Cod sursa(job #2678312)

Utilizator rareshinnhoMiroiu Rares rareshinnho Data 28 noiembrie 2020 11:49:08
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.73 kb
#include <bits/stdc++.h>

using namespace std;

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

vector<int>v[100001];
queue<int> Q;
int n,m,dist[100001];

void bfs(int s)
{
    int i;
    Q.push(s);
    dist[s]=1;
    while(!Q.empty())
    {
        int nod=Q.front();
        Q.pop();
        for(i=0;i<v[nod].size();i++)
        {
            if(!dist[v[nod][i]])
            {
                Q.push(v[nod][i]);
                dist[v[nod][i]]=dist[nod]+1;
            }
        }
    }
}

int s,x,y;
int main()
{
    f>>n>>m>>s;
    for(int i=1;i<=m;i++)
    {
        f>>x>>y;
        v[x].push_back(y);
    }
    bfs(s);
    for(int i=1;i<=n;i++)
        g<<dist[i]-1<<" ";


    return 0;
}