Cod sursa(job #2916403)

Utilizator AndreiMargaritMargarit Andrei AndreiMargarit Data 29 iulie 2022 16:46:26
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.8 kb
#include <iostream>
#include <fstream>
#include <queue>

using namespace std;

ifstream f("bfs.in");
ofstream g("bfs.out");

int a[1001][1001],viz[1001],cost[1001],n,m,i,l,c,s,b,lung;
queue <pair<int,int>>q;

void bfs()
{
    while(!q.empty())
    {
        b=q.front().first;
        lung=q.front().second;
        for(i=1;i<=n;i++)
        {
            if(a[b][i]==1&&viz[i]==0&&b!=i)
            {
                q.push({i,lung+1});
                viz[i]=1;
            }
        }
        if(cost[b]==0)
            cost[b]=lung;
        q.pop();
    }
}

int main()
{
    f>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        f>>l>>c;
        a[l][c]=1;
    }
    q.push({s,1});
    bfs();
    for(i=1;i<=n;i++)
    {
        cout<<cost[i]-1<<" ";
    }
    return 0;
}