Cod sursa(job #3264848)

Utilizator TeodorG8Cirstov Teodor TeodorG8 Data 24 decembrie 2024 18:08:37
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.76 kb
#include <iostream>
#include <vector>
#include <queue>

using namespace std;


vector<int> L[100005];
queue<int> q;
int n,m,x,y,viz[100005],c,s;

void bfs(int k)
{
    q.push(k);
    viz[k]=1;
    while(!q.empty())
    {
        k=q.front();
        for(auto i:L[k])
        {
            if(viz[i]==0)
            {
                viz[i]=viz[k]+1;
                q.push(i);
            }
        }
        q.pop();
    }
}

int main()
{
    cin>>n>>m>>s;
    for(int i=1; i<=m; i++)
    {
        cin>>x>>y;
        L[x].push_back(y);
    }
    viz[s]=1;
    bfs(s);
    for(int i=1; i<=n; i++)
        {
            if(viz[i]==0)
                cout<<-1<<" ";
            else
                cout<<viz[i]-1<<" ";
        }
}