oj.uz

Submission #782221

# Submission time Handle Problem Language Result Execution time Memory
782221 2023-07-13T16:31:18 Z devariaota Naboj (COCI22_naboj) C++17
110 / 110
 245 ms 17640 KB 
#include <bits/stdc++.h>
#define LL long long
using namespace std;
int main()
{
  LL n,m;
  scanf("%lld %lld",&n,&m);
  vector<LL>adj[n+5];
  LL degree[n+5];
  memset(degree,0,sizeof(degree));
  for(LL a=1;a<=m;a++)
  {
    LL x,y;
    scanf("%lld %lld",&x,&y);
    adj[x].push_back(y);
    degree[y]++;
  }
  queue<LL>q;
  vector<LL>v;
  for(LL a=1;a<=n;a++)
  {
    if(!degree[a])
    {
      q.push(a);
      v.push_back(a);
    }
  }
  
  
  while(!q.empty())
  {
    
    LL x=q.front();
    
    q.pop();
    for(LL a:adj[x])
    {
      degree[a]--;
      if(!degree[a])
      {
        q.push(a);
        v.push_back(a);
      }
    }
  }
  if(v.size()!=n)printf("-1\n");
  else{
    printf("%lld\n",v.size());
    for(LL a:v)
    {
      printf("%lld 0\n",a);
    }
  }
}

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:46:14: 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)printf("-1\n");
      |      ~~~~~~~~^~~
naboj.cpp:48:16: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   48 |     printf("%lld\n",v.size());
      |             ~~~^    ~~~~~~~~
      |                |          |
      |                |          std::vector<long long int>::size_type {aka long unsigned int}
      |                long long int
      |             %ld
naboj.cpp:7:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |   scanf("%lld %lld",&n,&m);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~
naboj.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     scanf("%lld %lld",&x,&y);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 14740 KB Output is correct
2 Correct 84 ms 14716 KB Output is correct
3 Correct 37 ms 7924 KB Output is correct
4 Correct 122 ms 14772 KB Output is correct
5 Correct 89 ms 14736 KB Output is correct
6 Correct 81 ms 14752 KB Output is correct
7 Correct 77 ms 14832 KB Output is correct
8 Correct 54 ms 11620 KB Output is correct
9 Correct 92 ms 14780 KB Output is correct
10 Correct 76 ms 14716 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 81 ms 14740 KB Output is correct
16 Correct 84 ms 14716 KB Output is correct
17 Correct 37 ms 7924 KB Output is correct
18 Correct 122 ms 14772 KB Output is correct
19 Correct 89 ms 14736 KB Output is correct
20 Correct 81 ms 14752 KB Output is correct
21 Correct 77 ms 14832 KB Output is correct
22 Correct 54 ms 11620 KB Output is correct
23 Correct 92 ms 14780 KB Output is correct
24 Correct 76 ms 14716 KB Output is correct
25 Correct 108 ms 11160 KB Output is correct
26 Correct 91 ms 13496 KB Output is correct
27 Correct 118 ms 13780 KB Output is correct
28 Correct 185 ms 14956 KB Output is correct
29 Correct 125 ms 14084 KB Output is correct
30 Correct 185 ms 14756 KB Output is correct
31 Correct 18 ms 2228 KB Output is correct
32 Correct 117 ms 14132 KB Output is correct
33 Correct 148 ms 17216 KB Output is correct
34 Correct 101 ms 14312 KB Output is correct
35 Correct 166 ms 17152 KB Output is correct
36 Correct 120 ms 14032 KB Output is correct
37 Correct 200 ms 16564 KB Output is correct
38 Correct 182 ms 15664 KB Output is correct
39 Correct 194 ms 17064 KB Output is correct
40 Correct 137 ms 16176 KB Output is correct
41 Correct 140 ms 16132 KB Output is correct
42 Correct 173 ms 17616 KB Output is correct
43 Correct 120 ms 14608 KB Output is correct
44 Correct 245 ms 17640 KB Output is correct
45 Correct 115 ms 14280 KB Output is correct
46 Correct 137 ms 16096 KB Output is correct