oj.uz

Submission #782483

# Submission time Handle Problem Language Result Execution time Memory
782483 2023-07-14T03:01:00 Z kebine Naboj (COCI22_naboj) C++17
110 / 110
 179 ms 26292 KB 
# include <bits/stdc++.h>
# define int long long
# define vi vector<int>
# define pb push_back
# define pii pair<int, int>
# define fi first
# define se second
# define endl '\n'
# define jess ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;

int n, m, rec[500005];
vi adj[500005];
bool vis[500005];

void solve() {
    cin >> n >> m;
    for(int i=1; i<=m; i++) {
        int a, b;
        cin >> a >> b;
        adj[b].pb(a);
        rec[a]++;
    }
    queue<int> q;
    vi v;
    for(int i=1; i<=n; i++) {
        if(rec[i]==0) {
            q.push(i);
            v.pb(i);
        } 
    }
    while(!q.empty()) {
        int cur=q.front();
        q.pop();
        for(int i : adj[cur]) {
            if(vis[i]) continue;
            rec[i]--;
            if(rec[i]==0) {
                q.push(i);
                vis[i]=1;
                v.pb(i);
            }
        }
    }
    if(v.size()<n) {
        cout << -1 << endl;
        return;
    }
    cout << n << endl;
    for(int i : v) cout << i << " " << 1 << endl;
}
 
signed main() {
    jess;
    solve();
}

Compilation message

naboj.cpp: In function 'void solve()':
naboj.cpp:46:16: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   46 |     if(v.size()<n) {
      |        ~~~~~~~~^~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 11988 KB Output is correct
2 Correct 5 ms 11988 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct
4 Correct 5 ms 11988 KB Output is correct
5 Correct 5 ms 11988 KB Output is correct
6 Correct 5 ms 11988 KB Output is correct
7 Correct 5 ms 11988 KB Output is correct
8 Correct 5 ms 11988 KB Output is correct
9 Correct 6 ms 12076 KB Output is correct
10 Correct 5 ms 11964 KB Output is correct
11 Correct 5 ms 12080 KB Output is correct
12 Correct 5 ms 12080 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 86 ms 22020 KB Output is correct
2 Correct 88 ms 22104 KB Output is correct
3 Correct 41 ms 17336 KB Output is correct
4 Correct 84 ms 22092 KB Output is correct
5 Correct 85 ms 22004 KB Output is correct
6 Correct 79 ms 22088 KB Output is correct
7 Correct 91 ms 22104 KB Output is correct
8 Correct 61 ms 19788 KB Output is correct
9 Correct 81 ms 22096 KB Output is correct
10 Correct 82 ms 22096 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 11988 KB Output is correct
2 Correct 5 ms 11988 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct
4 Correct 5 ms 11988 KB Output is correct
5 Correct 5 ms 11988 KB Output is correct
6 Correct 5 ms 11988 KB Output is correct
7 Correct 5 ms 11988 KB Output is correct
8 Correct 5 ms 11988 KB Output is correct
9 Correct 6 ms 12076 KB Output is correct
10 Correct 5 ms 11964 KB Output is correct
11 Correct 5 ms 12080 KB Output is correct
12 Correct 5 ms 12080 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 86 ms 22020 KB Output is correct
16 Correct 88 ms 22104 KB Output is correct
17 Correct 41 ms 17336 KB Output is correct
18 Correct 84 ms 22092 KB Output is correct
19 Correct 85 ms 22004 KB Output is correct
20 Correct 79 ms 22088 KB Output is correct
21 Correct 91 ms 22104 KB Output is correct
22 Correct 61 ms 19788 KB Output is correct
23 Correct 81 ms 22096 KB Output is correct
24 Correct 82 ms 22096 KB Output is correct
25 Correct 88 ms 20292 KB Output is correct
26 Correct 94 ms 21232 KB Output is correct
27 Correct 93 ms 21516 KB Output is correct
28 Correct 125 ms 22580 KB Output is correct
29 Correct 74 ms 21844 KB Output is correct
30 Correct 114 ms 22496 KB Output is correct
31 Correct 21 ms 13860 KB Output is correct
32 Correct 90 ms 24492 KB Output is correct
33 Correct 146 ms 25756 KB Output is correct
34 Correct 106 ms 24508 KB Output is correct
35 Correct 143 ms 25900 KB Output is correct
36 Correct 89 ms 24544 KB Output is correct
37 Correct 138 ms 25264 KB Output is correct
38 Correct 116 ms 24860 KB Output is correct
39 Correct 179 ms 25736 KB Output is correct
40 Correct 128 ms 25092 KB Output is correct
41 Correct 123 ms 25112 KB Output is correct
42 Correct 177 ms 26276 KB Output is correct
43 Correct 102 ms 24532 KB Output is correct
44 Correct 153 ms 26292 KB Output is correct
45 Correct 101 ms 24464 KB Output is correct
46 Correct 148 ms 25188 KB Output is correct