oj.uz

Submission #1003147

# Submission time Handle Problem Language Result Execution time Memory
1003147 2024-06-20T06:46:24 Z vjudge1 Subtree (INOI20_subtree) C++17
8 / 100
 119 ms 2904 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5+10;
vector<int> g[N];
struct DSU {
  vector<int> e;
  DSU(int n) {
    e=vector<int>(n+1, -1);
  }
  int get(int x) {
    if(e[x] < 0)return x;
    return e[x] = get(e[x]);
  }
  int sz(int x) {
    return -e[get(x)];
  }
  bool unite(int a, int b) {
    a=get(a),b=get(b);
    if(a == b)return false;
    if(-e[a] > -e[b]) {
      swap(a,b);
    }
    e[b]+=e[a];
    e[a] = b;
    return true;
  }
};
int main () {
  cin.tie(0)->sync_with_stdio(0);
  int n, m;
  cin >> n >> m;
  for(int i  = 0;i<m;i++) {
    int u, v;
    cin >> u >> v;
    u--,v--;
    g[u].push_back(v);
  }
  if(n <= 20) {
    int ans=0;
    for(int mask = 1;mask<(1<<n);mask++) {
      DSU d(n);
      int cnt=0;
      int f=-1, sz=0;
      for(int j = 0;j<n;j++) {
        if(mask&(1<<j)) {
          sz++;
          f=j;
          for(int to:g[j]){
            if(mask&(1<<to)) {
              d.unite(to, j);
              cnt++;
            }
          }
        }
      }
      if(d.sz(f) == sz and cnt==sz-1){
        ans++;
      }
    }
    cout << ans <<"\n";
  }
  else {

  }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 2 ms 2652 KB Output is correct
5 Correct 2 ms 2804 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 99 ms 2652 KB Output is correct
9 Correct 96 ms 2652 KB Output is correct
10 Correct 101 ms 2652 KB Output is correct
11 Correct 111 ms 2784 KB Output is correct
12 Correct 48 ms 2652 KB Output is correct
13 Correct 101 ms 2648 KB Output is correct
14 Correct 49 ms 2652 KB Output is correct
15 Correct 50 ms 2652 KB Output is correct
16 Correct 105 ms 2780 KB Output is correct
17 Correct 47 ms 2652 KB Output is correct
18 Correct 50 ms 2648 KB Output is correct
19 Correct 51 ms 2652 KB Output is correct
20 Correct 105 ms 2652 KB Output is correct
21 Correct 119 ms 2652 KB Output is correct
22 Correct 50 ms 2652 KB Output is correct
23 Correct 96 ms 2780 KB Output is correct
24 Correct 46 ms 2648 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 4 ms 2652 KB Output is correct
29 Correct 48 ms 2624 KB Output is correct
30 Correct 98 ms 2780 KB Output is correct
31 Correct 53 ms 2652 KB Output is correct
32 Correct 59 ms 2648 KB Output is correct
33 Correct 52 ms 2648 KB Output is correct
34 Correct 97 ms 2652 KB Output is correct
35 Correct 103 ms 2652 KB Output is correct
36 Correct 114 ms 2648 KB Output is correct
37 Correct 108 ms 2652 KB Output is correct
38 Correct 101 ms 2648 KB Output is correct
39 Correct 110 ms 2652 KB Output is correct
40 Correct 92 ms 2784 KB Output is correct
41 Correct 94 ms 2648 KB Output is correct
42 Correct 45 ms 2784 KB Output is correct
43 Correct 42 ms 2784 KB Output is correct
44 Correct 91 ms 2648 KB Output is correct
45 Correct 97 ms 2652 KB Output is correct
46 Correct 92 ms 2652 KB Output is correct
47 Correct 89 ms 2648 KB Output is correct
48 Correct 92 ms 2652 KB Output is correct
49 Correct 92 ms 2652 KB Output is correct
50 Correct 98 ms 2652 KB Output is correct
51 Correct 95 ms 2648 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 2 ms 2652 KB Output is correct
5 Correct 2 ms 2804 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 99 ms 2652 KB Output is correct
9 Correct 96 ms 2652 KB Output is correct
10 Correct 101 ms 2652 KB Output is correct
11 Correct 111 ms 2784 KB Output is correct
12 Correct 48 ms 2652 KB Output is correct
13 Correct 101 ms 2648 KB Output is correct
14 Correct 49 ms 2652 KB Output is correct
15 Correct 50 ms 2652 KB Output is correct
16 Correct 105 ms 2780 KB Output is correct
17 Correct 47 ms 2652 KB Output is correct
18 Correct 50 ms 2648 KB Output is correct
19 Correct 51 ms 2652 KB Output is correct
20 Correct 105 ms 2652 KB Output is correct
21 Correct 119 ms 2652 KB Output is correct
22 Correct 50 ms 2652 KB Output is correct
23 Correct 96 ms 2780 KB Output is correct
24 Correct 46 ms 2648 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 4 ms 2652 KB Output is correct
29 Correct 48 ms 2624 KB Output is correct
30 Correct 98 ms 2780 KB Output is correct
31 Correct 53 ms 2652 KB Output is correct
32 Correct 59 ms 2648 KB Output is correct
33 Correct 52 ms 2648 KB Output is correct
34 Correct 97 ms 2652 KB Output is correct
35 Correct 103 ms 2652 KB Output is correct
36 Correct 114 ms 2648 KB Output is correct
37 Correct 108 ms 2652 KB Output is correct
38 Correct 101 ms 2648 KB Output is correct
39 Correct 110 ms 2652 KB Output is correct
40 Correct 92 ms 2784 KB Output is correct
41 Correct 94 ms 2648 KB Output is correct
42 Correct 45 ms 2784 KB Output is correct
43 Correct 42 ms 2784 KB Output is correct
44 Correct 91 ms 2648 KB Output is correct
45 Correct 97 ms 2652 KB Output is correct
46 Correct 92 ms 2652 KB Output is correct
47 Correct 89 ms 2648 KB Output is correct
48 Correct 92 ms 2652 KB Output is correct
49 Correct 92 ms 2652 KB Output is correct
50 Correct 98 ms 2652 KB Output is correct
51 Correct 95 ms 2648 KB Output is correct
52 Incorrect 2 ms 2904 KB Output isn't correct
53 Halted 0 ms 0 KB -

Subtask #4
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 2 ms 2652 KB Output is correct
5 Correct 2 ms 2804 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 99 ms 2652 KB Output is correct
9 Correct 96 ms 2652 KB Output is correct
10 Correct 101 ms 2652 KB Output is correct
11 Correct 111 ms 2784 KB Output is correct
12 Correct 48 ms 2652 KB Output is correct
13 Correct 101 ms 2648 KB Output is correct
14 Correct 49 ms 2652 KB Output is correct
15 Correct 50 ms 2652 KB Output is correct
16 Correct 105 ms 2780 KB Output is correct
17 Correct 47 ms 2652 KB Output is correct
18 Correct 50 ms 2648 KB Output is correct
19 Correct 51 ms 2652 KB Output is correct
20 Correct 105 ms 2652 KB Output is correct
21 Correct 119 ms 2652 KB Output is correct
22 Correct 50 ms 2652 KB Output is correct
23 Correct 96 ms 2780 KB Output is correct
24 Correct 46 ms 2648 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 4 ms 2652 KB Output is correct
29 Correct 48 ms 2624 KB Output is correct
30 Correct 98 ms 2780 KB Output is correct
31 Correct 53 ms 2652 KB Output is correct
32 Correct 59 ms 2648 KB Output is correct
33 Correct 52 ms 2648 KB Output is correct
34 Correct 97 ms 2652 KB Output is correct
35 Correct 103 ms 2652 KB Output is correct
36 Correct 114 ms 2648 KB Output is correct
37 Correct 108 ms 2652 KB Output is correct
38 Correct 101 ms 2648 KB Output is correct
39 Correct 110 ms 2652 KB Output is correct
40 Correct 92 ms 2784 KB Output is correct
41 Correct 94 ms 2648 KB Output is correct
42 Correct 45 ms 2784 KB Output is correct
43 Correct 42 ms 2784 KB Output is correct
44 Correct 91 ms 2648 KB Output is correct
45 Correct 97 ms 2652 KB Output is correct
46 Correct 92 ms 2652 KB Output is correct
47 Correct 89 ms 2648 KB Output is correct
48 Correct 92 ms 2652 KB Output is correct
49 Correct 92 ms 2652 KB Output is correct
50 Correct 98 ms 2652 KB Output is correct
51 Correct 95 ms 2648 KB Output is correct
52 Incorrect 1 ms 2652 KB Output isn't correct
53 Halted 0 ms 0 KB -