oj.uz

Submission #782435

# Submission time Handle Problem Language Result Execution time Memory
782435 2023-07-14T01:10:42 Z makanhulia Naboj (COCI22_naboj) C++17
110 / 110
 628 ms 38016 KB 
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define pii pair<int,int>
#define fr first
#define sc second
using namespace std;

const int N = 2e5+5;
const int M = 5e5+5;

vector<int> adj[N];
vector<int> opp[N];
vector<int> marker;
vector<int> par;
vector<int> keep;
vector<bool> vis;
vector<int> v;

bool dfs(int x) {
    marker[x] = 1;
    for (auto item : adj[x]) {
        if (!marker[item]) {
            par[item] = x;
            if (dfs(item)) return true;
        } else if (marker[item] == 1) return true;
    }
    marker[x] = 2;
    return false;
}

void dfs2(int x) {
    vis[x] = 1;
    for (auto item : adj[x]) {
        if (!vis[item] and adj[item].size() and opp[item].size())
            dfs2(item);
    }
    v.push_back(x);
}

signed main() { 
    int n, m; cin >> n >> m;
    marker.assign(n+1, 0);
    par.assign(n+1, -1);
    vis.assign(n+1, 0);

    for (int i = 0; i < m; i++) {
        int a, b; cin >> a >> b;
        adj[b].pb(a);
        opp[a].pb(b);
    }
    for (int i = 1; i <= n; i++) {
        if (!marker[i]) {
            if (dfs(i)) {
                cout << -1 << endl;
                return 0;
            }
        }
    }
    vis.assign(n+1, 0);
    for (int i = 1; i <= n; i++) {
        if (!vis[i] and adj[i].size() and opp[i].size())
            dfs2(i);
    }
    
    reverse(v.begin(), v.end());
    cout << n << endl;
    for (auto item : v) {
        cout << item << " " << 1 << endl;
    }
    for (int i = 1; i <= n; i++) {
        if (!vis[i]) {
            cout << i << " " << (adj[i].size() == 0) << endl;
        }
    }
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 4 ms 9684 KB Output is correct
5 Correct 4 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 4 ms 9684 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9696 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 5 ms 9696 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 389 ms 24080 KB Output is correct
2 Correct 373 ms 26612 KB Output is correct
3 Correct 185 ms 18480 KB Output is correct
4 Correct 368 ms 26548 KB Output is correct
5 Correct 381 ms 26572 KB Output is correct
6 Correct 377 ms 26524 KB Output is correct
7 Correct 399 ms 26668 KB Output is correct
8 Correct 294 ms 22852 KB Output is correct
9 Correct 369 ms 26600 KB Output is correct
10 Correct 375 ms 26584 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 4 ms 9684 KB Output is correct
5 Correct 4 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 4 ms 9684 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9696 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 5 ms 9696 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 389 ms 24080 KB Output is correct
16 Correct 373 ms 26612 KB Output is correct
17 Correct 185 ms 18480 KB Output is correct
18 Correct 368 ms 26548 KB Output is correct
19 Correct 381 ms 26572 KB Output is correct
20 Correct 377 ms 26524 KB Output is correct
21 Correct 399 ms 26668 KB Output is correct
22 Correct 294 ms 22852 KB Output is correct
23 Correct 369 ms 26600 KB Output is correct
24 Correct 375 ms 26584 KB Output is correct
25 Correct 248 ms 29932 KB Output is correct
26 Correct 213 ms 28024 KB Output is correct
27 Correct 251 ms 30656 KB Output is correct
28 Correct 365 ms 34896 KB Output is correct
29 Correct 183 ms 26048 KB Output is correct
30 Correct 322 ms 34532 KB Output is correct
31 Correct 44 ms 13460 KB Output is correct
32 Correct 408 ms 28668 KB Output is correct
33 Correct 572 ms 36636 KB Output is correct
34 Correct 410 ms 29356 KB Output is correct
35 Correct 570 ms 36920 KB Output is correct
36 Correct 395 ms 28472 KB Output is correct
37 Correct 529 ms 34724 KB Output is correct
38 Correct 491 ms 32444 KB Output is correct
39 Correct 589 ms 36448 KB Output is correct
40 Correct 497 ms 33856 KB Output is correct
41 Correct 504 ms 33528 KB Output is correct
42 Correct 628 ms 37704 KB Output is correct
43 Correct 426 ms 30148 KB Output is correct
44 Correct 617 ms 38016 KB Output is correct
45 Correct 410 ms 29376 KB Output is correct
46 Correct 552 ms 33732 KB Output is correct