oj.uz

Submission #718530

# Submission time Handle Problem Language Result Execution time Memory
718530 2023-04-04T09:34:37 Z Augustyn Naboj (COCI22_naboj) C++17
110 / 110
 289 ms 17180 KB 
#include<bits/stdc++.h>
using namespace std;
#define x 200001
int n,m,sw[x],odp[x],it;
vector<int>p[x];
bool jo[x],to[x];
bool c;
void dfs(int t)
{
    jo[t]=to[t]=1;
    for(int i:p[t])
    {
        if(to[i]==1)    
            c=1;
        else if(jo[i]==0)
            dfs(i);
    }
    to[t]=0;
    odp[++it]=t;
}
int main()
{
    scanf("%d%d",&n,&m);
    while(m--)
    {
        int a,b;
        scanf("%d%d",&a,&b);
        p[b].push_back(a);
        sw[a]++;
    }
    for(int i=1;i<=n;++i)
        if(sw[i]==0)
            dfs(i);
            
    if(it!=n)
        c=1;
    if(c)
    {
        printf("-1");
        return 0;
    }
    printf("%d\n",n);
    for(int i=1;i<=n;++i)
        printf("%d 0\n",odp[i]);
    
}

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
naboj.cpp:27:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         scanf("%d%d",&a,&b);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 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 108 ms 12844 KB Output is correct
2 Correct 117 ms 12812 KB Output is correct
3 Correct 50 ms 9008 KB Output is correct
4 Correct 123 ms 12804 KB Output is correct
5 Correct 101 ms 12744 KB Output is correct
6 Correct 107 ms 12748 KB Output is correct
7 Correct 120 ms 12836 KB Output is correct
8 Correct 94 ms 11232 KB Output is correct
9 Correct 134 ms 12748 KB Output is correct
10 Correct 108 ms 12768 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 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 108 ms 12844 KB Output is correct
16 Correct 117 ms 12812 KB Output is correct
17 Correct 50 ms 9008 KB Output is correct
18 Correct 123 ms 12804 KB Output is correct
19 Correct 101 ms 12744 KB Output is correct
20 Correct 107 ms 12748 KB Output is correct
21 Correct 120 ms 12836 KB Output is correct
22 Correct 94 ms 11232 KB Output is correct
23 Correct 134 ms 12748 KB Output is correct
24 Correct 108 ms 12768 KB Output is correct
25 Correct 221 ms 14876 KB Output is correct
26 Correct 136 ms 13080 KB Output is correct
27 Correct 212 ms 14940 KB Output is correct
28 Correct 193 ms 17180 KB Output is correct
29 Correct 170 ms 11724 KB Output is correct
30 Correct 218 ms 16988 KB Output is correct
31 Correct 26 ms 6784 KB Output is correct
32 Correct 138 ms 14860 KB Output is correct
33 Correct 224 ms 15012 KB Output is correct
34 Correct 135 ms 14832 KB Output is correct
35 Correct 289 ms 15008 KB Output is correct
36 Correct 138 ms 14896 KB Output is correct
37 Correct 193 ms 15004 KB Output is correct
38 Correct 192 ms 14840 KB Output is correct
39 Correct 240 ms 15052 KB Output is correct
40 Correct 181 ms 14976 KB Output is correct
41 Correct 184 ms 14964 KB Output is correct
42 Correct 215 ms 15180 KB Output is correct
43 Correct 180 ms 14796 KB Output is correct
44 Correct 244 ms 15152 KB Output is correct
45 Correct 139 ms 14868 KB Output is correct
46 Correct 181 ms 14880 KB Output is correct