oj.uz

Submission #932907

# Submission time Handle Problem Language Result Execution time Memory
932907 2024-02-24T13:08:09 Z Amirreza_Fakhri Naboj (COCI22_naboj) C++17
110 / 110
 151 ms 15304 KB 
// In the name of the God
#include <bits/stdc++.h>
#define ll long long
// #define int long long
#define pb push_back
#define F first
#define S second
#define mp make_pair
#define pii pair <int, int>
#define smin(x, y) (x) = min((x), (y))
#define smax(x, y) (x) = max((x), (y))
#define all(x) (x).begin(), (x).end()
using namespace std;

const int inf = 1e9+7;
const int mod = 998244353;
const int maxn = 2e5+5;

int n, m, cnt[maxn];
vector <int> adj[maxn], vec;
queue <int> q;

int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int a, b; cin >> a >> b;
        adj[--b].pb(--a);
        cnt[a]++;
    }
    for (int i = 0; i < n; i++) {
        if (!cnt[i]) q.push(i);
    }
    while (q.size()) {
        int v = q.front(); q.pop();
        vec.pb(v);
        for (int u : adj[v]) {
            cnt[u]--;
            if (!cnt[u]) q.push(u);
        }
    }
    if (vec.size() != n) cout << -1 << '\n';
    else {
        cout << n << '\n';
        for (int v : vec) cout << v+1 << ' ' << 1 << '\n';
    }
    return 0;
}

Compilation message

naboj.cpp: In function 'int32_t main()':
naboj.cpp:42:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |     if (vec.size() != n) cout << -1 << '\n';
      |         ~~~~~~~~~~~^~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4952 KB Output is correct
2 Correct 1 ms 4952 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 1 ms 4956 KB Output is correct
10 Correct 1 ms 4952 KB Output is correct
11 Correct 1 ms 4956 KB Output is correct
12 Correct 1 ms 4956 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4952 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 12952 KB Output is correct
2 Correct 69 ms 13004 KB Output is correct
3 Correct 33 ms 9192 KB Output is correct
4 Correct 66 ms 13004 KB Output is correct
5 Correct 70 ms 13004 KB Output is correct
6 Correct 82 ms 13112 KB Output is correct
7 Correct 69 ms 12996 KB Output is correct
8 Correct 51 ms 11208 KB Output is correct
9 Correct 69 ms 13000 KB Output is correct
10 Correct 66 ms 13000 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4952 KB Output is correct
2 Correct 1 ms 4952 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 1 ms 4956 KB Output is correct
10 Correct 1 ms 4952 KB Output is correct
11 Correct 1 ms 4956 KB Output is correct
12 Correct 1 ms 4956 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4952 KB Output is correct
15 Correct 79 ms 12952 KB Output is correct
16 Correct 69 ms 13004 KB Output is correct
17 Correct 33 ms 9192 KB Output is correct
18 Correct 66 ms 13004 KB Output is correct
19 Correct 70 ms 13004 KB Output is correct
20 Correct 82 ms 13112 KB Output is correct
21 Correct 69 ms 12996 KB Output is correct
22 Correct 51 ms 11208 KB Output is correct
23 Correct 69 ms 13000 KB Output is correct
24 Correct 66 ms 13000 KB Output is correct
25 Correct 80 ms 10320 KB Output is correct
26 Correct 65 ms 11724 KB Output is correct
27 Correct 75 ms 11860 KB Output is correct
28 Correct 91 ms 12116 KB Output is correct
29 Correct 54 ms 11736 KB Output is correct
30 Correct 88 ms 12116 KB Output is correct
31 Correct 18 ms 5976 KB Output is correct
32 Correct 79 ms 14956 KB Output is correct
33 Correct 125 ms 15212 KB Output is correct
34 Correct 81 ms 15052 KB Output is correct
35 Correct 136 ms 15116 KB Output is correct
36 Correct 89 ms 15052 KB Output is correct
37 Correct 109 ms 15152 KB Output is correct
38 Correct 98 ms 15048 KB Output is correct
39 Correct 120 ms 15048 KB Output is correct
40 Correct 117 ms 15304 KB Output is correct
41 Correct 107 ms 15044 KB Output is correct
42 Correct 125 ms 15060 KB Output is correct
43 Correct 88 ms 15056 KB Output is correct
44 Correct 151 ms 15220 KB Output is correct
45 Correct 83 ms 15056 KB Output is correct
46 Correct 109 ms 14952 KB Output is correct