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Submission #1035668

# Submission time Handle Problem Language Result Execution time Memory
1035668 2024-07-26T13:13:58 Z vjudge1 Political Development (BOI17_politicaldevelopment) C++17
39 / 100
 350 ms 337908 KB 
#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math,inline")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,lzcnt,mmx,abm,avx,avx2,fma")
#include <bits/stdc++.h>
using namespace std;

#define all(x) x.begin(), x.end()

const int N = 5e4;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, k, c, ans;
vector<int> vt, adj[N];
set<int> st[N];
bitset<N> bt[N], r, toTake;

void clean(int x) {
  for (int i = 0; i < n; i++) {
    if (adj[i].size()+1 < x) r[i] = 1;
  }
}

void dfs(int x) {
  c++;
  if (c > ans) {
    ans = c;
    clean(c+1);
  }

  vector<int> opt;
  for (int y = toTake._Find_first(); y < n; y = toTake._Find_next(y)) { 
    if (r[y]) continue;

    opt.push_back(y);
  }

  int sz = opt.size();
  if (!sz) return;

  int y = opt[rng() % sz];

  toTake &= bt[y];
  dfs(y);
}

signed main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  cin >> n >> k;
  for (int i = 0; i < n; i++) {
    int x; cin >> x;

    for (int j = 0; j < x; j++) {
      int y; cin >> y;
      st[i].insert(y);

      if (st[y].find(i) != st[y].end()) {
        bt[i][y] = 1;
        adj[i].push_back(y);

        bt[y][i] = 1;
        adj[y].push_back(i);
      }
    }
  }

  ans = 1;
  for (int i = 0; i < n; i++) {
    c = 0;
    toTake = bt[i];
    dfs(i);
  }

  cout << ans << "\n";
}

Compilation message

politicaldevelopment.cpp: In function 'void clean(int)':
politicaldevelopment.cpp:19:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   19 |     if (adj[i].size()+1 < x) r[i] = 1;
      |         ~~~~~~~~~~~~~~~~^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3932 KB Output is correct
2 Correct 2 ms 3992 KB Output is correct
3 Correct 23 ms 25320 KB Output is correct
4 Correct 19 ms 24664 KB Output is correct
5 Correct 19 ms 24772 KB Output is correct
6 Correct 19 ms 24668 KB Output is correct
7 Correct 18 ms 24668 KB Output is correct
8 Correct 3 ms 3932 KB Output is correct
9 Correct 2 ms 3932 KB Output is correct
10 Correct 5 ms 3932 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3932 KB Output is correct
2 Correct 2 ms 3992 KB Output is correct
3 Correct 23 ms 25320 KB Output is correct
4 Correct 19 ms 24664 KB Output is correct
5 Correct 19 ms 24772 KB Output is correct
6 Correct 19 ms 24668 KB Output is correct
7 Correct 18 ms 24668 KB Output is correct
8 Correct 3 ms 3932 KB Output is correct
9 Correct 2 ms 3932 KB Output is correct
10 Correct 5 ms 3932 KB Output is correct
11 Correct 18 ms 24664 KB Output is correct
12 Correct 19 ms 24668 KB Output is correct
13 Correct 2 ms 3932 KB Output is correct
14 Correct 20 ms 24668 KB Output is correct
15 Correct 2 ms 3928 KB Output is correct
16 Correct 17 ms 24752 KB Output is correct
17 Correct 2 ms 3932 KB Output is correct
18 Correct 18 ms 24816 KB Output is correct
19 Correct 3 ms 3932 KB Output is correct
20 Correct 14 ms 24412 KB Output is correct
21 Correct 19 ms 24664 KB Output is correct
22 Correct 4 ms 3932 KB Output is correct
23 Correct 18 ms 25872 KB Output is correct
24 Correct 6 ms 3932 KB Output is correct
25 Correct 19 ms 25948 KB Output is correct
26 Correct 24 ms 25176 KB Output is correct
27 Correct 19 ms 25760 KB Output is correct
28 Correct 19 ms 25116 KB Output is correct
29 Correct 18 ms 25692 KB Output is correct
30 Correct 18 ms 25696 KB Output is correct
31 Correct 20 ms 26204 KB Output is correct
32 Correct 20 ms 25632 KB Output is correct
33 Correct 19 ms 26160 KB Output is correct
34 Correct 19 ms 25944 KB Output is correct
35 Correct 9 ms 14676 KB Output is correct
36 Correct 10 ms 14684 KB Output is correct
37 Correct 11 ms 14732 KB Output is correct
38 Correct 6 ms 9332 KB Output is correct
39 Correct 6 ms 9308 KB Output is correct
40 Correct 20 ms 26652 KB Output is correct
41 Correct 5 ms 9308 KB Output is correct
42 Correct 20 ms 26768 KB Output is correct
43 Correct 23 ms 26936 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3932 KB Output is correct
2 Correct 2 ms 3988 KB Output is correct
3 Correct 2 ms 3992 KB Output is correct
4 Correct 2 ms 3932 KB Output is correct
5 Correct 2 ms 3932 KB Output is correct
6 Correct 2 ms 3932 KB Output is correct
7 Correct 2 ms 3932 KB Output is correct
8 Correct 2 ms 3932 KB Output is correct
9 Correct 2 ms 3932 KB Output is correct
10 Correct 2 ms 4008 KB Output is correct
11 Correct 334 ms 337816 KB Output is correct
12 Correct 2 ms 3928 KB Output is correct
13 Correct 342 ms 337788 KB Output is correct
14 Correct 2 ms 3932 KB Output is correct
15 Correct 350 ms 337764 KB Output is correct
16 Correct 321 ms 337908 KB Output is correct
17 Correct 328 ms 337748 KB Output is correct
18 Correct 314 ms 337748 KB Output is correct

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3932 KB Output is correct
2 Correct 2 ms 3992 KB Output is correct
3 Correct 23 ms 25320 KB Output is correct
4 Correct 19 ms 24664 KB Output is correct
5 Correct 19 ms 24772 KB Output is correct
6 Correct 19 ms 24668 KB Output is correct
7 Correct 18 ms 24668 KB Output is correct
8 Correct 3 ms 3932 KB Output is correct
9 Correct 2 ms 3932 KB Output is correct
10 Correct 5 ms 3932 KB Output is correct
11 Correct 18 ms 24664 KB Output is correct
12 Correct 19 ms 24668 KB Output is correct
13 Correct 2 ms 3932 KB Output is correct
14 Correct 20 ms 24668 KB Output is correct
15 Correct 2 ms 3928 KB Output is correct
16 Correct 17 ms 24752 KB Output is correct
17 Correct 2 ms 3932 KB Output is correct
18 Correct 18 ms 24816 KB Output is correct
19 Correct 3 ms 3932 KB Output is correct
20 Correct 14 ms 24412 KB Output is correct
21 Correct 19 ms 24664 KB Output is correct
22 Correct 4 ms 3932 KB Output is correct
23 Correct 18 ms 25872 KB Output is correct
24 Correct 6 ms 3932 KB Output is correct
25 Correct 19 ms 25948 KB Output is correct
26 Correct 24 ms 25176 KB Output is correct
27 Correct 19 ms 25760 KB Output is correct
28 Correct 19 ms 25116 KB Output is correct
29 Correct 18 ms 25692 KB Output is correct
30 Correct 18 ms 25696 KB Output is correct
31 Correct 20 ms 26204 KB Output is correct
32 Correct 20 ms 25632 KB Output is correct
33 Correct 19 ms 26160 KB Output is correct
34 Correct 19 ms 25944 KB Output is correct
35 Correct 9 ms 14676 KB Output is correct
36 Correct 10 ms 14684 KB Output is correct
37 Correct 11 ms 14732 KB Output is correct
38 Correct 6 ms 9332 KB Output is correct
39 Correct 6 ms 9308 KB Output is correct
40 Correct 20 ms 26652 KB Output is correct
41 Correct 5 ms 9308 KB Output is correct
42 Correct 20 ms 26768 KB Output is correct
43 Correct 23 ms 26936 KB Output is correct
44 Correct 24 ms 28760 KB Output is correct
45 Correct 2 ms 3932 KB Output is correct
46 Incorrect 20 ms 26716 KB Output isn't correct
47 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3932 KB Output is correct
2 Correct 2 ms 3992 KB Output is correct
3 Correct 23 ms 25320 KB Output is correct
4 Correct 19 ms 24664 KB Output is correct
5 Correct 19 ms 24772 KB Output is correct
6 Correct 19 ms 24668 KB Output is correct
7 Correct 18 ms 24668 KB Output is correct
8 Correct 3 ms 3932 KB Output is correct
9 Correct 2 ms 3932 KB Output is correct
10 Correct 5 ms 3932 KB Output is correct
11 Correct 18 ms 24664 KB Output is correct
12 Correct 19 ms 24668 KB Output is correct
13 Correct 2 ms 3932 KB Output is correct
14 Correct 20 ms 24668 KB Output is correct
15 Correct 2 ms 3928 KB Output is correct
16 Correct 17 ms 24752 KB Output is correct
17 Correct 2 ms 3932 KB Output is correct
18 Correct 18 ms 24816 KB Output is correct
19 Correct 3 ms 3932 KB Output is correct
20 Correct 14 ms 24412 KB Output is correct
21 Correct 19 ms 24664 KB Output is correct
22 Correct 4 ms 3932 KB Output is correct
23 Correct 18 ms 25872 KB Output is correct
24 Correct 6 ms 3932 KB Output is correct
25 Correct 19 ms 25948 KB Output is correct
26 Correct 24 ms 25176 KB Output is correct
27 Correct 19 ms 25760 KB Output is correct
28 Correct 19 ms 25116 KB Output is correct
29 Correct 18 ms 25692 KB Output is correct
30 Correct 18 ms 25696 KB Output is correct
31 Correct 20 ms 26204 KB Output is correct
32 Correct 20 ms 25632 KB Output is correct
33 Correct 19 ms 26160 KB Output is correct
34 Correct 19 ms 25944 KB Output is correct
35 Correct 9 ms 14676 KB Output is correct
36 Correct 10 ms 14684 KB Output is correct
37 Correct 11 ms 14732 KB Output is correct
38 Correct 6 ms 9332 KB Output is correct
39 Correct 6 ms 9308 KB Output is correct
40 Correct 20 ms 26652 KB Output is correct
41 Correct 5 ms 9308 KB Output is correct
42 Correct 20 ms 26768 KB Output is correct
43 Correct 23 ms 26936 KB Output is correct
44 Correct 2 ms 3932 KB Output is correct
45 Incorrect 271 ms 322756 KB Output isn't correct
46 Halted 0 ms 0 KB -