oj.uz

Submission #782581

# Submission time Handle Problem Language Result Execution time Memory
782581 2023-07-14T06:02:38 Z devariaota Naboj (COCI22_naboj) C++17
110 / 110
 657 ms 24116 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> st;



void toposort(int u) {
    if(vis[u]) return;


    vis[u] = 1;


    st.push(u);

    // cout << "::" << u << endl;

    for(auto v : adj[u]) {
        // cout << v << endl;
        cnt[v]--;
    }

    for(auto v : adj[u]) {
        if(!vis[v] && cnt[v] == 0) toposort(v);
    }

    // cout << u << endl;
}
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 << st.size() << endl;
    while(!st.empty()) {
        int u = st.front();
        st.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 3 ms 5020 KB Output is correct
3 Correct 3 ms 5024 KB Output is correct
4 Correct 3 ms 5024 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 5024 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 5024 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 2 ms 5028 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 408 ms 19864 KB Output is correct
2 Correct 387 ms 20688 KB Output is correct
3 Correct 205 ms 13408 KB Output is correct
4 Correct 401 ms 20772 KB Output is correct
5 Correct 391 ms 20772 KB Output is correct
6 Correct 410 ms 20676 KB Output is correct
7 Correct 387 ms 20680 KB Output is correct
8 Correct 285 ms 17116 KB Output is correct
9 Correct 421 ms 20696 KB Output is correct
10 Correct 395 ms 20636 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 3 ms 5020 KB Output is correct
3 Correct 3 ms 5024 KB Output is correct
4 Correct 3 ms 5024 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 5024 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 5024 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 2 ms 5028 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 408 ms 19864 KB Output is correct
16 Correct 387 ms 20688 KB Output is correct
17 Correct 205 ms 13408 KB Output is correct
18 Correct 401 ms 20772 KB Output is correct
19 Correct 391 ms 20772 KB Output is correct
20 Correct 410 ms 20676 KB Output is correct
21 Correct 387 ms 20680 KB Output is correct
22 Correct 285 ms 17116 KB Output is correct
23 Correct 421 ms 20696 KB Output is correct
24 Correct 395 ms 20636 KB Output is correct
25 Correct 210 ms 18148 KB Output is correct
26 Correct 175 ms 20812 KB Output is correct
27 Correct 216 ms 21668 KB Output is correct
28 Correct 301 ms 22672 KB Output is correct
29 Correct 165 ms 20060 KB Output is correct
30 Correct 333 ms 22524 KB Output is correct
31 Correct 26 ms 7728 KB Output is correct
32 Correct 443 ms 21744 KB Output is correct
33 Correct 563 ms 23856 KB Output is correct
34 Correct 438 ms 21888 KB Output is correct
35 Correct 557 ms 23928 KB Output is correct
36 Correct 400 ms 21576 KB Output is correct
37 Correct 527 ms 23456 KB Output is correct
38 Correct 477 ms 22980 KB Output is correct
39 Correct 558 ms 23776 KB Output is correct
40 Correct 527 ms 23296 KB Output is correct
41 Correct 511 ms 23204 KB Output is correct
42 Correct 611 ms 24116 KB Output is correct
43 Correct 529 ms 22216 KB Output is correct
44 Correct 657 ms 24092 KB Output is correct
45 Correct 429 ms 21916 KB Output is correct
46 Correct 560 ms 23428 KB Output is correct