oj.uz

Submission #826959

# Submission time Handle Problem Language Result Execution time Memory
826959 2023-08-16T07:31:35 Z erray Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 158 ms 24064 KB 
#include "supertrees.h"
#include <vector>
#include <bits/stdc++.h>

using namespace std;

#ifdef DEBUG
  #include "/home/eagle/ioi19/day2/debug.h"
#else 
  #define debug(...) void(37)
#endif

int construct(std::vector<std::vector<int>> P) {
	int N = int(P.size());
  vector<vector<int>> ans(N, vector<int>(N));
  auto Add = [&](int x, int y) {
    ans[x][y] = ans[y][x] = true;
  };
  bool bad = false;
  auto Group = [&](vector<int> s, function<bool(int)> connected) {
    int c = int(s.size());
    vector<int> used(c, -1);
    vector<vector<int>> gs;
    for (int i = 0; i < c; ++i) {
      if (used[i] != -1) {
        continue;
      }
      used[i] = i;
      gs.push_back({s[i]});
      for (int j = i + 1; j < c; ++j) {
        if (connected(P[s[i]][s[j]])) {
          if (used[j] != -1) {
            bad = true;
          }
          used[j] = i;
          gs.back().push_back(s[j]);
        }
      }
      for (auto x : gs.back()) {
        for (auto y : gs.back()) {
          bad |= !connected(P[x][y]);
        }
      }
    }
    for (int i = 0; i < c; ++i) {
      for (int j = 0; j < c; ++j) {
        bad |= connected(P[s[i]][s[j]]) != (used[i] == used[j]);
      }
    }
    return gs;
  };
  vector<int> foo(N);
  iota(foo.begin(), foo.end(), 0);
  auto gs = Group(foo, [&](int x) {
    return x != 0;
  });
  debug(gs);
  for (auto g : gs) {
    bool two = false, three = false;
    for (auto x : g) {
      for (auto y : g) {
        two |= P[x][y] == 2;
        three |= P[x][y] == 3; 
      }
    }
    auto ones = Group(g, [&](int x) {
      return x == 1;
    });
    if ((two && three) || (two && int(ones.size()) < 3) || (three && int(ones.size()) < 4)) {
      bad = true;
      break;
    }
    for (auto o : ones) {
      for (int i = 0; i < int(o.size()) - 1; ++i) {
        Add(o[i], o[i + 1]);
      }
    }
    for (int i = 0; i < int(ones.size()) - 1; ++i) {
      Add(ones[i][0], ones[i + 1][0]);
    }
    if (two || three) {
      Add(ones[0][0], ones[2][0]);
    }
    if (three) {
      Add(ones[1][0], ones[3][0]);
    }
  }
  if (bad) {
    return 0;
  }
  build(ans);
	return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1200 KB Output is correct
7 Correct 154 ms 22036 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1200 KB Output is correct
7 Correct 154 ms 22036 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1108 KB Output is correct
13 Correct 150 ms 22076 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 86 ms 12168 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 37 ms 5692 KB Output is correct
21 Correct 146 ms 21984 KB Output is correct
22 Correct 149 ms 22020 KB Output is correct
23 Correct 156 ms 22020 KB Output is correct
24 Correct 150 ms 22068 KB Output is correct
25 Correct 69 ms 12048 KB Output is correct
26 Correct 64 ms 14068 KB Output is correct
27 Correct 155 ms 23932 KB Output is correct
28 Correct 149 ms 24064 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 6 ms 1108 KB Output is correct
9 Correct 147 ms 22032 KB Output is correct
10 Incorrect 0 ms 212 KB Too few ways to get from 2 to 3, should be 2 found 1
11 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 51 ms 5656 KB Output is correct
5 Correct 147 ms 22000 KB Output is correct
6 Correct 149 ms 22064 KB Output is correct
7 Correct 158 ms 22016 KB Output is correct
8 Incorrect 0 ms 212 KB Too few ways to get from 2 to 3, should be 2 found 1
9 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1200 KB Output is correct
7 Correct 154 ms 22036 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1108 KB Output is correct
13 Correct 150 ms 22076 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 86 ms 12168 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 37 ms 5692 KB Output is correct
21 Correct 146 ms 21984 KB Output is correct
22 Correct 149 ms 22020 KB Output is correct
23 Correct 156 ms 22020 KB Output is correct
24 Correct 150 ms 22068 KB Output is correct
25 Correct 69 ms 12048 KB Output is correct
26 Correct 64 ms 14068 KB Output is correct
27 Correct 155 ms 23932 KB Output is correct
28 Correct 149 ms 24064 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 6 ms 1108 KB Output is correct
37 Correct 147 ms 22032 KB Output is correct
38 Incorrect 0 ms 212 KB Too few ways to get from 2 to 3, should be 2 found 1
39 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1200 KB Output is correct
7 Correct 154 ms 22036 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1108 KB Output is correct
13 Correct 150 ms 22076 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 86 ms 12168 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 37 ms 5692 KB Output is correct
21 Correct 146 ms 21984 KB Output is correct
22 Correct 149 ms 22020 KB Output is correct
23 Correct 156 ms 22020 KB Output is correct
24 Correct 150 ms 22068 KB Output is correct
25 Correct 69 ms 12048 KB Output is correct
26 Correct 64 ms 14068 KB Output is correct
27 Correct 155 ms 23932 KB Output is correct
28 Correct 149 ms 24064 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 6 ms 1108 KB Output is correct
37 Correct 147 ms 22032 KB Output is correct
38 Incorrect 0 ms 212 KB Too few ways to get from 2 to 3, should be 2 found 1
39 Halted 0 ms 0 KB -