oj.uz

Submission #783747

# Submission time Handle Problem Language Result Execution time Memory
783747 2023-07-15T09:42:34 Z christinelynn Naboj (COCI22_naboj) C++17
110 / 110
 445 ms 18500 KB 
#include<bits/stdc++.h>
#define ll long long
#define fi first
#define sec second
#define pb push_back
#define pqueue priority_queue
#define int long long
#define pii pair<int,int>
#define supercepat ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(0);
using namespace std;
int tc,ans=0,n,m;
int in1,in2;
vector<int> adj[200005];
bool vis[200005];
int point[200005];
vector<int> topo;
void dfs(int x){
  if(vis[x]) return;
  vis[x]=1;
  topo.pb(x);
  for(auto i : adj[x]){
    point[i]--;
    if(point[i]==0){
      dfs(i);
    }
  }
}
main(){
  supercepat;
  cin>>n>>m;
  for(int i=1;i<=m;i++){
    cin>>in1>>in2;
    adj[in2].pb(in1);
    point[in1]++;
  }
  for(int i=1;i<=n;i++){
    if(point[i]==0&&!vis[i]){
      dfs(i);
    }
  }
  if(topo.size()!=n){
    cout<<-1<<endl;
  }
  else{
    cout<<topo.size()<<endl;
    for(auto i : topo){
      cout<<i<<" "<<1<<endl;
    }
  }
}

Compilation message

naboj.cpp:28:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   28 | main(){
      | ^~~~
naboj.cpp: In function 'int main()':
naboj.cpp:41:17: 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]
   41 |   if(topo.size()!=n){
      |      ~~~~~~~~~~~^~~

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 2 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 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 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 2 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 338 ms 14636 KB Output is correct
2 Correct 274 ms 14612 KB Output is correct
3 Correct 142 ms 10024 KB Output is correct
4 Correct 288 ms 14532 KB Output is correct
5 Correct 288 ms 14700 KB Output is correct
6 Correct 288 ms 14520 KB Output is correct
7 Correct 285 ms 14528 KB Output is correct
8 Correct 234 ms 12488 KB Output is correct
9 Correct 283 ms 14544 KB Output is correct
10 Correct 294 ms 14584 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 2 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 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 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 2 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 338 ms 14636 KB Output is correct
16 Correct 274 ms 14612 KB Output is correct
17 Correct 142 ms 10024 KB Output is correct
18 Correct 288 ms 14532 KB Output is correct
19 Correct 288 ms 14700 KB Output is correct
20 Correct 288 ms 14520 KB Output is correct
21 Correct 285 ms 14528 KB Output is correct
22 Correct 234 ms 12488 KB Output is correct
23 Correct 283 ms 14544 KB Output is correct
24 Correct 294 ms 14584 KB Output is correct
25 Correct 82 ms 12928 KB Output is correct
26 Correct 75 ms 13608 KB Output is correct
27 Correct 111 ms 13932 KB Output is correct
28 Correct 124 ms 15180 KB Output is correct
29 Correct 71 ms 14020 KB Output is correct
30 Correct 168 ms 15068 KB Output is correct
31 Correct 18 ms 6484 KB Output is correct
32 Correct 284 ms 16448 KB Output is correct
33 Correct 414 ms 18040 KB Output is correct
34 Correct 337 ms 16444 KB Output is correct
35 Correct 410 ms 18072 KB Output is correct
36 Correct 296 ms 16364 KB Output is correct
37 Correct 400 ms 17500 KB Output is correct
38 Correct 378 ms 16920 KB Output is correct
39 Correct 420 ms 18076 KB Output is correct
40 Correct 329 ms 17316 KB Output is correct
41 Correct 365 ms 17232 KB Output is correct
42 Correct 423 ms 18388 KB Output is correct
43 Correct 339 ms 16504 KB Output is correct
44 Correct 445 ms 18500 KB Output is correct
45 Correct 313 ms 16424 KB Output is correct
46 Correct 344 ms 17272 KB Output is correct