oj.uz

답안 #945700

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
945700 2024-03-14T06:31:30 Z vjudge1 Amusement Park (CEOI19_amusementpark) C++17
19 / 100
 3000 ms 592 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
#define size(x) (int)x.size()

template<class S, class T>
bool chmin(S &a, const T &b) {
  return a > b ? (a = b) == b : false;
}
template<class S, class T>
bool chmax(S &a, const T &b) {
  return a < b ? (a = b) == b : false;
}

bool check(vector<vector<int>> g) {
  int n = size(g);
  vector<bool> vis(n, false);
  vector<int> top_sort;
  function<void(int)> dfs = [&](int v) {
    vis[v] = true;
    for (int to : g[v]) {
      if (!vis[to]) dfs(to);
    }
    top_sort.push_back(v);
  };
  for (int i = 0; i < n; ++i) {
    if (!vis[i]) dfs(i);
  }
  reverse(all(top_sort));
  int pos[n];
  for (int i = 0; i < n; ++i) {
    pos[top_sort[i]] = i;
  }
  for (int i = 0; i < n; ++i) {
    for (int to : g[i]) {
      if (pos[to] < pos[i]) return false;
    }
  }
  return true;
}

signed main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n, m; cin >> n >> m;
  int a[m], b[m];
  for (int i = 0; i < m; ++i) {
    cin >> a[i] >> b[i];
    a[i]--, b[i]--;
  }
  int res = 0;
  for (int mask = 0; mask < (1 << m); ++mask) {
    vector<vector<int>> g(n);
    for (int i = 0; i < m; ++i) {
      if (mask >> i & 1) {
        g[b[i]].push_back(a[i]);
      } else {
        g[a[i]].push_back(b[i]);
      }
    }
    if (check(g)) {
      res += __builtin_popcount(mask);
    }
  }
  cout << res;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 348 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 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 4 ms 348 KB Output is correct
24 Correct 28 ms 452 KB Output is correct

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 348 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 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 4 ms 348 KB Output is correct
24 Correct 28 ms 452 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 4 ms 348 KB Output is correct
29 Correct 31 ms 348 KB Output is correct
30 Correct 256 ms 428 KB Output is correct
31 Correct 2247 ms 428 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 4 ms 348 KB Output is correct
35 Correct 67 ms 348 KB Output is correct
36 Correct 1223 ms 592 KB Output is correct
37 Execution timed out 3059 ms 428 KB Time limit exceeded
38 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 348 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 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 4 ms 348 KB Output is correct
24 Correct 28 ms 452 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 4 ms 348 KB Output is correct
29 Correct 31 ms 348 KB Output is correct
30 Correct 256 ms 428 KB Output is correct
31 Correct 2247 ms 428 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 4 ms 348 KB Output is correct
35 Correct 67 ms 348 KB Output is correct
36 Correct 1223 ms 592 KB Output is correct
37 Execution timed out 3059 ms 428 KB Time limit exceeded
38 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 348 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 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 4 ms 348 KB Output is correct
24 Correct 28 ms 452 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 4 ms 348 KB Output is correct
29 Correct 31 ms 348 KB Output is correct
30 Correct 256 ms 428 KB Output is correct
31 Correct 2247 ms 428 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 4 ms 348 KB Output is correct
35 Correct 67 ms 348 KB Output is correct
36 Correct 1223 ms 592 KB Output is correct
37 Execution timed out 3059 ms 428 KB Time limit exceeded
38 Halted 0 ms 0 KB -