oj.uz

Submission #781972

# Submission time Handle Problem Language Result Execution time Memory
781972 2023-07-13T14:19:22 Z makanhulia Naboj (COCI22_naboj) C++17
110 / 110
 146 ms 16264 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define ld long double
#define fi first
#define se second

queue<int> q;
vector<int> child[200005], ans;
int par[200005];

int main() { 
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    /*
    1 2
    2 3
    3 4
    urutan penarikan = 4 -> 3 -> 2 -> 1
    urutan pengeboman = 1 -> 2 -> 3 -> 4
    3 3
    1 2
    2 3
    1 3
    3 -> 2 -> 1
    3 -> 1
    */
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int u, v;
        cin >> u >> v;
        child[u].push_back(v);
        par[v]++;
    }
    for (int i = 1; i <= n; i++) if (par[i] == 0) q.push(i);
    while (!q.empty()) {
        int x = q.front();
        q.pop();
        ans.push_back(x);
        for (auto u : child[x]) {
            par[u]--;
            if (par[u] == 0) q.push(u);
        }
    }
    for (int i = 1; i <= n; i++) {
        if (par[i] != 0) {
            cout << -1 << "\n";
            return 0;
        }
    }
    cout << (int)ans.size() << "\n";
    for (auto x : ans) cout << x << " 0" << "\n";
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 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 2 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5024 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5032 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4952 KB Output is correct
13 Correct 3 ms 5028 KB Output is correct
14 Correct 2 ms 5020 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 13912 KB Output is correct
2 Correct 71 ms 13980 KB Output is correct
3 Correct 33 ms 10248 KB Output is correct
4 Correct 80 ms 13972 KB Output is correct
5 Correct 83 ms 13972 KB Output is correct
6 Correct 84 ms 14012 KB Output is correct
7 Correct 73 ms 13960 KB Output is correct
8 Correct 55 ms 12272 KB Output is correct
9 Correct 76 ms 13932 KB Output is correct
10 Correct 70 ms 14028 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 2 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 2 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5024 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 5032 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4952 KB Output is correct
13 Correct 3 ms 5028 KB Output is correct
14 Correct 2 ms 5020 KB Output is correct
15 Correct 72 ms 13912 KB Output is correct
16 Correct 71 ms 13980 KB Output is correct
17 Correct 33 ms 10248 KB Output is correct
18 Correct 80 ms 13972 KB Output is correct
19 Correct 83 ms 13972 KB Output is correct
20 Correct 84 ms 14012 KB Output is correct
21 Correct 73 ms 13960 KB Output is correct
22 Correct 55 ms 12272 KB Output is correct
23 Correct 76 ms 13932 KB Output is correct
24 Correct 70 ms 14028 KB Output is correct
25 Correct 92 ms 12092 KB Output is correct
26 Correct 90 ms 14132 KB Output is correct
27 Correct 95 ms 13596 KB Output is correct
28 Correct 115 ms 13900 KB Output is correct
29 Correct 62 ms 13176 KB Output is correct
30 Correct 104 ms 13852 KB Output is correct
31 Correct 17 ms 6860 KB Output is correct
32 Correct 73 ms 13312 KB Output is correct
33 Correct 146 ms 15120 KB Output is correct
34 Correct 85 ms 13480 KB Output is correct
35 Correct 146 ms 16180 KB Output is correct
36 Correct 70 ms 13664 KB Output is correct
37 Correct 116 ms 15120 KB Output is correct
38 Correct 98 ms 15368 KB Output is correct
39 Correct 143 ms 16144 KB Output is correct
40 Correct 105 ms 15624 KB Output is correct
41 Correct 105 ms 15548 KB Output is correct
42 Correct 143 ms 16264 KB Output is correct
43 Correct 79 ms 14728 KB Output is correct
44 Correct 134 ms 16140 KB Output is correct
45 Correct 81 ms 14288 KB Output is correct
46 Correct 109 ms 15400 KB Output is correct