Correct 153 ms 22176 KB Output is correct
22 Correct 154 ms 21996 KB Output is correct
23 Correct 152 ms 22036 KB Output is correct
24 Correct 154 ms 22096 KB Output is correct
25 Correct 68 ms 12036 KB Output is correct
26 Correct 63 ms 12040 KB Output is correct
27 Correct 158 ms 21980 KB Output is correct
28 Correct 161 ms 22192 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1108 KB Output is correct
37 Correct 154 ms 22080 KB Output is correct
38 Incorrect 0 ms 344 KB Too many ways to get from 0 to 3, should be 2 found no less than 3
39 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# 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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 148 ms 22036 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 9 ms 1372 KB Output is correct
13 Correct 156 ms 22024 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 69 ms 12312 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 47 ms 5836 KB Output is correct
21 Correct 153 ms 22176 KB Output is correct
22 Correct 154 ms 21996 KB Output is correct
23 Correct 152 ms 22036 KB Output is correct
24 Correct 154 ms 22096 KB Output is correct
25 Correct 68 ms 12036 KB Output is correct
26 Correct 63 ms 12040 KB Output is correct
27 Correct 158 ms 21980 KB Output is correct
28 Correct 161 ms 22192 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1108 KB Output is correct
37 Correct 154 ms 22080 KB Output is correct
38 Incorrect 0 ms 344 KB Too many ways to get from 0 to 3, should be 2 found no less than 3
39 Halted 0 ms 0 KB -