Cod sursa(job #2818001)

Utilizator denisa0230Zarioiu Denisa denisa0230 Data 14 decembrie 2021 23:42:39
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.72 kb
#include <fstream>
#include <queue>
#include <vector>
using namespace std;

ifstream fin("bfs.in");
ofstream fout("bfs.out");

int n,m,s,dist[100001];
queue <int> q;
vector <int> g[100001];

void bfs()
{
    q.push(s);
    dist[s]=1;
    int x;
    while(q.size()!=0)
    {
        x=q.front();
        q.pop();
        for(int i=0;i<g[x].size();i++)
            if(dist[g[x][i]]==0)
                {dist[g[x][i]]=dist[x]+1;
                q.push(g[x][i]);
                }
    }
}

int main()
{
    int x,y,i;
    fin>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        g[x].push_back(y);
    }
    bfs();
    for(i=1;i<=n;i++)
        fout<<dist[i]-1<<' ';
    return 0;
}