Submission #849903

#	Time	Username	Problem	Language	Result	Execution time	Memory
849903		1075508020060209tc	Povjerenstvo (COI22_povjerenstvo)	C++14	13 / 100	412 ms	43540 KiB

Main

#include<bits/stdc++.h>
using namespace std;
//#define int long long
int n;int m;
vector<int>er[500005];
int dgr[500005];
int isin[500005];
int has[500005];
signed main(){

cin>>n>>m;
for(int i=1;i<=m;i++){
    int a;int b;
    cin>>a>>b;
    er[b].push_back(a);
    dgr[a]++;
}
queue<int>q;
for(int i=1;i<=n;i++){
    if(dgr[i]==0){
        q.push(i);
        isin[i]=1;
    }
}
while(q.size()){
    int nw=q.front();
    q.pop();
    for(int i=0;i<er[nw].size();i++){
        int v=er[nw][i];
        dgr[v]--;
        if( isin[nw] ){
            has[v]=1;
        }
        if(dgr[v]==0){
            if(has[v]==0){
                isin[v]=1;
            }
            q.push(v);
        }
    }
}
vector<int>ans;
for(int i=1;i<=n;i++){
    if(isin[i]){ans.push_back(i);}
}
cout<<ans.size()<<endl;
for(int i=0;i<ans.size();i++){
    cout<<ans[i]<<" ";
}

}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(int i=0;i<er[nw].size();i++){
      |                 ~^~~~~~~~~~~~~~
Main.cpp:47:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 | for(int i=0;i<ans.size();i++){
      |             ~^~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 0 / 21
• Subtask 3: 0 / 33
• Subtask 4: 0 / 33