oj.uz

Submission #1035534

# Submission time Handle Problem Language Result Execution time Memory
1035534 2024-07-26T11:46:23 Z vjudge1 Political Development (BOI17_politicaldevelopment) C++17
39 / 100
 3000 ms 338236 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, X = 1e3;

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> bt2[N], r, taken, 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) {
  if (c++ > X) return;

  int sz = taken.count();
  if (sz > ans) {
    ans = sz;
    clean(sz+1);
  }

  shuffle(all(adj[x]), rng);
  for (int& y : adj[x]) { 
    if (c++ > X) return;
    if ((r[y] && sz+1 <= ans) || taken[y] || (taken & bt2[y]).count() < sz) continue;

    taken[y] = 1;
    bitset<N> toTakePrev = toTake;
    toTake &= bt2[y];

    dfs(y);
    if (c++ > X) return;

    toTake = toTakePrev;
    taken[y] = 0;
  }
}

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

  cin >> n >> k;
  ans = 1;
  vt.resize(n);
  for (int i = 0; i < n; i++) {
    vt[i] = i;
    bt2[i][i] = toTake[i] = 1;

    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()) {
        bt2[i][y] = 1;
        adj[i].push_back(y);

        bt2[y][i] = 1;
        adj[y].push_back(i);
      }
    }
  }

  shuffle(all(vt), rng);
  for (int i = 0; i < n; i++) {
    if (r[vt[i]]) continue;

    c = 0;

    taken.reset();
    taken[vt[i]] = 1;
    toTake = bt2[vt[i]];

    dfs(vt[i]);

    /*if (rng() % 5 == 0) */r[vt[i]] = 1;
  }

  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;
      |         ~~~~~~~~~~~~~~~~^~~
politicaldevelopment.cpp: In function 'void dfs(int)':
politicaldevelopment.cpp:35:71: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   35 |     if ((r[y] && sz+1 <= ans) || taken[y] || (taken & bt2[y]).count() < sz) continue;
      |                                              ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3928 KB Output is correct
2 Correct 3 ms 3932 KB Output is correct
3 Correct 21 ms 26016 KB Output is correct
4 Correct 19 ms 25692 KB Output is correct
5 Correct 13 ms 25432 KB Output is correct
6 Correct 13 ms 25948 KB Output is correct
7 Correct 14 ms 25692 KB Output is correct
8 Correct 19 ms 23900 KB Output is correct
9 Correct 3 ms 3932 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3928 KB Output is correct
2 Correct 3 ms 3932 KB Output is correct
3 Correct 21 ms 26016 KB Output is correct
4 Correct 19 ms 25692 KB Output is correct
5 Correct 13 ms 25432 KB Output is correct
6 Correct 13 ms 25948 KB Output is correct
7 Correct 14 ms 25692 KB Output is correct
8 Correct 19 ms 23900 KB Output is correct
9 Correct 3 ms 3932 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 14 ms 25692 KB Output is correct
12 Correct 14 ms 25692 KB Output is correct
13 Correct 2 ms 3928 KB Output is correct
14 Correct 15 ms 25436 KB Output is correct
15 Correct 2 ms 3932 KB Output is correct
16 Correct 14 ms 25688 KB Output is correct
17 Correct 2 ms 3928 KB Output is correct
18 Correct 18 ms 25764 KB Output is correct
19 Correct 17 ms 23964 KB Output is correct
20 Correct 10 ms 25432 KB Output is correct
21 Correct 16 ms 25436 KB Output is correct
22 Correct 8 ms 23896 KB Output is correct
23 Correct 21 ms 26524 KB Output is correct
24 Correct 16 ms 23896 KB Output is correct
25 Correct 30 ms 26460 KB Output is correct
26 Correct 30 ms 26280 KB Output is correct
27 Correct 27 ms 26200 KB Output is correct
28 Correct 27 ms 26204 KB Output is correct
29 Correct 25 ms 26204 KB Output is correct
30 Correct 555 ms 26204 KB Output is correct
31 Correct 36 ms 26460 KB Output is correct
32 Correct 489 ms 26460 KB Output is correct
33 Correct 35 ms 26460 KB Output is correct
34 Correct 36 ms 26460 KB Output is correct
35 Correct 22 ms 14680 KB Output is correct
36 Correct 18 ms 14684 KB Output is correct
37 Correct 16 ms 14684 KB Output is correct
38 Correct 43 ms 9308 KB Output is correct
39 Correct 31 ms 9308 KB Output is correct
40 Correct 42 ms 27480 KB Output is correct
41 Correct 40 ms 9368 KB Output is correct
42 Correct 38 ms 26972 KB Output is correct
43 Correct 36 ms 26968 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 24092 KB Output is correct
2 Correct 4 ms 3932 KB Output is correct
3 Correct 2 ms 3932 KB Output is correct
4 Correct 2 ms 3932 KB Output is correct
5 Correct 2 ms 3932 KB Output is correct
6 Correct 3 ms 4188 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 3996 KB Output is correct
10 Correct 2 ms 3932 KB Output is correct
11 Correct 1935 ms 338236 KB Output is correct
12 Correct 2 ms 3932 KB Output is correct
13 Correct 1982 ms 338124 KB Output is correct
14 Correct 2 ms 3992 KB Output is correct
15 Correct 2001 ms 338096 KB Output is correct
16 Correct 1924 ms 338000 KB Output is correct
17 Correct 1867 ms 338204 KB Output is correct
18 Correct 1842 ms 338112 KB Output is correct

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3928 KB Output is correct
2 Correct 3 ms 3932 KB Output is correct
3 Correct 21 ms 26016 KB Output is correct
4 Correct 19 ms 25692 KB Output is correct
5 Correct 13 ms 25432 KB Output is correct
6 Correct 13 ms 25948 KB Output is correct
7 Correct 14 ms 25692 KB Output is correct
8 Correct 19 ms 23900 KB Output is correct
9 Correct 3 ms 3932 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 14 ms 25692 KB Output is correct
12 Correct 14 ms 25692 KB Output is correct
13 Correct 2 ms 3928 KB Output is correct
14 Correct 15 ms 25436 KB Output is correct
15 Correct 2 ms 3932 KB Output is correct
16 Correct 14 ms 25688 KB Output is correct
17 Correct 2 ms 3928 KB Output is correct
18 Correct 18 ms 25764 KB Output is correct
19 Correct 17 ms 23964 KB Output is correct
20 Correct 10 ms 25432 KB Output is correct
21 Correct 16 ms 25436 KB Output is correct
22 Correct 8 ms 23896 KB Output is correct
23 Correct 21 ms 26524 KB Output is correct
24 Correct 16 ms 23896 KB Output is correct
25 Correct 30 ms 26460 KB Output is correct
26 Correct 30 ms 26280 KB Output is correct
27 Correct 27 ms 26200 KB Output is correct
28 Correct 27 ms 26204 KB Output is correct
29 Correct 25 ms 26204 KB Output is correct
30 Correct 555 ms 26204 KB Output is correct
31 Correct 36 ms 26460 KB Output is correct
32 Correct 489 ms 26460 KB Output is correct
33 Correct 35 ms 26460 KB Output is correct
34 Correct 36 ms 26460 KB Output is correct
35 Correct 22 ms 14680 KB Output is correct
36 Correct 18 ms 14684 KB Output is correct
37 Correct 16 ms 14684 KB Output is correct
38 Correct 43 ms 9308 KB Output is correct
39 Correct 31 ms 9308 KB Output is correct
40 Correct 42 ms 27480 KB Output is correct
41 Correct 40 ms 9368 KB Output is correct
42 Correct 38 ms 26972 KB Output is correct
43 Correct 36 ms 26968 KB Output is correct
44 Correct 17 ms 28760 KB Output is correct
45 Correct 2 ms 3932 KB Output is correct
46 Correct 35 ms 26972 KB Output is correct
47 Correct 110 ms 28756 KB Output is correct
48 Correct 41 ms 26972 KB Output is correct
49 Correct 114 ms 28764 KB Output is correct
50 Correct 121 ms 28672 KB Output is correct
51 Incorrect 407 ms 31320 KB Output isn't correct
52 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3928 KB Output is correct
2 Correct 3 ms 3932 KB Output is correct
3 Correct 21 ms 26016 KB Output is correct
4 Correct 19 ms 25692 KB Output is correct
5 Correct 13 ms 25432 KB Output is correct
6 Correct 13 ms 25948 KB Output is correct
7 Correct 14 ms 25692 KB Output is correct
8 Correct 19 ms 23900 KB Output is correct
9 Correct 3 ms 3932 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 14 ms 25692 KB Output is correct
12 Correct 14 ms 25692 KB Output is correct
13 Correct 2 ms 3928 KB Output is correct
14 Correct 15 ms 25436 KB Output is correct
15 Correct 2 ms 3932 KB Output is correct
16 Correct 14 ms 25688 KB Output is correct
17 Correct 2 ms 3928 KB Output is correct
18 Correct 18 ms 25764 KB Output is correct
19 Correct 17 ms 23964 KB Output is correct
20 Correct 10 ms 25432 KB Output is correct
21 Correct 16 ms 25436 KB Output is correct
22 Correct 8 ms 23896 KB Output is correct
23 Correct 21 ms 26524 KB Output is correct
24 Correct 16 ms 23896 KB Output is correct
25 Correct 30 ms 26460 KB Output is correct
26 Correct 30 ms 26280 KB Output is correct
27 Correct 27 ms 26200 KB Output is correct
28 Correct 27 ms 26204 KB Output is correct
29 Correct 25 ms 26204 KB Output is correct
30 Correct 555 ms 26204 KB Output is correct
31 Correct 36 ms 26460 KB Output is correct
32 Correct 489 ms 26460 KB Output is correct
33 Correct 35 ms 26460 KB Output is correct
34 Correct 36 ms 26460 KB Output is correct
35 Correct 22 ms 14680 KB Output is correct
36 Correct 18 ms 14684 KB Output is correct
37 Correct 16 ms 14684 KB Output is correct
38 Correct 43 ms 9308 KB Output is correct
39 Correct 31 ms 9308 KB Output is correct
40 Correct 42 ms 27480 KB Output is correct
41 Correct 40 ms 9368 KB Output is correct
42 Correct 38 ms 26972 KB Output is correct
43 Correct 36 ms 26968 KB Output is correct
44 Correct 2 ms 3932 KB Output is correct
45 Correct 1103 ms 326368 KB Output is correct
46 Correct 292 ms 308304 KB Output is correct
47 Correct 872 ms 326228 KB Output is correct
48 Correct 894 ms 326480 KB Output is correct
49 Correct 140 ms 280888 KB Output is correct
50 Execution timed out 3068 ms 333500 KB Time limit exceeded
51 Halted 0 ms 0 KB -