oj.uz

Submission #782582

# Submission time Handle Problem Language Result Execution time Memory
782582 2023-07-14T06:05:58 Z devariaota Naboj (COCI22_naboj) C++17
110 / 110
 680 ms 22704 KB 
#include<bits/stdc++.h>
using namespace std;
#define ioss ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define pii pair<int, int>
#define fi first
#define se second
#define pb push_back
int n, m;
vector<int> adj[200004];
bool vis[200004];
int cnt[200004];
queue<int> q;
void toposort(int u) {
    if(vis[u]) return;

    q.push(u);
    vis[u] = 1;
    for(auto v : adj[u]) cnt[v]--;
    for(auto v : adj[u]) {
        if(!vis[v] && cnt[v] == 0) toposort(v);
    }
}
int main() {
    ioss;
    cin >> n >> m;
    set<int> tmp;
    for(int i = 0; i < m; i++) {
        int a, b; cin >> a >> b;
        tmp.insert(a);
        adj[b].pb(a);
        cnt[a]++;
    }

    for(int i = 1; i <= n; i++) {
        if(!vis[i] && cnt[i] == 0) toposort(i);
        // cout << cnt[i] << endl;
    }
    bool ok = 1;
    for(int i = 1; i <= n; i++) {
        if(!vis[i]) {
            ok = 0;
            break;
        }
    }
    if(!ok) {
        cout << -1 << endl;
        return 0;
    }
    cout << q.size() << endl;
    while(!q.empty()) {
        int u = q.front();
        q.pop();
        if(tmp.count(u)) cout << u << " " << 1 << endl;
        else cout << u << " " << 0 << endl;
    }
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5012 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 5024 KB Output is correct
10 Correct 2 ms 5020 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5020 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 415 ms 19628 KB Output is correct
2 Correct 420 ms 19260 KB Output is correct
3 Correct 218 ms 12544 KB Output is correct
4 Correct 512 ms 19252 KB Output is correct
5 Correct 434 ms 19268 KB Output is correct
6 Correct 508 ms 19340 KB Output is correct
7 Correct 528 ms 19248 KB Output is correct
8 Correct 336 ms 16184 KB Output is correct
9 Correct 468 ms 19232 KB Output is correct
10 Correct 452 ms 19304 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5012 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 5024 KB Output is correct
10 Correct 2 ms 5020 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5020 KB Output is correct
15 Correct 415 ms 19628 KB Output is correct
16 Correct 420 ms 19260 KB Output is correct
17 Correct 218 ms 12544 KB Output is correct
18 Correct 512 ms 19252 KB Output is correct
19 Correct 434 ms 19268 KB Output is correct
20 Correct 508 ms 19340 KB Output is correct
21 Correct 528 ms 19248 KB Output is correct
22 Correct 336 ms 16184 KB Output is correct
23 Correct 468 ms 19232 KB Output is correct
24 Correct 452 ms 19304 KB Output is correct
25 Correct 260 ms 16752 KB Output is correct
26 Correct 195 ms 19404 KB Output is correct
27 Correct 232 ms 20192 KB Output is correct
28 Correct 296 ms 21072 KB Output is correct
29 Correct 177 ms 18672 KB Output is correct
30 Correct 349 ms 21052 KB Output is correct
31 Correct 29 ms 7040 KB Output is correct
32 Correct 439 ms 20304 KB Output is correct
33 Correct 567 ms 22584 KB Output is correct
34 Correct 408 ms 20600 KB Output is correct
35 Correct 680 ms 22436 KB Output is correct
36 Correct 429 ms 20188 KB Output is correct
37 Correct 531 ms 22084 KB Output is correct
38 Correct 511 ms 21568 KB Output is correct
39 Correct 600 ms 22440 KB Output is correct
40 Correct 566 ms 21952 KB Output is correct
41 Correct 556 ms 21900 KB Output is correct
42 Correct 661 ms 22704 KB Output is correct
43 Correct 444 ms 20776 KB Output is correct
44 Correct 615 ms 22692 KB Output is correct
45 Correct 505 ms 20472 KB Output is correct
46 Correct 654 ms 21924 KB Output is correct