oj.uz

Submission #718525

# Submission time Handle Problem Language Result Execution time Memory
718525 2023-04-04T09:28:57 Z Augustyn Naboj (COCI22_naboj) C++17
110 / 110
 248 ms 15204 KB 
#include<iostream>
#include<vector>
using namespace std;
#define x 200001
int n,m;
vector<int>pol[x];
bool juzodw[x],terodw[x];
int stp_wch[x],odp[x],it;
bool dfs(int t)
{
    juzodw[t]=1;
    terodw[t]=1;
    for(int i:pol[t])
    {
        if(terodw[i]==1)
            return 1;
        if(juzodw[i]==0)
            if(dfs(i))
                return 1;
    }
    terodw[t]=0;
    odp[++it]=t;
    return 0;
}
int main()
{
    scanf("%d%d",&n,&m);
    while(m)
    {
        --m;
        int a,b;
        scanf("%d%d",&a,&b);
        pol[b].push_back(a);
        stp_wch[a]++;
    }
    for(int i=1;i<=n;++i)
        if(stp_wch[i]==0)
            if(dfs(i))
            {
                printf("-1");
                return 0;
            }
    if(it!=n)
    {
        printf("-1");
        return 0;
    }
    printf("%d\n",n);
    for(int i=1;i<=n;++i)
        printf("%d 0\n",odp[i]);
    return 0;
}

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
naboj.cpp:32:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         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 4 ms 4948 KB Output is correct
5 Correct 3 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 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 4920 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 12852 KB Output is correct
2 Correct 106 ms 12876 KB Output is correct
3 Correct 50 ms 9044 KB Output is correct
4 Correct 112 ms 12788 KB Output is correct
5 Correct 107 ms 12756 KB Output is correct
6 Correct 104 ms 12732 KB Output is correct
7 Correct 113 ms 12768 KB Output is correct
8 Correct 88 ms 11124 KB Output is correct
9 Correct 110 ms 12760 KB Output is correct
10 Correct 98 ms 12804 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 4 ms 4948 KB Output is correct
5 Correct 3 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 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 4920 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 12852 KB Output is correct
16 Correct 106 ms 12876 KB Output is correct
17 Correct 50 ms 9044 KB Output is correct
18 Correct 112 ms 12788 KB Output is correct
19 Correct 107 ms 12756 KB Output is correct
20 Correct 104 ms 12732 KB Output is correct
21 Correct 113 ms 12768 KB Output is correct
22 Correct 88 ms 11124 KB Output is correct
23 Correct 110 ms 12760 KB Output is correct
24 Correct 98 ms 12804 KB Output is correct
25 Correct 148 ms 10288 KB Output is correct
26 Correct 101 ms 11104 KB Output is correct
27 Correct 158 ms 11676 KB Output is correct
28 Correct 184 ms 12152 KB Output is correct
29 Correct 100 ms 10804 KB Output is correct
30 Correct 185 ms 12108 KB Output is correct
31 Correct 25 ms 5972 KB Output is correct
32 Correct 125 ms 14892 KB Output is correct
33 Correct 212 ms 15104 KB Output is correct
34 Correct 160 ms 14868 KB Output is correct
35 Correct 248 ms 15076 KB Output is correct
36 Correct 118 ms 14772 KB Output is correct
37 Correct 183 ms 14968 KB Output is correct
38 Correct 161 ms 14888 KB Output is correct
39 Correct 191 ms 15088 KB Output is correct
40 Correct 197 ms 14868 KB Output is correct
41 Correct 184 ms 14924 KB Output is correct
42 Correct 236 ms 15160 KB Output is correct
43 Correct 131 ms 14788 KB Output is correct
44 Correct 201 ms 15204 KB Output is correct
45 Correct 116 ms 14796 KB Output is correct
46 Correct 173 ms 14984 KB Output is correct