oj.uz

Submission #841108

# Submission time Handle Problem Language Result Execution time Memory
841108 2023-09-01T09:11:44 Z peijar Amusement Park (CEOI19_amusementpark) C++17
42 / 100
 1532 ms 1048576 KB 
#include <bits/extc++.h> /** keep-include */
#include <bits/stdc++.h>
#define int long long
using namespace std;

string to_string(string s) { return s; }
template <typename T> string to_string(T v) {
  bool first = true;
  string res = "[";
  for (const auto &x : v) {
    if (!first)
      res += ", ";
    first = false;
    res += to_string(x);
  }
  res += "]";
  return res;
}

void dbg_out() { cout << endl; }
template <typename Head, typename... Tail> void dbg_out(Head H, Tail... T) {
  cout << ' ' << to_string(H);
  dbg_out(T...);
}

#ifdef DEBUG
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

using ll = int;
// To use most bits rather than just the lowest ones:
struct chash { // large odd number for C
  const uint64_t C = ll(4e18 * acos(0)) | 71;
  ll operator()(ll x) const { return __builtin_bswap64(x * C); }
};

using hash_table = __gnu_pbds::gp_hash_table<int, int, chash>;

template <const int32_t MOD> struct ModInt {
  int32_t x;
  ModInt() : x(0) {}
  ModInt(long long u) : x(u % MOD) {
    if (x < 0)
      x += MOD;
  }
  friend bool operator==(const ModInt &a, const ModInt &b) {
    return a.x == b.x;
  }
  friend bool operator!=(const ModInt &a, const ModInt &b) {
    return a.x != b.x;
  }
  friend bool operator<(const ModInt &a, const ModInt &b) { return a.x < b.x; }
  friend bool operator>(const ModInt &a, const ModInt &b) { return a.x > b.x; }
  friend bool operator<=(const ModInt &a, const ModInt &b) {
    return a.x <= b.x;
  }
  friend bool operator>=(const ModInt &a, const ModInt &b) {
    return a.x >= b.x;
  }
  static ModInt sign(long long k) {
    return ((k & 1) ? ModInt(MOD - 1) : ModInt(1));
  }

  ModInt &operator+=(const ModInt &m) {
    x += m.x;
    if (x >= MOD)
      x -= MOD;
    return *this;
  }
  ModInt &operator-=(const ModInt &m) {
    x -= m.x;
    if (x < 0LL)
      x += MOD;
    return *this;
  }
  ModInt &operator*=(const ModInt &m) {
    x = (1LL * x * m.x) % MOD;
    return *this;
  }

  friend ModInt operator-(const ModInt &a) {
    ModInt res(a);
    if (res.x)
      res.x = MOD - res.x;
    return res;
  }
  friend ModInt operator+(const ModInt &a, const ModInt &b) {
    return ModInt(a) += ModInt(b);
  }
  friend ModInt operator-(const ModInt &a, const ModInt &b) {
    return ModInt(a) -= ModInt(b);
  }
  friend ModInt operator*(const ModInt &a, const ModInt &b) {
    return ModInt(a) *= ModInt(b);
  }

  static long long fp(long long u, long long k) {
    long long res = 1LL;
    while (k > 0LL) {
      if (k & 1LL)
        res = (res * u) % MOD;
      u = (u * u) % MOD;
      k /= 2LL;
    }
    return res;
  }

  static constexpr int mod() { return MOD; }

  ModInt fastpow(long long k) { return ModInt(fp(x, k)); }
  ModInt inv() {
    assert(x);
    return ModInt(fp(x, MOD - 2));
  }
  ModInt &operator/=(const ModInt &m) { return *this *= ModInt(m).inv(); }
  friend ModInt operator/(const ModInt &a, const ModInt &b) {
    return ModInt(a) *= ModInt(b).inv();
  }

  friend ostream &operator<<(ostream &out, const ModInt &a) {
    return out << a.x;
  }
  friend istream &operator>>(istream &in, ModInt &a) { return in >> a.x; }
  friend string to_string(ModInt u) { return to_string(u.x); }
};

// const int MOD = 1e9 + 7;
const int MOD = 998244353;
using Mint = ModInt<MOD>;

signed main(void) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);

  int n, m;
  cin >> n >> m;
  vector<int> adj(n);
  vector<int> bitAdj(n);
  for (int i = 0; i < m; ++i) {
    int u, v;
    cin >> u >> v;
    --u, --v;
    adj[u] |= 1 << v;
    bitAdj[u] |= 1 << v;
    bitAdj[v] |= 1 << u;
  }

  vector<int> areBad(n);
  for (int u = 0; u < n; ++u)
    for (int v = 0; v < u; ++v)
      if (!((1 << v) & bitAdj[u]))
        areBad[u] |= 1 << v;
  vector<vector<int>> inComplement(1 << n);
  for (int msk = 0; msk < (1 << n); ++msk) {
    int c = (1 << n) - 1 - msk;
    int complement = c;
    while (true) {
      inComplement[msk].push_back(c);
      if (!c)
        break;
      c = (c - 1) & complement;
    }
    sort(inComplement[msk].begin(), inComplement[msk].end());
  }

  vector<hash_table> ids(1 << n);
  for (int i = 0; i < (1 << n); ++i)
    for (int j = 0; j < (int)inComplement[i].size(); ++j)
      ids[i][inComplement[i][j]] = j;

  auto getId = [&](int msk, int c) {
    // return lower_bound(inComplement[msk].begin(), inComplement[msk].end(), c)
    // - inComplement[msk].begin();
    return ids[msk][c];
  };

  vector<vector<Mint>> dpBack(1 << n);
  vector<vector<Mint>> dpForward(1 << n);
  for (int msk = 0; msk < (1 << n); ++msk) {
    dpBack[msk].resize(inComplement[msk].size());
    dpForward[msk].resize(inComplement[msk].size());
  }
  dpBack[0][0] = 1;
  for (int added = 0; added < (1 << n); ++added) {
    int complement = (1 << n) - 1 - added;
    for (int i = 0; i < (int)inComplement[added].size(); ++i) {
      int bad = inComplement[added][i];
      for (int nxt = 0; nxt < n; ++nxt)
        if (!((1 << nxt) & added) and !((1 << nxt) & bad)) {
          int nxtBad = bad & (bad ^ bitAdj[nxt]);
          nxtBad |= areBad[nxt] & complement;
          int j = getId(added ^ (1 << nxt), nxtBad);
          dpBack[added ^ (1 << nxt)][j] += dpBack[added][i];
        }
    }
  }

  dpForward[(1 << n) - 1][0] = 1;
  Mint sol = 0;
  for (int added = (1 << n) - 2; added >= 0; --added) {
    for (int i = 0; i < (int)inComplement[added].size(); ++i) {
      int bad = inComplement[added][i];
      for (int nxt = 0; nxt < n; ++nxt)
        if (!((1 << nxt) & added) and !((1 << nxt) & bad)) {
          int nxtBad = bad & (bad ^ bitAdj[nxt]);
          nxtBad |= areBad[nxt] & inComplement[added].back();
          int j = getId(added ^ (1 << nxt), nxtBad);
          dpForward[added][i] += dpForward[added ^ (1 << nxt)][j];
          int cntFlip = __builtin_popcount(adj[nxt] & added);
          Mint cnt =
              dpForward[added ^ (1 << nxt)][getId(added ^ (1 << nxt), nxtBad)] *
              dpBack[added][i];
          sol += cnt * cntFlip;
        }
    }
  }
  cout << sol << endl;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 320 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 320 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 1 ms 504 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 2 ms 1108 KB Output is correct
33 Correct 2 ms 980 KB Output is correct
34 Correct 2 ms 980 KB Output is correct
35 Correct 2 ms 1108 KB Output is correct
36 Correct 2 ms 1108 KB Output is correct
37 Correct 2 ms 1108 KB Output is correct
38 Correct 2 ms 1108 KB Output is correct
39 Correct 5 ms 2516 KB Output is correct
40 Correct 5 ms 2516 KB Output is correct
41 Correct 5 ms 2516 KB Output is correct
42 Correct 5 ms 2544 KB Output is correct
43 Correct 4 ms 2516 KB Output is correct
44 Correct 4 ms 2516 KB Output is correct
45 Correct 5 ms 2516 KB Output is correct
46 Correct 5 ms 2492 KB Output is correct
47 Correct 5 ms 2516 KB Output is correct
48 Correct 5 ms 2492 KB Output is correct
49 Correct 5 ms 2516 KB Output is correct
50 Correct 4 ms 2516 KB Output is correct
51 Correct 4 ms 2516 KB Output is correct
52 Correct 14 ms 6996 KB Output is correct
53 Correct 14 ms 6976 KB Output is correct
54 Correct 14 ms 7048 KB Output is correct
55 Correct 14 ms 7044 KB Output is correct
56 Correct 13 ms 6972 KB Output is correct
57 Correct 13 ms 6964 KB Output is correct
58 Correct 13 ms 7040 KB Output is correct
59 Correct 13 ms 7008 KB Output is correct
60 Correct 13 ms 6972 KB Output is correct
61 Correct 17 ms 6996 KB Output is correct
62 Correct 13 ms 6996 KB Output is correct
63 Correct 14 ms 7040 KB Output is correct
64 Correct 13 ms 7044 KB Output is correct

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 320 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 1 ms 504 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 2 ms 1108 KB Output is correct
33 Correct 2 ms 980 KB Output is correct
34 Correct 2 ms 980 KB Output is correct
35 Correct 2 ms 1108 KB Output is correct
36 Correct 2 ms 1108 KB Output is correct
37 Correct 2 ms 1108 KB Output is correct
38 Correct 2 ms 1108 KB Output is correct
39 Correct 5 ms 2516 KB Output is correct
40 Correct 5 ms 2516 KB Output is correct
41 Correct 5 ms 2516 KB Output is correct
42 Correct 5 ms 2544 KB Output is correct
43 Correct 4 ms 2516 KB Output is correct
44 Correct 4 ms 2516 KB Output is correct
45 Correct 5 ms 2516 KB Output is correct
46 Correct 5 ms 2492 KB Output is correct
47 Correct 5 ms 2516 KB Output is correct
48 Correct 5 ms 2492 KB Output is correct
49 Correct 5 ms 2516 KB Output is correct
50 Correct 4 ms 2516 KB Output is correct
51 Correct 4 ms 2516 KB Output is correct
52 Correct 14 ms 6996 KB Output is correct
53 Correct 14 ms 6976 KB Output is correct
54 Correct 14 ms 7048 KB Output is correct
55 Correct 14 ms 7044 KB Output is correct
56 Correct 13 ms 6972 KB Output is correct
57 Correct 13 ms 6964 KB Output is correct
58 Correct 13 ms 7040 KB Output is correct
59 Correct 13 ms 7008 KB Output is correct
60 Correct 13 ms 6972 KB Output is correct
61 Correct 17 ms 6996 KB Output is correct
62 Correct 13 ms 6996 KB Output is correct
63 Correct 14 ms 7040 KB Output is correct
64 Correct 13 ms 7044 KB Output is correct
65 Correct 1420 ms 528464 KB Output is correct
66 Correct 1412 ms 528524 KB Output is correct
67 Correct 1385 ms 528580 KB Output is correct
68 Correct 1332 ms 528468 KB Output is correct
69 Correct 1532 ms 528472 KB Output is correct
70 Correct 1526 ms 528448 KB Output is correct
71 Correct 1449 ms 528464 KB Output is correct
72 Correct 1436 ms 528560 KB Output is correct
73 Correct 1454 ms 528472 KB Output is correct
74 Correct 1406 ms 528464 KB Output is correct
75 Correct 1418 ms 528472 KB Output is correct
76 Correct 1415 ms 528364 KB Output is correct
77 Runtime error 769 ms 1048576 KB Execution killed with signal 9
78 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 320 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 1 ms 504 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 2 ms 1108 KB Output is correct
33 Correct 2 ms 980 KB Output is correct
34 Correct 2 ms 980 KB Output is correct
35 Correct 2 ms 1108 KB Output is correct
36 Correct 2 ms 1108 KB Output is correct
37 Correct 2 ms 1108 KB Output is correct
38 Correct 2 ms 1108 KB Output is correct
39 Correct 5 ms 2516 KB Output is correct
40 Correct 5 ms 2516 KB Output is correct
41 Correct 5 ms 2516 KB Output is correct
42 Correct 5 ms 2544 KB Output is correct
43 Correct 4 ms 2516 KB Output is correct
44 Correct 4 ms 2516 KB Output is correct
45 Correct 5 ms 2516 KB Output is correct
46 Correct 5 ms 2492 KB Output is correct
47 Correct 5 ms 2516 KB Output is correct
48 Correct 5 ms 2492 KB Output is correct
49 Correct 5 ms 2516 KB Output is correct
50 Correct 4 ms 2516 KB Output is correct
51 Correct 4 ms 2516 KB Output is correct
52 Correct 14 ms 6996 KB Output is correct
53 Correct 14 ms 6976 KB Output is correct
54 Correct 14 ms 7048 KB Output is correct
55 Correct 14 ms 7044 KB Output is correct
56 Correct 13 ms 6972 KB Output is correct
57 Correct 13 ms 6964 KB Output is correct
58 Correct 13 ms 7040 KB Output is correct
59 Correct 13 ms 7008 KB Output is correct
60 Correct 13 ms 6972 KB Output is correct
61 Correct 17 ms 6996 KB Output is correct
62 Correct 13 ms 6996 KB Output is correct
63 Correct 14 ms 7040 KB Output is correct
64 Correct 13 ms 7044 KB Output is correct
65 Correct 1420 ms 528464 KB Output is correct
66 Correct 1412 ms 528524 KB Output is correct
67 Correct 1385 ms 528580 KB Output is correct
68 Correct 1332 ms 528468 KB Output is correct
69 Correct 1532 ms 528472 KB Output is correct
70 Correct 1526 ms 528448 KB Output is correct
71 Correct 1449 ms 528464 KB Output is correct
72 Correct 1436 ms 528560 KB Output is correct
73 Correct 1454 ms 528472 KB Output is correct
74 Correct 1406 ms 528464 KB Output is correct
75 Correct 1418 ms 528472 KB Output is correct
76 Correct 1415 ms 528364 KB Output is correct
77 Runtime error 769 ms 1048576 KB Execution killed with signal 9
78 Halted 0 ms 0 KB -