Cod sursa(job #3252161)

Utilizator RusuDenisRusu Denis RusuDenis Data 28 octombrie 2024 19:02:14
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.71 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int viz[100010],n,m,i,j,x,y,s,k=0,p;
vector <int> v[100010];
queue <int> q;
void bfs(int x)
{
    viz[x]=0;
    q.push(x);
    while(q.empty()==0)
    {
        p=q.front();
        q.pop();
        for(auto vecin:v[p])
            if(viz[vecin]==-1)
            {
                q.push(vecin);
                viz[vecin]=viz[p]+1;
            }
    }
}
int main()
{
    fin>>n>>m>>s;
    for(i=1; i<=m; i++)
    {
        fin>>x>>y;
        v[x].push_back(y);
    }
    for(i=1; i<=n; i++)
        viz[i]=-1;
    bfs(s);
    for(i=1;i<=n;i++)
        fout<<viz[i]<<' ';
    return 0;
}