oj.uz

Submission #782203

# Submission time Handle Problem Language Result Execution time Memory
782203 2023-07-13T16:18:10 Z andecaandeci Naboj (COCI22_naboj) C++17
110 / 110
 175 ms 17768 KB 
#include<bits/stdc++.h>
 
using namespace std;
 
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long, long long>

long long n,m,deg[200005];
vector<long long> vec[200005];
queue<long long> q;

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    long long tc,i,j;
    cin>>n>>m;
    for(i=1;i<=m;i++)
    {
        long long u,v;
        cin>>u>>v;
        deg[v]++;
        vec[u].push_back(v);
    }
    vector<long long> ans;
    for(i=1;i<=n;i++)
    {
        if(deg[i] == 0)
        {
            q.push(i);
            ans.push_back(i);
        }
    }
    
    while(!q.empty())
    {
        long long node = q.front();
        q.pop();
        for(auto it : vec[node])
        {
            deg[it]--;
            if(deg[it] == 0)
            {
                q.push(it);
                ans.push_back(it);
            }
        }
    }
    for(i=1;i<=n;i++)
    {
        if(deg[i] > 0)
        {
            break;
        }
    }
    if(i <= n)
    {
        cout<<-1<<'\n';
    }
    else
    {
        cout<<ans.size()<<'\n';
        for(auto it : ans)
        {
            cout<<it<<" 0\n";
        }
    }
}

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:17:15: warning: unused variable 'tc' [-Wunused-variable]
   17 |     long long tc,i,j;
      |               ^~
naboj.cpp:17:20: warning: unused variable 'j' [-Wunused-variable]
   17 |     long long tc,i,j;
      |                    ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4960 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 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 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 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 3 ms 4948 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 78 ms 14848 KB Output is correct
2 Correct 70 ms 14756 KB Output is correct
3 Correct 35 ms 10104 KB Output is correct
4 Correct 66 ms 14800 KB Output is correct
5 Correct 79 ms 14852 KB Output is correct
6 Correct 74 ms 14760 KB Output is correct
7 Correct 67 ms 14812 KB Output is correct
8 Correct 53 ms 12600 KB Output is correct
9 Correct 76 ms 14752 KB Output is correct
10 Correct 94 ms 14904 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 3 ms 4960 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 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 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 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 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 78 ms 14848 KB Output is correct
16 Correct 70 ms 14756 KB Output is correct
17 Correct 35 ms 10104 KB Output is correct
18 Correct 66 ms 14800 KB Output is correct
19 Correct 79 ms 14852 KB Output is correct
20 Correct 74 ms 14760 KB Output is correct
21 Correct 67 ms 14812 KB Output is correct
22 Correct 53 ms 12600 KB Output is correct
23 Correct 76 ms 14752 KB Output is correct
24 Correct 94 ms 14904 KB Output is correct
25 Correct 86 ms 12712 KB Output is correct
26 Correct 72 ms 13512 KB Output is correct
27 Correct 86 ms 13900 KB Output is correct
28 Correct 115 ms 15008 KB Output is correct
29 Correct 66 ms 14072 KB Output is correct
30 Correct 117 ms 14872 KB Output is correct
31 Correct 18 ms 6416 KB Output is correct
32 Correct 73 ms 14076 KB Output is correct
33 Correct 131 ms 17268 KB Output is correct
34 Correct 93 ms 14348 KB Output is correct
35 Correct 175 ms 17264 KB Output is correct
36 Correct 82 ms 13992 KB Output is correct
37 Correct 121 ms 16632 KB Output is correct
38 Correct 106 ms 15728 KB Output is correct
39 Correct 131 ms 17056 KB Output is correct
40 Correct 124 ms 16376 KB Output is correct
41 Correct 109 ms 16072 KB Output is correct
42 Correct 150 ms 17568 KB Output is correct
43 Correct 85 ms 14748 KB Output is correct
44 Correct 175 ms 17768 KB Output is correct
45 Correct 80 ms 14456 KB Output is correct
46 Correct 110 ms 16240 KB Output is correct